/// <summary>Resizes the bitmap to the specified size.</summary>
/// <remarks>This should be overloaded to speed up the resize.</remarks>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="mode">The resize mode.</param>
/// <returns></returns>
public virtual Bitmap32 Resize(int width, int height, ResizeMode mode = 0)
{
var result = new Bitmap32(width, height);
float w = width;
float h = height;
if (mode != ResizeMode.None)
{
float fw = w / (float)Width;
float fh = h / (float)Height;
float f;
if (mode.HasFlag(ResizeMode.TouchFromInside))
{
f = Math.Min(fw, fh);
}
else
{
f = Math.Max(fw, fh);
}
w = Width * f;
h = Height * f;
}
float x = (width - w) / 2;
float y = (height - h) / 2;
result.Draw(this, x, y, w, h);
return(result);
}
// Use Windows messages to handle resizing of the ruler at the edges
// and moving of the cursor marker.
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
//WM_NCHITTEST (sent for all mouse events)
case 0x84:
// Get mouse position and convert to app coordinates
Point pos = Cursor.Position;
pos = this.PointToClient(pos);
// Check if inside grip area (5 pixels next to border)
if (ResizeMode.HasFlag(FormResizeMode.Horizontal))
{
if (pos.X <= GRIP_OFFSET)
{
m.Result = (IntPtr)HTLEFT;
return;
}
else if (pos.X >= this.ClientSize.Width - GRIP_OFFSET)
{
m.Result = (IntPtr)HTRIGHT;
return;
}
}
if (ResizeMode.HasFlag(FormResizeMode.Vertical))
{
if (pos.Y <= GRIP_OFFSET)
{
m.Result = (IntPtr)HTTOP;
return;
}
else if (pos.Y >= this.ClientSize.Height - GRIP_OFFSET)
{
m.Result = (IntPtr)HTBOTTOM;
return;
}
}
break;
}
// Pass return message down to base class
base.WndProc(ref m);
}