// Handle a paint event from Xsharp.
protected override void OnPaint(Xsharp.Graphics graphics)
{
if (sink != null)
{
System.Drawing.Region clip = RegionToDrawingRegion(graphics.ExposeRegion);
DrawingGraphics g = new DrawingGraphics(toolkit, graphics);
using (System.Drawing.Graphics gr =
ToolkitManager.CreateGraphics(g, clip))
{
sink.ToolkitExpose(gr);
}
}
}
// Set this window's icon.
void IToolkitTopLevelWindow.SetIcon(Icon icon)
{
DotGNU.Images.Frame frame = ToolkitManager.GetImageFrame(icon);
Xsharp.Image origIcon = Icon;
if (frame != null)
{
Icon = new Xsharp.Image(Screen, frame);
}
else
{
Icon = null;
}
if (origIcon != null)
{
origIcon.Dispose();
}
}
// Start printing a page, and return a "Graphics" object for it.
public Graphics StartPage(PrintPageEventArgs e)
{
// Make sure that the previous page was closed.
EndPage(e);
// Output the page header information.
writer.WriteLine("%%Page: {0} {0}", pageNum, pageNum);
writer.WriteLine("%%BeginPageSetup");
// Save the current VM state, so that we can
// discard temporary definitions at the end
// of the page.
writer.WriteLine("/pagelevel save def");
// Flip the co-ordinate system so that the top-left
// margin position on the page is the origin.
double temp;
if (e.PageSettings.Landscape)
{
// TODO: rotate the co-ordinate system for landscape mode.
}
else
{
temp = (e.PageBounds.Height * 72.0) / 100.0;
#if CONFIG_EXTENDED_NUMERICS
writer.WriteLine("0 {0} translate 1 -1 scale", temp);
#else
writer.WriteLine("0 {0} translate 1 -1 scale", (int)temp);
#endif
}
// Mark the end of the page header information.
writer.WriteLine("%%EndPageSetup");
// We are now on a page.
onPage = true;
// Save the graphics state. It will be restored and
// re-saved every time a pen or brush is changed.
writer.WriteLine("gsave");
// Create a "Graphics" object for this page and return it.
return(ToolkitManager.CreateGraphics
(new PostscriptGraphics(toolkit, writer, this)));
}
// Create an HICON handle from an icon.
// "DeleteObject" must be called on it when no longer needed.
IntPtr HandleFromIcon(Icon icon)
{
Frame frame = ToolkitManager.GetImageFrame(icon);
Win32.Api.ICONINFO iconInfo = new System.Drawing.Win32.Api.ICONINFO();
iconInfo.fIcon = true;
// Hotspot is always the middle for an icon.
iconInfo.xHotspot = iconInfo.yHotspot = 0;
// Create the mono bitmap mask using CreateBitmap rather than CreateDIBitmap, its faster.
// CreateBitmap expects the mask data to be word aligned, not int aligned and the mask is inverted.
int frameBytes = (frame.Width + 7) / 8;
int newStride = (frameBytes + 1) & ~1;
byte[] inverseMask = new byte[frame.Height * newStride];
int prevOldPos = 0;
int prevNewPos = 0;
for (int y = 0; y < frame.Height; y++)
{
int oldPos = prevOldPos;
int newPos = prevNewPos;
for (int b = 0; b < frameBytes; b++)
{
inverseMask[newPos++] = (byte)~frame.Mask[oldPos++];
}
prevOldPos += frame.MaskStride;
prevNewPos += newStride;
}
iconInfo.hbmMask = Win32.Api.CreateBitmap(frame.Width, frame.Height, 1, 1, inverseMask);
iconInfo.hbmColor = HandleFromBitmap(frame, true);
IntPtr iconHandle = Win32.Api.CreateIconIndirect(ref iconInfo);
Win32.Api.DeleteObject(iconInfo.hbmMask);
Win32.Api.DeleteObject(iconInfo.hbmColor);
return(iconHandle);
}
// WM_PAINT Message
internal void Paint()
{
Win32.Api.PAINTSTRUCT myPS = new System.Drawing.Win32.Api.PAINTSTRUCT();
hdc = Win32.Api.BeginPaint(hwnd, ref myPS);
if (sink != null)
{
DrawingGraphics g = new DrawingGraphics(toolkit, hdc);
Region clip = new Region(Rectangle.FromLTRB(myPS.rcPaintLeft, myPS.rcPaintTop, myPS.rcPaintRight, myPS.rcPaintBottom));
System.Drawing.Graphics gr = ToolkitManager.CreateGraphics(g, clip);
try
{
sink.ToolkitExpose(gr);
}
finally
{
// EndPaint deletes the hdc but that doesnt matter.
Win32.Api.EndPaint(hwnd, ref myPS);
gr.Dispose();
}
//Console.WriteLine( "DrawingWindow.Paint "+ sink +","+gr.ClipBounds.ToString());
}
}
