private void TrackResizePreview(SplitterGrip grip, double horizontalChange, double verticalChange)
{
int gripIndex;
int resizeIndex1;
int resizeIndex2;
if (!this.GetResizeIndices(grip, out gripIndex, out resizeIndex1, out resizeIndex2))
{
return;
}
double pixelAmount = this.Orientation == Orientation.Horizontal ? horizontalChange : verticalChange;
IList <SplitterMeasureData> splitterMeasureDataList = SplitterMeasureData.FromElements((IList)this.InternalChildren);
this.ResizeChildrenCore(splitterMeasureDataList[resizeIndex1], splitterMeasureDataList[resizeIndex2], pixelAmount);
SplitterPanel.Measure(this.RenderSize, this.Orientation, (IEnumerable <SplitterMeasureData>)splitterMeasureDataList, false);
Point point = grip.TransformToAncestor((Visual)this).Transform(new Point(0.0, 0.0));
if (this.Orientation == Orientation.Horizontal)
{
point.X += splitterMeasureDataList[gripIndex].MeasuredBounds.Width - this.InternalChildren[gripIndex].RenderSize.Width;
}
else
{
point.Y += splitterMeasureDataList[gripIndex].MeasuredBounds.Height - this.InternalChildren[gripIndex].RenderSize.Height;
}
Point screen = this.PointToScreen(point);
this.currentPreviewWindow.Move((double)(int)screen.X, (double)(int)screen.Y);
}
internal void ResizeChildren(int index1, int index2, double pixelAmount)
{
SplitterMeasureData child1 = new SplitterMeasureData(this.InternalChildren[index1]);
SplitterMeasureData child2 = new SplitterMeasureData(this.InternalChildren[index2]);
if (!this.ResizeChildrenCore(child1, child2, pixelAmount))
{
return;
}
SplitterPanel.SetSplitterLength(child1.Element, child1.AttachedLength);
SplitterPanel.SetSplitterLength(child2.Element, child2.AttachedLength);
this.InvalidateMeasure();
}
private bool ResizeChildrenCore(SplitterMeasureData child1, SplitterMeasureData child2, double pixelAmount)
{
UIElement element1 = child1.Element;
UIElement element2 = child2.Element;
SplitterLength attachedLength1 = child1.AttachedLength;
SplitterLength attachedLength2 = child2.AttachedLength;
double actualSplitterLength1 = SplitterPanel.GetActualSplitterLength(element1);
double actualSplitterLength2 = SplitterPanel.GetActualSplitterLength(element2);
double num1 = Math.Max(0.0, Math.Min(actualSplitterLength1 + actualSplitterLength2, actualSplitterLength1 + pixelAmount));
double num2 = Math.Max(0.0, Math.Min(actualSplitterLength1 + actualSplitterLength2, actualSplitterLength2 - pixelAmount));
double minimumLength1 = SplitterPanel.GetMinimumLength(element1);
double minimumLength2 = SplitterPanel.GetMinimumLength(element2);
if (minimumLength1 + minimumLength2 > num1 + num2)
{
return(false);
}
if (num1 < minimumLength1)
{
num2 -= minimumLength1 - num1;
num1 = minimumLength1;
}
if (num2 < minimumLength2)
{
num1 -= minimumLength2 - num2;
num2 = minimumLength2;
}
if (attachedLength1.IsFill && attachedLength2.IsFill || attachedLength1.IsStretch && attachedLength2.IsStretch)
{
SplitterMeasureData splitterMeasureData = child1;
double num3 = num1;
SplitterLength splitterLength = new SplitterLength(num3 / (num3 + num2) * (attachedLength1.Value + attachedLength2.Value), attachedLength1.SplitterUnitType);
splitterMeasureData.AttachedLength = splitterLength;
child2.AttachedLength = new SplitterLength(num2 / (num1 + num2) * (attachedLength1.Value + attachedLength2.Value), attachedLength1.SplitterUnitType);
}
else if (attachedLength1.IsFill)
{
child2.AttachedLength = new SplitterLength(num2, SplitterUnitType.Stretch);
}
else
{
child1.AttachedLength = new SplitterLength(num1, SplitterUnitType.Stretch);
}
return(true);
}
protected override Size MeasureOverride(Size availableSize)
{
this.UpdateIndices();
return(SplitterPanel.Measure(availableSize, this.Orientation, (IEnumerable <SplitterMeasureData>)SplitterMeasureData.FromElements((IList)this.InternalChildren), true));
}
