public static void paintOverflowIndicator(
RenderObject renderObject,
PaintingContext context,
Offset offset,
Rect containerRect,
Rect childRect,
string overflowHints = null
)
{
RelativeRect overflow = RelativeRect.fromRect(containerRect, childRect);
if (overflow.left <= 0.0f &&
overflow.right <= 0.0f &&
overflow.top <= 0.0f &&
overflow.bottom <= 0.0f)
{
return;
}
List <_OverflowRegionData> overflowRegions = _calculateOverflowRegions(overflow, containerRect);
foreach (_OverflowRegionData region in overflowRegions)
{
context.canvas.drawRect(region.rect.shift(offset), _indicatorPaint);
if (_indicatorLabel[(int)region.side].text?.text != region.label)
{
_indicatorLabel[(int)region.side].text = new TextSpan(
text: region.label,
style: _indicatorTextStyle
);
_indicatorLabel[(int)region.side].layout();
}
Offset labelOffset = region.labelOffset + offset;
Offset centerOffset = new Offset(-_indicatorLabel[(int)region.side].width / 2.0f, 0.0f);
Rect textBackgroundRect = centerOffset & _indicatorLabel[(int)region.side].size;
context.canvas.save();
context.canvas.translate(labelOffset.dx, labelOffset.dy);
context.canvas.rotate(region.rotation);
context.canvas.drawRect(textBackgroundRect, _labelBackgroundPaint);
_indicatorLabel[(int)region.side].paint(context.canvas, centerOffset);
context.canvas.restore();
}
bool containsKey = _overflowReportNeeded.TryGetValue(renderObject, out var overflowReportNeeded);
overflowReportNeeded |= !containsKey;
if (overflowReportNeeded)
{
_overflowReportNeeded[renderObject] = false;
_reportOverflow(renderObject, overflow, overflowHints);
}
}
void showButtonMenu()
{
PopupMenuThemeData popupMenuTheme = PopupMenuTheme.of(context);
RenderBox button = (RenderBox)context.findRenderObject();
RenderBox overlay = (RenderBox)Overlay.of(context).context.findRenderObject();
RelativeRect position = RelativeRect.fromRect(
Rect.fromPoints(
button.localToGlobal(widget.offset, ancestor: overlay),
button.localToGlobal(button.size.bottomRight(Offset.zero), ancestor: overlay)
),
Offset.zero & overlay.size
);
List <PopupMenuEntry <T> > items = widget.itemBuilder(context);
if (items.isNotEmpty())
{
material_.showMenu <T>(
context: context,
elevation: widget.elevation ?? popupMenuTheme.elevation,
items: items,
initialValue: widget.initialValue,
position: position,
shape: widget.shape ?? popupMenuTheme.shape,
color: widget.color ?? popupMenuTheme.color,
captureInheritedThemes: widget.captureInheritedThemes
)
.then(newValue => {
if (!mounted)
{
return;
}
if (newValue == null)
{
if (widget.onCanceled != null)
{
widget.onCanceled();
}
return;
}
if (widget.onSelected != null)
{
widget.onSelected((T)newValue);
}
});
}
}
void showButtonMenu()
{
RenderBox button = (RenderBox)this.context.findRenderObject();
RenderBox overlay = (RenderBox)Overlay.of(this.context).context.findRenderObject();
RelativeRect position = RelativeRect.fromRect(
Rect.fromPoints(
button.localToGlobal(this.widget.offset, ancestor: overlay),
button.localToGlobal(button.size.bottomRight(Offset.zero), ancestor: overlay)
),
Offset.zero & overlay.size
);
PopupMenuUtils.showMenu(
context: this.context,
elevation: this.widget.elevation,
items: this.widget.itemBuilder(this.context),
initialValue: this.widget.initialValue,
position: position
)
.Then(newValue => {
if (!this.mounted)
{
return;
}
if (newValue == null)
{
if (this.widget.onCanceled != null)
{
this.widget.onCanceled();
}
return;
}
if (this.widget.onSelected != null)
{
this.widget.onSelected((T)newValue);
}
});
}
public static void paintOverflowIndicator(
RenderObject renderObject,
PaintingContext context,
Offset offset,
Rect containerRect,
Rect childRect,
List <DiagnosticsNode> overflowHints = null
)
{
RelativeRect overflow = RelativeRect.fromRect(containerRect, childRect);
if (overflow.left <= 0.0f &&
overflow.right <= 0.0f &&
overflow.top <= 0.0f &&
overflow.bottom <= 0.0f)
{
return;
}
TextStyle _indicatorTextStyle = new TextStyle(
color: new Color(0xFF900000),
fontSize: _indicatorFontSizePixels,
fontWeight: FontWeight.w800
);
Paint _indicatorPaint = new Paint {
shader = Gradient.linear(
new Offset(0.0f, 0.0f),
new Offset(10.0f, 10.0f),
new List <Color> {
_black, _yellow, _yellow, _black
},
new List <float> {
0.25f, 0.25f, 0.75f, 0.75f
},
TileMode.repeated
)
};
Paint _labelBackgroundPaint = new Paint {
color = new Color(0xFFFFFFFF)
};
List <_OverflowRegionData> overflowRegions = _calculateOverflowRegions(overflow, containerRect);
foreach (_OverflowRegionData region in overflowRegions)
{
context.canvas.drawRect(region.rect.shift(offset), _indicatorPaint);
var textPainter = new TextPainter(textDirection: TextDirection.ltr)
{
text = new TextSpan(
text: region.label,
style: _indicatorTextStyle)
};
textPainter.layout();
Offset labelOffset = region.labelOffset + offset;
Offset centerOffset = new Offset(-textPainter.width / 2.0f, 0.0f);
Rect textBackgroundRect = centerOffset & textPainter.size;
context.canvas.save();
context.canvas.translate(labelOffset.dx, labelOffset.dy);
context.canvas.rotate(region.rotation);
context.canvas.drawRect(textBackgroundRect, _labelBackgroundPaint);
textPainter.paint(context.canvas, centerOffset);
context.canvas.restore();
}
bool containsKey = _overflowReportNeeded.TryGetValue(renderObject, out var overflowReportNeeded);
overflowReportNeeded |= !containsKey;
if (overflowReportNeeded)
{
_overflowReportNeeded[renderObject] = false;
_reportOverflow(renderObject, overflow, overflowHints);
}
}