private void OnMeasureHorizontal(MeasureSpec widthSpec, MeasureSpec heightSpec, Graphics g, Font font, Style style)
{
Operator.Measure(MeasureSpec.MakeUnspecified(), MeasureSpec.MakeUnspecified(), g, font, style);
ActualOperator.Measure(MeasureSpec.MakeUnspecified(), MeasureSpec.MakeUnspecified(), g, font, style);
MeasureSpec leftWidth = null;
MeasureSpec rightWidth = null;
if (widthSpec.Mode == MeasureSpecMode.Fixed)
{
leftWidth = MeasureSpec.MakeFixed((float)((widthSpec.Size - Operator.DesiredWidth) / 2));
rightWidth = MeasureSpec.MakeFixed((float)((widthSpec.Size - Operator.DesiredWidth) / 2));
}
else if (widthSpec.Mode == MeasureSpecMode.AtMost)
{
leftWidth = MeasureSpec.MakeAtMost((float)((widthSpec.Size - Operator.DesiredWidth) / 2));
rightWidth = MeasureSpec.MakeAtMost((float)((widthSpec.Size - Operator.DesiredWidth) / 2));
}
else if (widthSpec.Mode == MeasureSpecMode.Unspecified)
{
leftWidth = widthSpec;
rightWidth = widthSpec;
}
Left.Measure(leftWidth, heightSpec, g, font, style);
Right.Measure(rightWidth, heightSpec, g, font, style);
isTwoLines = Left.DesiredWidth > 450 || Right.DesiredWidth > 450;
if (!isTwoLines)
{
SetDesiredSize(
Left.DesiredWidth + Right.DesiredWidth + GetOperatorWidth(),
Math.Max(Left.FindMaxTop(), Right.FindMaxTop()) + Math.Max(Left.FindMaxBottom(), Right.FindMaxBottom()));
}
else
{
Operator = ActualOperator;
SetDesiredSize(
Math.Max(Left.DesiredWidth, Right.DesiredWidth + GetOperatorWidth()),
Left.DesiredHeight + Math.Max(Operator.DesiredHeight, Right.DesiredHeight));
}
}
protected override void OnMeasure(MeasureSpec widthSpec, MeasureSpec heightSpec, Graphics g, Font font, Style style)
{
if (Rows.Length == 0)
{
SetDesiredSize(0, 0);
return;
}
int rowCount = Rows.Length;
int columnCount = Rows[0].Length;
float spacing = 10;
MeasureSpec cellWidth = MeasureSpec.MakeUnspecified();
MeasureSpec cellHeight = MeasureSpec.MakeUnspecified();
if (widthSpec.Mode == MeasureSpecMode.Fixed || widthSpec.Mode == MeasureSpecMode.AtMost)
{
cellWidth = MeasureSpec.MakeAtMost((widthSpec.Size - (columnCount + 1) * spacing) / columnCount);
}
if (heightSpec.Mode == MeasureSpecMode.Fixed || heightSpec.Mode == MeasureSpecMode.AtMost)
{
cellHeight = MeasureSpec.MakeAtMost((heightSpec.Size - (rowCount + 1) * spacing) / rowCount);
}
maxCellWidth = new float[columnCount];
maxCellTopHeight = new float[rowCount];
maxCellBottomHeight = new float[rowCount];
int rowIndex = 0;
foreach (Expression[] row in Rows)
{
int columnIndex = 0;
foreach (Expression item in row)
{
item.Measure(cellWidth, cellHeight, g, font, style);
if (maxCellWidth[columnIndex] < item.DesiredWidth)
{
maxCellWidth[columnIndex] = item.DesiredWidth;
}
float topHeight = item.FindMaxTop();
float bottomHeight = item.FindMaxBottom();
if (maxCellTopHeight[rowIndex] < topHeight)
{
maxCellTopHeight[rowIndex] = topHeight;
}
if (maxCellBottomHeight[rowIndex] < bottomHeight)
{
maxCellBottomHeight[rowIndex] = bottomHeight;
}
columnIndex++;
}
rowIndex++;
}
SetDesiredSize(
maxCellWidth.Sum() + (columnCount + 1) * spacing,
maxCellTopHeight.Sum() + maxCellBottomHeight.Sum() + (rowIndex + 1) * spacing);
}
