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apply size constraints

This commit is contained in:
Vadim Lopatin 2014-03-07 16:45:04 +04:00
parent a729ab4e58
commit 72d698f72a
1 changed files with 48 additions and 7 deletions
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55
src/dlangui/widgets/widget.d
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@ -144,6 +144,23 @@ class Widget {
@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 widget visibility (Visible, Invisible, Gone)
@property Visibility visibility() { return _visibility; }
@ -176,9 +193,23 @@ class Widget {
}
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;
// check for margins and padding
// 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)
@ -301,18 +332,28 @@ class Widget {
}
/// static text widget
class TextWidget : Widget {
protected dstring _text;
/// get widget text
override @property dstring text() { return _text; }
override @property void text(dstring s) { _text = s; }
override void measure(int width, int height) {
_measuredWidth = _measuredHeight = 0;
/// set text to show
override @property void text(dstring s) {
_text = s;
requestLayout();
}
override void layout(Rect rc) {
_pos = rc;
_needLayout = false;
override void measure(int parentWidth, int parentHeight) {
_measuredWidth = _measuredHeight = 0;
FontRef font = font();
Point sz = font.textSize(text);
measuredContent(parentWidth, parentHeight, sz.x, sz.y);
}
override void layout(Rect rc) {
super.layout(rc);
}
override void onDraw(DrawBuf buf) {
if (visibility != Visibility.Visible)
return;
super.onDraw(buf);
Rect rc = _pos;
applyMargins(rc);