private PointF GetGripPosition(SizeGripPositions grip)
{
PointF pos = new PointF(0, 0);
if (grip == SizeGripPositions.North)
{
pos.X = Rectangle.ActualWidth / 2;
pos.Y = -4;
}
else if (grip == SizeGripPositions.East)
{
pos.X = Rectangle.ActualWidth + 4;
pos.Y = Rectangle.ActualHeight / 2;
}
else if (grip == SizeGripPositions.South)
{
pos.X = Rectangle.ActualWidth / 2;
pos.Y = Rectangle.ActualHeight + 4;
}
else if (grip == SizeGripPositions.West)
{
pos.X = -4;
pos.Y = Rectangle.ActualHeight / 2;
}
pos.X += Rectangle.AbsoluteX;
pos.Y += Rectangle.AbsoluteY;
return(pos);
}
private PointF GetGripPosition (SizeGripPositions grip)
{
PointF pos = new PointF(0, 0);
if (grip == SizeGripPositions.North)
{
pos.X = Rectangle.ActualWidth / 2;
pos.Y = -4;
}
else if (grip == SizeGripPositions.East)
{
pos.X = Rectangle.ActualWidth + 4;
pos.Y = Rectangle.ActualHeight / 2;
}
else if (grip == SizeGripPositions.South)
{
pos.X = Rectangle.ActualWidth / 2;
pos.Y = Rectangle.ActualHeight + 4;
}
else if (grip == SizeGripPositions.West)
{
pos.X = - 4;
pos.Y = Rectangle.ActualHeight / 2;
}
pos.X += Rectangle.AbsoluteX;
pos.Y += Rectangle.AbsoluteY;
return pos;
}
public override void HandleMouseLeave()
{
if (grabbedGrip == SizeGripPositions.None)
{
SizeGripMouseLeave(this, new SizeGripEventArgs(highlightedGrip));
highlightedGrip = SizeGripPositions.None;
EmitRedraw();
}
}
public override void HandleMouseDown(PointF pos)
{
grabbedGrip = InternalHitTest(pos);
dragPos = pos;
dragOfst.X = Rectangle.X - dragPos.X;
dragOfst.Y = Rectangle.Y - dragPos.Y;
dragOrigWidth = Rectangle.ActualWidth;
dragOrigHeight = Rectangle.ActualHeight;
}
private void DrawGripRect (Graphics graphics, SizeGripPositions grip)
{
Pen pen = Pens.Gray;
if (grip == highlightedGrip)
pen = Pens.Black;
PointF pos = GetGripPosition (grip);
graphics.FillRectangle(Brushes.White, pos.X - 3, pos.Y - 3, 6, 6);
graphics.DrawRectangle(pen, pos.X - 3, pos.Y - 3, 6, 6);
}
private bool InternalHitTest(PointF pos, SizeGripPositions grip)
{
if ((gripPositions & grip) == grip)
{
if (IsInGrip(pos, GetGripPosition(grip)))
{
return(true);
}
}
return(false);
}
private void DrawGripRect(Graphics graphics, SizeGripPositions grip)
{
Pen pen = Pens.Gray;
if (grip == highlightedGrip)
{
pen = Pens.Black;
}
PointF pos = GetGripPosition(grip);
graphics.FillRectangle(Brushes.White, pos.X - 3, pos.Y - 3, 6, 6);
graphics.DrawRectangle(pen, pos.X - 3, pos.Y - 3, 6, 6);
}
public override void HandleMouseMove(PointF pos)
{
SizeGripPositions newGrip = InternalHitTest(pos);
if (grabbedGrip == SizeGripPositions.None)
{
if (highlightedGrip != newGrip)
{
SizeGripMouseLeave(this, new SizeGripEventArgs(highlightedGrip));
highlightedGrip = newGrip;
SizeGripMouseEnter(this, new SizeGripEventArgs(highlightedGrip));
EmitRedraw();
}
}
if (grabbedGrip != SizeGripPositions.None)
{
if (grabbedGrip == SizeGripPositions.North)
{
if (pos.Y >= 40)
{
Rectangle.Y = dragOfst.Y + pos.Y;
Rectangle.Height = dragOrigHeight - pos.Y + dragPos.Y;
}
}
else if (grabbedGrip == SizeGripPositions.East)
{
Rectangle.Width = dragOrigWidth + pos.X - dragPos.X;
}
else if (grabbedGrip == SizeGripPositions.South)
{
Rectangle.Height = dragOrigHeight + pos.Y - dragPos.Y;
}
else if (grabbedGrip == SizeGripPositions.West)
{
if (pos.X >= 40)
{
Rectangle.X = dragOfst.X + pos.X;
Rectangle.Width = dragOrigWidth - pos.X + dragPos.X;
}
}
}
}
public SizeGripEventArgs(SizeGripPositions gripPosition)
{
this.gripPosition = gripPosition;
}
public override void HandleMouseUp(PointF pos)
{
grabbedGrip = SizeGripPositions.None;
}
public SizeGripEventArgs (SizeGripPositions gripPosition)
{
this.gripPosition = gripPosition;
}
public override void HandleMouseLeave()
{
if (grabbedGrip == SizeGripPositions.None)
{
SizeGripMouseLeave (this, new SizeGripEventArgs(highlightedGrip));
highlightedGrip = SizeGripPositions.None;
EmitRedraw();
}
}
public override void HandleMouseUp(PointF pos)
{
grabbedGrip = SizeGripPositions.None;
}
public override void HandleMouseMove(PointF pos)
{
SizeGripPositions newGrip = InternalHitTest(pos);
if (grabbedGrip == SizeGripPositions.None)
{
if (highlightedGrip != newGrip)
{
SizeGripMouseLeave (this, new SizeGripEventArgs(highlightedGrip));
highlightedGrip = newGrip;
SizeGripMouseEnter (this, new SizeGripEventArgs(highlightedGrip));
EmitRedraw();
}
}
if (grabbedGrip != SizeGripPositions.None)
{
if (grabbedGrip == SizeGripPositions.North)
{
if (pos.Y >= 40)
{
Rectangle.Y = dragOfst.Y + pos.Y;
Rectangle.Height = dragOrigHeight - pos.Y + dragPos.Y;
}
}
else if (grabbedGrip == SizeGripPositions.East)
{
Rectangle.Width = dragOrigWidth + pos.X - dragPos.X;
}
else if (grabbedGrip == SizeGripPositions.South)
{
Rectangle.Height = dragOrigHeight + pos.Y - dragPos.Y;
}
else if (grabbedGrip == SizeGripPositions.West)
{
if (pos.X >= 40)
{
Rectangle.X = dragOfst.X + pos.X;
Rectangle.Width = dragOrigWidth - pos.X + dragPos.X;
}
}
}
}
public override void HandleMouseDown(PointF pos)
{
grabbedGrip = InternalHitTest(pos);
dragPos = pos;
dragOfst.X = Rectangle.X - dragPos.X;
dragOfst.Y = Rectangle.Y - dragPos.Y;
dragOrigWidth = Rectangle.ActualWidth;
dragOrigHeight = Rectangle.ActualHeight;
}
private bool InternalHitTest(PointF pos, SizeGripPositions grip)
{
if ((gripPositions & grip) == grip)
if (IsInGrip (pos, GetGripPosition(grip)))
return true;
return false;
}
