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EditBox: scrolling using mouse wheel and scrollbars; font zooming using ctrl + mouse wheel

This commit is contained in:
Vadim Lopatin 2014-04-24 17:30:19 +04:00
parent 354095fa8f
commit 7862f897f9
3 changed files with 216 additions and 8 deletions
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2
examples/example1/src/main.d
View File

@ -186,12 +186,14 @@ extern (C) int UIAppMain(string[] args) {
text ~= " The quick brown fox jumps over the lazy dog.";
}
editBox.text = text;
editBox.minFontSize(12).maxFontSize(75);
editors.addChild(createEditorSettingsControl(editBox));
editors.addChild(editBox);
editors.addChild(new TextWidget(null, "EditBox: additional view for the same content (split view testing)"d));
EditBox editBox2 = new EditBox("editbox2", ""d);
editBox2.content = editBox.content; // view the same content as first editbox
editBox2.minFontSize(12).maxFontSize(75);
editors.addChild(editBox2);
editors.layoutHeight(FILL_PARENT).layoutWidth(FILL_PARENT);

3
src/dlangui/core/events.d
View File

@ -36,6 +36,9 @@ class Action {
protected UIString _label;
protected string _iconId;
protected Accelerator[] _accelerators;
this(int id) {
_id = id;
}
this(int id, string labelResourceId, string iconResourceId = null) {
_id = id;
_label = labelResourceId;

