mirror of https://github.com/buggins/dlangui.git
XCB version working - except libPNG version issue
This commit is contained in:
Vadim Lopatin
parent
bf57f2f26f
commit
a3d195fb8b
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@ -1,419 +1,424 @@
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module dlangui.widgets.widget;
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public import dlangui.core.types;
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public import dlangui.widgets.styles;
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public import dlangui.graphics.drawbuf;
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public import dlangui.graphics.images;
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public import dlangui.graphics.fonts;
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import dlangui.platforms.common.platform;
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import std.algorithm;
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/// Visibility (see Android View Visibility)
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enum Visibility : ubyte {
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/// Visible on screen (default)
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Visible,
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/// Not visible, but occupies a space in layout
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Invisible,
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/// Completely hidden, as not has been added
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Gone
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}
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class Widget {
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/// widget id
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protected string _id;
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/// current widget position, set by layout()
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protected Rect _pos;
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/// widget visibility: either Visible, Invisible, Gone
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protected Visibility _visibility = Visibility.Visible; // visible by default
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/// style id to lookup style in theme
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protected string _styleId;
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/// own copy of style - to override some of style properties, null of no properties overriden
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protected Style _ownStyle;
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/// width measured by measure()
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protected int _measuredWidth;
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/// height measured by measure()
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protected int _measuredHeight;
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/// true to force layout
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protected bool _needLayout = true;
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/// true to force redraw
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protected bool _needDraw = true;
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/// parent widget
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protected Widget _parent;
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/// window (to be used for top level widgets only!)
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protected Window _window;
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this(string ID = null) {
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_id = id;
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}
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/// accessor to style - by lookup in theme by styleId (if style id is not set, theme base style will be used).
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protected @property const (Style) style() const {
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if (_ownStyle !is null)
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return _ownStyle;
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return currentTheme.get(_styleId);
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}
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/// enforces widget's own style - allows override some of style properties
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protected @property Style ownStyle() {
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if (_ownStyle is null)
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_ownStyle = currentTheme.modifyStyle(_styleId);
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return _ownStyle;
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}
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/// returns widget id, null if not set
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@property string id() const { return _styleId; }
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/// set widget id
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@property void id(string id) { _id = id; }
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/// compare widget id with specified value, returs true if matches
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bool compareId(string id) { return (_id !is null) && id.equal(_id); }
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//======================================================
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// Style related properties
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/// returns widget style id, null if not set
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@property string styleId() const { return _styleId; }
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/// set widget style id
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@property void styleId(string id) { _styleId = id; }
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/// get margins (between widget bounds and its background)
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@property Rect margins() const { return style.margins; }
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/// set margins for widget - override one from style
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@property Widget margins(Rect rc) { ownStyle.margins = rc; return this; }
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/// get padding (between background bounds and content of widget)
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@property Rect padding() const {
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// get max padding from style padding and background drawable padding
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Rect p = style.padding;
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Rect dp = style.backgroundDrawable.padding;
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if (p.left < dp.left)
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p.left = dp.left;
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if (p.right < dp.right)
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p.right = dp.right;
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if (p.top < dp.top)
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p.top = dp.top;
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if (p.bottom < dp.bottom)
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p.bottom = dp.bottom;
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return p;
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}
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/// set padding for widget - override one from style
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@property Widget padding(Rect rc) { ownStyle.padding = rc; return this; }
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/// returns background color
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@property uint backgroundColor() const { return style.backgroundColor; }
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/// set background color for widget - override one from style
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@property Widget backgroundColor(uint color) { ownStyle.backgroundColor = color; return this; }
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/// get text color (ARGB 32 bit value)
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@property uint textColor() const { return style.textColor; }
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/// set text color (ARGB 32 bit value)
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@property Widget textColor(uint value) { ownStyle.textColor = value; return this; }
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/// returns font face
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@property string fontFace() const { return style.fontFace; }
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/// set font face for widget - override one from style
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@property Widget fontFace(string face) { ownStyle.fontFace = face; return this; }
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/// returns font style (italic/normal)
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@property bool fontItalic() const { return style.fontItalic; }
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/// set font style (italic/normal) for widget - override one from style
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@property Widget fontItalic(bool italic) { ownStyle.fontStyle = italic ? FONT_STYLE_ITALIC : FONT_STYLE_NORMAL; return this; }
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/// returns font weight
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@property ushort fontWeight() const { return style.fontWeight; }
