/// <summary>
/// Get properties from selected objects and fill GraphicsProperties instance
/// </summary>
/// <returns></returns>
private GraphicsProperties GetProperties()
{
GraphicsProperties properties = new GraphicsProperties();
int n = SelectionCount;
if (n < 1)
{
return(properties);
}
DrawObject o = GetSelectedObject(0);
int firstColor = o.Color.ToArgb();
int firstPenWidth = o.PenWidth;
bool allColorsAreEqual = true;
bool allWidthAreEqual = true;
for (int i = 1; i < n; i++)
{
if (GetSelectedObject(i).Color.ToArgb() != firstColor)
{
allColorsAreEqual = false;
}
if (GetSelectedObject(i).PenWidth != firstPenWidth)
{
allWidthAreEqual = false;
}
}
if (allColorsAreEqual)
{
properties.ColorDefined = true;
properties.Color = Color.FromArgb(firstColor);
}
if (allWidthAreEqual)
{
properties.PenWidthDefined = true;
properties.PenWidth = firstPenWidth;
}
return(properties);
}
/// <summary>
/// Apply properties for all selected objects //替换所有物件的笔宽和颜色
/// </summary>
private void ApplyProperties(GraphicsProperties properties)
{
foreach (DrawObject o in graphicsList)
{
if (o.Selected)
{
if (properties.ColorDefined)
{
o.Color = properties.Color;
DrawObject.LastUsedColor = properties.Color;
}
if (properties.PenWidthDefined)
{
o.PenWidth = properties.PenWidth;
DrawObject.LastUsedPenWidth = properties.PenWidth;
}
}
}
}