219
src/dlangui/widgets/editors.d
View File

@ -274,6 +274,16 @@ class EditableContent {
protected UndoBuffer _undoBuffer;
protected bool _readOnly;
@property bool readOnly() {
return _readOnly;
}
@property void readOnly(bool readOnly) {
_readOnly = readOnly;
}
/// listeners for edit operations
Signal!EditableContentListener contentChangeListeners;
@ -417,7 +427,10 @@ class EditableContent {
}
}
/// edit content
bool performOperation(EditOperation op, Object source) {
if (_readOnly)
throw new Exception("content is readonly");
if (op.action == EditAction.Replace) {
TextRange rangeBefore = op.range;
dstring[] oldcontent = rangeText(rangeBefore);
@ -456,6 +469,8 @@ class EditableContent {
bool undo() {
if (!hasUndo)
return false;
if (_readOnly)
throw new Exception("content is readonly");
EditOperation op = _undoBuffer.undo();
TextRange rangeBefore = op.newRange;
dstring[] oldcontent = op.content;
@ -470,6 +485,8 @@ class EditableContent {
bool redo() {
if (!hasUndo)
return false;
if (_readOnly)
throw new Exception("content is readonly");
EditOperation op = _undoBuffer.redo();
TextRange rangeBefore = op.range;
dstring[] oldcontent = op.oldContent;
@ -580,6 +597,27 @@ enum EditorActions {
/// Select whole content (usually, Ctrl+A)
SelectAll,
// Scroll operations
/// Scroll one line up (not changing cursor)
ScrollLineUp,
/// Scroll one line down (not changing cursor)
ScrollLineDown,
/// Scroll one page up (not changing cursor)
ScrollPageUp,
/// Scroll one page down (not changing cursor)
ScrollPageDown,
/// Scroll window left
ScrollLeft,
/// Scroll window right
ScrollRight,
/// Zoom in editor font
ZoomIn,
/// Zoom out editor font
ZoomOut,
}
/// base for all editor widgets
@ -593,6 +631,9 @@ class EditWidgetBase : WidgetGroup, EditableContentListener {
protected int _spaceWidth;
protected int _tabSize = 4;
protected int _minFontSize = -1; // disable zooming
protected int _maxFontSize = -1; // disable zooming
protected bool _wantTabs = true;
protected bool _useSpacesForTabs = false;
@ -684,7 +725,7 @@ class EditWidgetBase : WidgetGroup, EditableContentListener {
/// readonly flag (when true, user cannot change content of editor)
@property bool readOnly() {
return !enabled;
return !enabled || _content.readOnly;
}
/// sets readonly flag
@ -756,6 +797,8 @@ class EditWidgetBase : WidgetGroup, EditableContentListener {
_content = content;
_ownContent = false;
_content.contentChangeListeners.connect(this);
if (_content.readOnly)
enabled = false;
return this;
}
@ -1348,6 +1391,22 @@ class EditWidgetBase : WidgetGroup, EditableContentListener {
if (event.action == MouseAction.FocusIn) {
return true;
}
if (event.action == MouseAction.Wheel) {
uint keyFlags = event.flags & (MouseFlag.Shift | MouseFlag.Control | MouseFlag.Alt);
if (event.wheelDelta < 0) {
if (keyFlags == MouseFlag.Shift)
return handleAction(new Action(EditorActions.ScrollRight));
if (keyFlags == MouseFlag.Control)
return handleAction(new Action(EditorActions.ZoomOut));
return handleAction(new Action(EditorActions.ScrollLineDown));
} else if (event.wheelDelta > 0) {
if (keyFlags == MouseFlag.Shift)
return handleAction(new Action(EditorActions.ScrollLeft));
if (keyFlags == MouseFlag.Control)
return handleAction(new Action(EditorActions.ZoomIn));
return handleAction(new Action(EditorActions.ScrollLineUp));
}
}
return false;
}
@ -1568,6 +1627,21 @@ class EditBox : EditWidgetBase, OnScrollHandler {
_maxLineWidth = maxw;
}
@property int minFontSize() {
return _minFontSize;
}
@property EditBox minFontSize(int size) {
_minFontSize = size;
return this;
}
@property int maxFontSize() {
return _maxFontSize;
}
@property EditBox maxFontSize(int size) {
_maxFontSize = size;
return this;
}
override protected Point measureVisibleText() {
Point sz;
FontRef font = font();
@ -1606,16 +1680,36 @@ class EditBox : EditWidgetBase, OnScrollHandler {
/// handle scroll event
override bool onScrollEvent(AbstractSlider source, ScrollEvent event) {
if (source.id.equal("hscrollbar")) {
if (_scrollPos.x != event.position) {
_scrollPos.x = event.position;
invalidate();
if (event.action == ScrollAction.SliderMoved || event.action == ScrollAction.SliderReleased) {
if (_scrollPos.x != event.position) {
_scrollPos.x = event.position;
invalidate();
}
} else if (event.action == ScrollAction.PageUp) {
handleAction(new Action(EditorActions.ScrollLeft));
} else if (event.action == ScrollAction.PageDown) {
handleAction(new Action(EditorActions.ScrollRight));
} else if (event.action == ScrollAction.LineUp) {
handleAction(new Action(EditorActions.ScrollLeft));
} else if (event.action == ScrollAction.LineDown) {
handleAction(new Action(EditorActions.ScrollRight));
}
return true;
} else if (source.id.equal("vscrollbar")) {
if (_firstVisibleLine != event.position) {
_firstVisibleLine = event.position;
measureVisibleText();
invalidate();
if (event.action == ScrollAction.SliderMoved || event.action == ScrollAction.SliderReleased) {
if (_firstVisibleLine != event.position) {
_firstVisibleLine = event.position;
measureVisibleText();
invalidate();
}
} else if (event.action == ScrollAction.PageUp) {
handleAction(new Action(EditorActions.ScrollPageUp));
} else if (event.action == ScrollAction.PageDown) {
handleAction(new Action(EditorActions.ScrollPageDown));
} else if (event.action == ScrollAction.LineUp) {
handleAction(new Action(EditorActions.ScrollLineUp));
} else if (event.action == ScrollAction.LineDown) {
handleAction(new Action(EditorActions.ScrollLineDown));
}
return true;
}
@ -1803,6 +1897,115 @@ class EditBox : EditWidgetBase, OnScrollHandler {
return true;
}
break;
case EditorActions.ScrollLeft:
{
if (_scrollPos.x > 0) {
int newpos = _scrollPos.x - _spaceWidth * 4;
if (newpos < 0)
newpos = 0;
_scrollPos.x = newpos;
updateScrollbars();
invalidate();
}
}
return true;
case EditorActions.ScrollRight:
{
if (_scrollPos.x < _maxLineWidth - _clientRc.width) {
int newpos = _scrollPos.x + _spaceWidth * 4;
if (newpos > _maxLineWidth - _clientRc.width)
newpos = _maxLineWidth - _clientRc.width;
_scrollPos.x = newpos;
updateScrollbars();
invalidate();
}
}
return true;
case EditorActions.ScrollLineUp:
{
if (_firstVisibleLine > 0) {
_firstVisibleLine -= 3;
if (_firstVisibleLine < 0)
_firstVisibleLine = 0;
measureVisibleText();
updateScrollbars();
invalidate();
}
}
return true;
case EditorActions.ScrollPageUp:
{
int fullLines = _clientRc.height / _lineHeight;
if (_firstVisibleLine > 0) {
_firstVisibleLine -= fullLines * 3 / 4;
if (_firstVisibleLine < 0)
_firstVisibleLine = 0;
measureVisibleText();
updateScrollbars();
invalidate();
}
}
return true;
case EditorActions.ScrollLineDown:
{
int fullLines = _clientRc.height / _lineHeight;
if (_firstVisibleLine + fullLines < _content.length) {
_firstVisibleLine += 3;
if (_firstVisibleLine > _content.length - fullLines)
_firstVisibleLine = _content.length - fullLines;
if (_firstVisibleLine < 0)
_firstVisibleLine = 0;
measureVisibleText();
updateScrollbars();
invalidate();
}
}
return true;
case EditorActions.ScrollPageDown:
{
int fullLines = _clientRc.height / _lineHeight;
if (_firstVisibleLine + fullLines < _content.length) {
_firstVisibleLine += fullLines * 3 / 4;
if (_firstVisibleLine > _content.length - fullLines)
_firstVisibleLine = _content.length - fullLines;
if (_firstVisibleLine < 0)
_firstVisibleLine = 0;
measureVisibleText();
updateScrollbars();
invalidate();
}
}
return true;
case EditorActions.ZoomIn:
{
if (_minFontSize < _maxFontSize && _minFontSize > 10 && _maxFontSize > 10) {
int currentFontSize = fontSize;
int newFontSize = currentFontSize * 110 / 100;
if (currentFontSize != newFontSize && newFontSize <= _maxFontSize) {
fontSize = cast(ushort)newFontSize;
updateFontProps();
measureVisibleText();
updateScrollbars();
invalidate();
}
}
}
return true;
case EditorActions.ZoomOut:
{
if (_minFontSize < _maxFontSize && _minFontSize > 10 && _maxFontSize > 10) {
int currentFontSize = fontSize;
int newFontSize = currentFontSize * 100 / 110;
if (currentFontSize != newFontSize && newFontSize >= _minFontSize) {
fontSize = cast(ushort)newFontSize;
updateFontProps();
measureVisibleText();
updateScrollbars();
invalidate();
}
}
}
return true;
default:
break;
}