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/// set font weight for widget - override one from style
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@property Widget fontWeight(ushort weight) { ownStyle.fontWeight = weight; return this; }
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/// returns font size in pixels
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@property ushort fontSize() const { return style.fontSize; }
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/// set font size for widget - override one from style
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@property Widget fontSize(ushort size) { ownStyle.fontSize = size; return this; }
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/// returns font family
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@property FontFamily fontFamily() const { return style.fontFamily; }
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/// set font family for widget - override one from style
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@property Widget fontFamily(FontFamily family) { ownStyle.fontFamily = family; return this; }
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/// returns alignment (combined vertical and horizontal)
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@property ubyte alignment() const { return style.alignment; }
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/// sets alignment (combined vertical and horizontal)
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@property Widget alignment(ubyte value) { ownStyle.alignment = value; return this; }
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/// returns horizontal alignment
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@property Align valign() { return cast(Align)(alignment & Align.VCenter); }
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/// returns vertical alignment
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@property Align halign() { return cast(Align)(alignment & Align.HCenter); }
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/// returns font set for widget using style or set manually
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@property FontRef font() const { return style.font; }
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/// returns widget content text (override to support this)
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@property dstring text() { return ""; }
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/// sets widget content text (override to support this)
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@property Widget text(dstring s) { return this; }
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//==================================================================
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// Layout and drawing related methods
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/// returns true if layout is required for widget and its children
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@property bool needLayout() { return _needLayout; }
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/// returns true if redraw is required for widget and its children
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@property bool needDraw() { return _needDraw; }
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/// returns measured width (calculated during measure() call)
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@property measuredWidth() { return _measuredWidth; }
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/// returns measured height (calculated during measure() call)
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@property measuredHeight() { return _measuredHeight; }
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/// returns current width of widget in pixels
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@property int width() { return _pos.width; }
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/// returns current height of widget in pixels
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@property int height() { return _pos.height; }
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/// returns min width constraint
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@property int minWidth() { return style.minWidth; }
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/// returns max width constraint (SIZE_UNSPECIFIED if no constraint set)
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@property int maxWidth() { return style.maxWidth; }
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/// returns min height constraint
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@property int minHeight() { return style.minHeight; }
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/// returns max height constraint (SIZE_UNSPECIFIED if no constraint set)
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@property int maxHeight() { return style.maxHeight; }
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/// set max width constraint (SIZE_UNSPECIFIED for no constraint)
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@property Widget maxWidth(int value) { ownStyle.maxWidth = value; return this; }
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/// set max width constraint (0 for no constraint)
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@property Widget minWidth(int value) { ownStyle.minWidth = value; return this; }
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/// set max height constraint (SIZE_UNSPECIFIED for no constraint)
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@property Widget maxHeight(int value) { ownStyle.maxHeight = value; return this; }
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/// set max height constraint (0 for no constraint)
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@property Widget minHeight(int value) { ownStyle.minHeight = value; return this; }
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/// returns layout width options (WRAP_CONTENT, FILL_PARENT, or some constant value)
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@property int layoutWidth() { return style.layoutWidth; }
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/// returns layout height options (WRAP_CONTENT, FILL_PARENT, or some constant value)
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@property int layoutHeight() { return style.layoutHeight; }
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/// returns layout weight (while resizing to fill parent, widget will be resized proportionally to this value)
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@property int layoutWeight() { return style.layoutWeight; }
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/// sets layout width options (WRAP_CONTENT, FILL_PARENT, or some constant value)
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@property Widget layoutWidth(int value) { ownStyle.layoutWidth = value; return this; }
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/// sets layout height options (WRAP_CONTENT, FILL_PARENT, or some constant value)
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@property Widget layoutHeight(int value) { ownStyle.layoutHeight = value; return this; }
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/// sets layout weight (while resizing to fill parent, widget will be resized proportionally to this value)
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@property Widget layoutWeight(int value) { ownStyle.layoutWeight = value; return this; }
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/// returns widget visibility (Visible, Invisible, Gone)
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@property Visibility visibility() { return _visibility; }
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/// sets widget visibility (Visible, Invisible, Gone)
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@property Widget visibility(Visibility visible) {
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_visibility = visible;
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requestLayout();
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return this;
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}
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/// request relayout of widget and its children
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void requestLayout() {
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_needLayout = true;
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}
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/// request redraw
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void invalidate() {
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_needDraw = true;
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}
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/// helper function for implement measure() when widget's content dimensions are known
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protected void measuredContent(int parentWidth, int parentHeight, int contentWidth, int contentHeight) {
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if (visibility == Visibility.Gone) {
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_measuredWidth = _measuredHeight = 0;
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return;
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}
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Rect m = margins;
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Rect p = padding;
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// summarize margins, padding, and content size
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int dx = m.left + m.right + p.left + p.right + contentWidth;
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int dy = m.top + m.bottom + p.top + p.bottom + contentHeight;
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// apply min/max width and height constraints
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int minw = minWidth;
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int maxw = maxWidth;
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int minh = minHeight;
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int maxh = maxHeight;
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if (dx < minw)
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dx = minw;
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if (dy < minh)
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dy = minh;
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if (maxw != SIZE_UNSPECIFIED && dx > maxw)
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dx = maxw;
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if (maxh != SIZE_UNSPECIFIED && dy > maxh)
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dy = maxh;
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// apply max parent size constraint
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if (parentWidth != SIZE_UNSPECIFIED && dx > parentWidth)
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dx = parentWidth;
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if (parentHeight != SIZE_UNSPECIFIED && dy > parentHeight)
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dy = parentHeight;
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_measuredWidth = dx;
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_measuredHeight = dy;
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}
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/// Measure widget according to desired width and height constraints. (Step 1 of two phase layout).
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void measure(int parentWidth, int parentHeight) {
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measuredContent(parentWidth, parentHeight, 0, 0);
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}
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/// Set widget rectangle to specified value and layout widget contents. (Step 2 of two phase layout).
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void layout(Rect rc) {
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if (visibility == Visibility.Gone) {
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return;
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}
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_pos = rc;
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_needLayout = false;
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}
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/// Draw widget at its position to buffer
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void onDraw(DrawBuf buf) {
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if (visibility != Visibility.Visible)
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return;
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Rect rc = _pos;
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applyMargins(rc);
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DrawableRef bg = style.backgroundDrawable;
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bg.drawTo(buf, rc);
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applyPadding(rc);
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_needDraw = false;
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}
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/// Helper function: applies margins to rectangle
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void applyMargins(ref Rect rc) {
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Rect m = margins;
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rc.left += m.left;
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rc.top += m.top;
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rc.bottom -= m.bottom;
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rc.right -= m.right;
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}
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/// Helper function: applies padding to rectangle
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void applyPadding(ref Rect rc) {
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Rect m = padding;
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rc.left += m.left;
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rc.top += m.top;
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rc.bottom -= m.bottom;
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rc.right -= m.right;
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}
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/// Applies alignment for content of size sz - set rectangle rc to aligned value of content inside of initial value of rc.
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void applyAlign(ref Rect rc, Point sz) {
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Align va = valign;
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Align ha = halign;
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if (va == Align.Bottom) {
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rc.top = rc.bottom - sz.y;
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} else if (va == Align.VCenter) {
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int dy = (rc.height - sz.y) / 2;
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rc.top += dy;
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rc.bottom = rc.top + sz.y;
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} else {
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rc.bottom = rc.top + sz.y;
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}
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if (ha == Align.Right) {
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rc.left = rc.right - sz.x;
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} else if (ha == Align.HCenter) {
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int dx = (rc.width - sz.x) / 2;
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rc.left += dx;
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rc.right = rc.left + sz.x;
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} else {
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rc.right = rc.left + sz.x;
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}
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}
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// ===========================================================
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// Widget hierarhy methods
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/// returns number of children of this widget
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@property int childCount() { return 0; }
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/// returns child by index
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Widget child(int index) { return null; }
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/// adds child, returns added item
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Widget addChild(Widget item) { assert(false, "children not suported for this widget type"); }
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/// removes child, returns added item
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Widget removeChild(int index) { assert(false, "children not suported for this widget type"); }
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/// returns index of widget in child list, -1 if passed widget is not a child of this widget
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int childIndex(Widget item) { return -1; }
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/// find child by id, returns null if not found
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Widget childById(string id) {
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if (compareId(id))
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return this;
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// lookup children
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for (int i = childCount - 1; i >= 0; i--) {
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Widget res = child(i).childById(id);
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if (res !is null)
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return res;
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}
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// not found
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return null;
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}
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/// returns parent widget, null for top level widget
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@property Widget parent() { return _parent; }
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/// sets parent for widget
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@property void parent(Widget parent) { _parent = parent; }
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/// returns window (if widget or its parent is attached to window)
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@property Window window() {
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Widget p = this;
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while (p !is null) {
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if (p._window !is null)
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return p._window;
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p = p.parent;
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}
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return null;
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}
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/// sets window (to be used for top level widget from Window implementation). TODO: hide it from API?
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@property void window(Window window) { _window = window; }
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}
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/// widget list holder
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struct WidgetList {
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protected Widget[] _list;
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protected int _count;
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/// returns count of items
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@property int count() { return _count; }
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/// get item by index
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Widget get(int index) {
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assert(index >= 0 && index < _count, "child index out of range");
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return _list[index];
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}
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/// add item to list
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Widget add(Widget item) {
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if (_list.length <= _count) // resize
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_list.length = _list.length < 4 ? 4 : _list.length * 2;
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_list[_count++] = item;
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return item;
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}
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/// find child index for item, return -1 if not found
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int indexOf(Widget item) {
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for (int i = 0; i < _count; i++)
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if (_list[i] == item)
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return i;
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return -1;
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}
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/// remove item from list, return removed item
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Widget remove(int index) {
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assert(index >= 0 && index < _count, "child index out of range");
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Widget item = _list[index];
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for (int i = index; i < _count - 1; i++)
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_list[i] = _list[i + 1];
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_count--;
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return item;
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}
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/// remove and destroy all items
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void clear() {
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for (int i = 0; i < _count; i++) {
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destroy(_list[i]);
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_list[i] = null;
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}
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_count = 0;
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}
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~this() {
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clear();
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}
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}
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/// base class for widgets which have children
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class WidgetGroup : Widget {
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this(string ID = null) {
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super(ID);
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}
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protected WidgetList _children;
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/// returns number of children of this widget
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@property override int childCount() { return _children.count; }
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/// returns child by index
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override Widget child(int index) { return _children.get(index); }
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/// adds child, returns added item
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override Widget addChild(Widget item) { return _children.add(item); }
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/// removes child, returns added item
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override Widget removeChild(int index) { return _children.remove(index); }
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/// returns index of widget in child list, -1 if passed widget is not a child of this widget
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override int childIndex(Widget item) { return _children.indexOf(item); }
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}
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module dlangui.widgets.widget;
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public import dlangui.core.types;
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public import dlangui.widgets.styles;
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public import dlangui.graphics.drawbuf;
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public import dlangui.graphics.images;
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public import dlangui.graphics.fonts;
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import dlangui.platforms.common.platform;
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import std.algorithm;
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/// Visibility (see Android View Visibility)
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enum Visibility : ubyte {
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/// Visible on screen (default)
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Visible,
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/// Not visible, but occupies a space in layout
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Invisible,
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/// Completely hidden, as not has been added
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Gone
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}
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class Widget {
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/// widget id
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protected string _id;
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/// current widget position, set by layout()
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protected Rect _pos;
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/// widget visibility: either Visible, Invisible, Gone
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protected Visibility _visibility = Visibility.Visible; // visible by default
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/// style id to lookup style in theme
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protected string _styleId;
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/// own copy of style - to override some of style properties, null of no properties overriden
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protected Style _ownStyle;
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/// width measured by measure()
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protected int _measuredWidth;
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/// height measured by measure()
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protected int _measuredHeight;
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/// true to force layout
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protected bool _needLayout = true;
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/// true to force redraw
|
||||
protected bool _needDraw = true;
|
||||
/// parent widget
|
||||
protected Widget _parent;
|
||||
/// window (to be used for top level widgets only!)
|
||||
protected Window _window;
|
||||
|
||||
this(string ID = null) {
|
||||
_id = id;
|
||||
}
|
||||
|
||||
/// accessor to style - by lookup in theme by styleId (if style id is not set, theme base style will be used).
|
||||
protected @property const (Style) style() const {
|
||||
if (_ownStyle !is null)
|
||||
return _ownStyle;
|
||||
return currentTheme.get(_styleId);
|
||||
}
|
||||
/// enforces widget's own style - allows override some of style properties
|
||||
protected @property Style ownStyle() {
|
||||
if (_ownStyle is null)
|
||||
_ownStyle = currentTheme.modifyStyle(_styleId);
|
||||
return _ownStyle;
|
||||
}
|
||||
|
||||
/// returns widget id, null if not set
|
||||
@property string id() const { return _styleId; }
|
||||
/// set widget id
|
||||
@property void id(string id) { _id = id; }
|
||||
/// compare widget id with specified value, returs true if matches
|
||||
bool compareId(string id) { return (_id !is null) && id.equal(_id); }
|
||||
|
||||
//======================================================
|
||||
// Style related properties
|
||||
|
||||
/// returns widget style id, null if not set
|
||||
@property string styleId() const { return _styleId; }
|
||||
/// set widget style id
|
||||
@property void styleId(string id) { _styleId = id; }
|
||||
/// get margins (between widget bounds and its background)
|
||||
@property Rect margins() const { return style.margins; }
|
||||
/// set margins for widget - override one from style
|
||||
@property Widget margins(Rect rc) { ownStyle.margins = rc; return this; }
|
||||
/// get padding (between background bounds and content of widget)
|
||||
@property Rect padding() const {
|
||||
// get max padding from style padding and background drawable padding
|
||||
Rect p = style.padding;
|
||||
DrawableRef d = style.backgroundDrawable;
|
||||
if (!d.isNull) {
|
||||
Rect dp = style.backgroundDrawable.padding;
|
||||
if (p.left < dp.left)
|
||||
p.left = dp.left;
|
||||
if (p.right < dp.right)
|
||||
p.right = dp.right;
|
||||
if (p.top < dp.top)
|
||||
p.top = dp.top;
|
||||
if (p.bottom < dp.bottom)
|
||||
p.bottom = dp.bottom;
|
||||
}
|
||||
return p;
|
||||
}
|
||||
/// set padding for widget - override one from style
|
||||
@property Widget padding(Rect rc) { ownStyle.padding = rc; return this; }
|
||||
/// returns background color
|
||||
@property uint backgroundColor() const { return style.backgroundColor; }
|
||||
/// set background color for widget - override one from style
|
||||
@property Widget backgroundColor(uint color) { ownStyle.backgroundColor = color; return this; }
|
||||
/// get text color (ARGB 32 bit value)
|
||||
@property uint textColor() const { return style.textColor; }
|
||||
/// set text color (ARGB 32 bit value)
|
||||
@property Widget textColor(uint value) { ownStyle.textColor = value; return this; }
|
||||
/// returns font face
|
||||
@property string fontFace() const { return style.fontFace; }
|
||||
/// set font face for widget - override one from style
|
||||
@property Widget fontFace(string face) { ownStyle.fontFace = face; return this; }
|
||||
/// returns font style (italic/normal)
|
||||
@property bool fontItalic() const { return style.fontItalic; }
|
||||
/// set font style (italic/normal) for widget - override one from style
|
||||
@property Widget fontItalic(bool italic) { ownStyle.fontStyle = italic ? FONT_STYLE_ITALIC : FONT_STYLE_NORMAL; return this; }
|
||||
/// returns font weight
|
||||
@property ushort fontWeight() const { return style.fontWeight; }
|
||||
/// set font weight for widget - override one from style
|
||||
@property Widget fontWeight(ushort weight) { ownStyle.fontWeight = weight; return this; }
|
||||
/// returns font size in pixels
|
||||
@property ushort fontSize() const { return style.fontSize; }
|
||||
/// set font size for widget - override one from style
|
||||
@property Widget fontSize(ushort size) { ownStyle.fontSize = size; return this; }
|
||||
/// returns font family
|
||||
@property FontFamily fontFamily() const { return style.fontFamily; }
|
||||
/// set font family for widget - override one from style
|
||||
@property Widget fontFamily(FontFamily family) { ownStyle.fontFamily = family; return this; }
|
||||
/// returns alignment (combined vertical and horizontal)
|
||||
@property ubyte alignment() const { return style.alignment; }
|
||||
/// sets alignment (combined vertical and horizontal)
|
||||
@property Widget alignment(ubyte value) { ownStyle.alignment = value; return this; }
|
||||
/// returns horizontal alignment
|
||||
@property Align valign() { return cast(Align)(alignment & Align.VCenter); }
|
||||
/// returns vertical alignment
|
||||
@property Align halign() { return cast(Align)(alignment & Align.HCenter); }
|
||||
/// returns font set for widget using style or set manually
|
||||
@property FontRef font() const { return style.font; }
|
||||
|
||||
/// returns widget content text (override to support this)
|
||||
@property dstring text() { return ""; }
|
||||
/// sets widget content text (override to support this)
|
||||
@property Widget text(dstring s) { return this; }
|
||||
|
||||
//==================================================================
|
||||
// Layout and drawing related methods
|
||||
|
||||
/// returns true if layout is required for widget and its children
|
||||
@property bool needLayout() { return _needLayout; }
|
||||
/// returns true if redraw is required for widget and its children
|
||||
@property bool needDraw() { return _needDraw; }
|
||||
/// returns measured width (calculated during measure() call)
|
||||
@property measuredWidth() { return _measuredWidth; }
|
||||
/// returns measured height (calculated during measure() call)
|
||||
@property measuredHeight() { return _measuredHeight; }
|
||||
/// returns current width of widget in pixels
|
||||
@property int width() { return _pos.width; }
|
||||
/// returns current height of widget in pixels
|
||||
@property int height() { return _pos.height; }
|
||||
/// returns min width constraint
|
||||
@property int minWidth() { return style.minWidth; }
|
||||
/// returns max width constraint (SIZE_UNSPECIFIED if no constraint set)
|
||||
@property int maxWidth() { return style.maxWidth; }
|
||||
/// returns min height constraint
|
||||
@property int minHeight() { return style.minHeight; }
|
||||
/// returns max height constraint (SIZE_UNSPECIFIED if no constraint set)
|
||||
@property int maxHeight() { return style.maxHeight; }
|
||||
|
||||
/// set max width constraint (SIZE_UNSPECIFIED for no constraint)
|
||||
@property Widget maxWidth(int value) { ownStyle.maxWidth = value; return this; }
|
||||
/// set max width constraint (0 for no constraint)
|
||||
@property Widget minWidth(int value) { ownStyle.minWidth = value; return this; }
|
||||
/// set max height constraint (SIZE_UNSPECIFIED for no constraint)
|
||||
@property Widget maxHeight(int value) { ownStyle.maxHeight = value; return this; }
|
||||
/// set max height constraint (0 for no constraint)
|
||||
@property Widget minHeight(int value) { ownStyle.minHeight = value; return this; }
|
||||
|
||||
/// returns layout width options (WRAP_CONTENT, FILL_PARENT, or some constant value)
|
||||
@property int layoutWidth() { return style.layoutWidth; }
|
||||
/// returns layout height options (WRAP_CONTENT, FILL_PARENT, or some constant value)
|
||||
@property int layoutHeight() { return style.layoutHeight; }
|
||||
/// returns layout weight (while resizing to fill parent, widget will be resized proportionally to this value)
|
||||
@property int layoutWeight() { return style.layoutWeight; }
|
||||
|
||||
/// sets layout width options (WRAP_CONTENT, FILL_PARENT, or some constant value)
|
||||
@property Widget layoutWidth(int value) { ownStyle.layoutWidth = value; return this; }
|
||||
/// sets layout height options (WRAP_CONTENT, FILL_PARENT, or some constant value)
|
||||
@property Widget layoutHeight(int value) { ownStyle.layoutHeight = value; return this; }
|
||||
/// sets layout weight (while resizing to fill parent, widget will be resized proportionally to this value)
|
||||
@property Widget layoutWeight(int value) { ownStyle.layoutWeight = value; return this; }
|
||||
|
||||
/// returns widget visibility (Visible, Invisible, Gone)
|
||||
@property Visibility visibility() { return _visibility; }
|
||||
/// sets widget visibility (Visible, Invisible, Gone)
|
||||
@property Widget visibility(Visibility visible) {
|
||||
_visibility = visible;
|
||||
requestLayout();
|
||||
return this;
|
||||
}
|
||||
|
||||
/// request relayout of widget and its children
|
||||
void requestLayout() {
|
||||
_needLayout = true;
|
||||
}
|
||||
/// request redraw
|
||||
void invalidate() {
|
||||
_needDraw = true;
|
||||
}
|
||||
|
||||
/// helper function for implement measure() when widget's content dimensions are known
|
||||
protected void measuredContent(int parentWidth, int parentHeight, int contentWidth, int contentHeight) {
|
||||
if (visibility == Visibility.Gone) {
|
||||
_measuredWidth = _measuredHeight = 0;
|
||||
return;
|
||||
}
|
||||
Rect m = margins;
|
||||
Rect p = padding;
|
||||
// summarize margins, padding, and content size
|
||||
int dx = m.left + m.right + p.left + p.right + contentWidth;
|
||||
int dy = m.top + m.bottom + p.top + p.bottom + contentHeight;
|
||||
// apply min/max width and height constraints
|
||||
int minw = minWidth;
|
||||
int maxw = maxWidth;
|
||||
int minh = minHeight;
|
||||
int maxh = maxHeight;
|
||||
if (dx < minw)
|
||||
dx = minw;
|
||||
if (dy < minh)
|
||||
dy = minh;
|
||||
if (maxw != SIZE_UNSPECIFIED && dx > maxw)
|
||||
dx = maxw;
|
||||
if (maxh != SIZE_UNSPECIFIED && dy > maxh)
|
||||
dy = maxh;
|
||||
// apply max parent size constraint
|
||||
if (parentWidth != SIZE_UNSPECIFIED && dx > parentWidth)
|
||||
dx = parentWidth;
|
||||
if (parentHeight != SIZE_UNSPECIFIED && dy > parentHeight)
|
||||
dy = parentHeight;
|
||||
_measuredWidth = dx;
|
||||
_measuredHeight = dy;
|
||||
}
|
||||
|
||||
/// Measure widget according to desired width and height constraints. (Step 1 of two phase layout).
|
||||
void measure(int parentWidth, int parentHeight) {
|
||||
measuredContent(parentWidth, parentHeight, 0, 0);
|
||||
}
|
||||
|
||||
/// Set widget rectangle to specified value and layout widget contents. (Step 2 of two phase layout).
|
||||
void layout(Rect rc) {
|
||||
if (visibility == Visibility.Gone) {
|
||||
return;
|
||||
}
|
||||
_pos = rc;
|
||||
_needLayout = false;
|
||||
}
|
||||
/// Draw widget at its position to buffer
|
||||
void onDraw(DrawBuf buf) {
|
||||
if (visibility != Visibility.Visible)
|
||||
return;
|
||||
Rect rc = _pos;
|
||||
applyMargins(rc);
|
||||
DrawableRef bg = style.backgroundDrawable;
|
||||
if (!bg.isNull) {
|
||||
bg.drawTo(buf, rc);
|
||||
}
|
||||
applyPadding(rc);
|
||||
_needDraw = false;
|
||||
}
|
||||
|
||||
/// Helper function: applies margins to rectangle
|
||||
void applyMargins(ref Rect rc) {
|
||||
Rect m = margins;
|
||||
rc.left += m.left;
|
||||
rc.top += m.top;
|
||||
rc.bottom -= m.bottom;
|
||||
rc.right -= m.right;
|
||||
}
|
||||
/// Helper function: applies padding to rectangle
|
||||
void applyPadding(ref Rect rc) {
|
||||
Rect m = padding;
|
||||
rc.left += m.left;
|
||||
rc.top += m.top;
|
||||
rc.bottom -= m.bottom;
|
||||
rc.right -= m.right;
|
||||
}
|
||||
/// Applies alignment for content of size sz - set rectangle rc to aligned value of content inside of initial value of rc.
|
||||
void applyAlign(ref Rect rc, Point sz) {
|
||||
Align va = valign;
|
||||
Align ha = halign;
|
||||
if (va == Align.Bottom) {
|
||||
rc.top = rc.bottom - sz.y;
|
||||
} else if (va == Align.VCenter) {
|
||||
int dy = (rc.height - sz.y) / 2;
|
||||
rc.top += dy;
|
||||
rc.bottom = rc.top + sz.y;
|
||||
} else {
|
||||
rc.bottom = rc.top + sz.y;
|
||||
}
|
||||
if (ha == Align.Right) {
|
||||
rc.left = rc.right - sz.x;
|
||||
} else if (ha == Align.HCenter) {
|
||||
int dx = (rc.width - sz.x) / 2;
|
||||
rc.left += dx;
|
||||
rc.right = rc.left + sz.x;
|
||||
} else {
|
||||
rc.right = rc.left + sz.x;
|
||||
}
|
||||
}
|
||||
|
||||
// ===========================================================
|
||||
// Widget hierarhy methods
|
||||
|
||||
/// returns number of children of this widget
|
||||
@property int childCount() { return 0; }
|
||||
/// returns child by index
|
||||
Widget child(int index) { return null; }
|
||||
/// adds child, returns added item
|
||||
Widget addChild(Widget item) { assert(false, "children not suported for this widget type"); }
|
||||
/// removes child, returns added item
|
||||
Widget removeChild(int index) { assert(false, "children not suported for this widget type"); }
|
||||
/// returns index of widget in child list, -1 if passed widget is not a child of this widget
|
||||
int childIndex(Widget item) { return -1; }
|
||||
|
||||
/// find child by id, returns null if not found
|
||||
Widget childById(string id) {
|
||||
if (compareId(id))
|
||||
return this;
|
||||
// lookup children
|
||||
for (int i = childCount - 1; i >= 0; i--) {
|
||||
Widget res = child(i).childById(id);
|
||||
if (res !is null)
|
||||
return res;
|
||||
}
|
||||
// not found
|
||||
return null;
|
||||
}
|
||||
/// returns parent widget, null for top level widget
|
||||
@property Widget parent() { return _parent; }
|
||||
/// sets parent for widget
|
||||
@property void parent(Widget parent) { _parent = parent; }
|
||||
/// returns window (if widget or its parent is attached to window)
|
||||
@property Window window() {
|
||||
Widget p = this;
|
||||
while (p !is null) {
|
||||
if (p._window !is null)
|
||||
return p._window;
|
||||
p = p.parent;
|
||||
}
|
||||
return null;
|
||||
}
|
||||
/// sets window (to be used for top level widget from Window implementation). TODO: hide it from API?
|
||||
@property void window(Window window) { _window = window; }
|
||||
|
||||
}
|
||||
|
||||
/// widget list holder
|
||||
struct WidgetList {
|
||||
protected Widget[] _list;
|
||||
protected int _count;
|
||||
/// returns count of items
|
||||
@property int count() { return _count; }
|
||||
/// get item by index
|
||||
Widget get(int index) {
|
||||
assert(index >= 0 && index < _count, "child index out of range");
|
||||
return _list[index];
|
||||
}
|
||||
/// add item to list
|
||||
Widget add(Widget item) {
|
||||
if (_list.length <= _count) // resize
|
||||
_list.length = _list.length < 4 ? 4 : _list.length * 2;
|
||||
_list[_count++] = item;
|
||||
return item;
|
||||
}
|
||||
/// find child index for item, return -1 if not found
|
||||
int indexOf(Widget item) {
|
||||
for (int i = 0; i < _count; i++)
|
||||
if (_list[i] == item)
|
||||
return i;
|
||||
return -1;
|
||||
}
|
||||
/// remove item from list, return removed item
|
||||
Widget remove(int index) {
|
||||
assert(index >= 0 && index < _count, "child index out of range");
|
||||
Widget item = _list[index];
|
||||
for (int i = index; i < _count - 1; i++)
|
||||
_list[i] = _list[i + 1];
|
||||
_count--;
|
||||
return item;
|
||||
}
|
||||
/// remove and destroy all items
|
||||
void clear() {
|
||||
for (int i = 0; i < _count; i++) {
|
||||
destroy(_list[i]);
|
||||
_list[i] = null;
|
||||
}
|
||||
_count = 0;
|
||||
}
|
||||
~this() {
|
||||
clear();
|
||||
}
|
||||
}
|
||||
|
||||
/// base class for widgets which have children
|
||||
class WidgetGroup : Widget {
|
||||
|
||||
this(string ID = null) {
|
||||
super(ID);
|
||||
}
|
||||
|
||||
protected WidgetList _children;
|
||||
|
||||
/// returns number of children of this widget
|
||||
@property override int childCount() { return _children.count; }
|
||||
/// returns child by index
|
||||
override Widget child(int index) { return _children.get(index); }
|
||||
/// adds child, returns added item
|
||||
override Widget addChild(Widget item) { return _children.add(item); }
|
||||
/// removes child, returns added item
|
||||
override Widget removeChild(int index) { return _children.remove(index); }
|
||||
/// returns index of widget in child list, -1 if passed widget is not a child of this widget
|
||||
override int childIndex(Widget item) { return _children.indexOf(item); }
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue