public static Bitmap getFileChooserBitmap()
{
if (hmodShell32 != IntPtr.Zero)
{
// Code copied from ShellFolder2.cpp Java_sun_awt_shell_Win32ShellFolder2_getFileChooserBitmapBits
// Get a handle to an icon.
SafeGdiObjectHandle hBitmap = null;
try
{
hBitmap = isVista ?
LoadImage(hmodShell32, "IDB_TB_SH_DEF_16", IMAGE_BITMAP, 0, 0, 0) :
LoadImage(hmodShell32, (IntPtr)216, IMAGE_BITMAP, 0, 0, 0);
if (hBitmap == null && hmodComctl32 != IntPtr.Zero)
{
hBitmap = LoadImage(hmodComctl32, (IntPtr)124, IMAGE_BITMAP, 0, 0, 0);
}
if (hBitmap != null)
{
BITMAPINFO bmi = new BITMAPINFO();
GetObject(hBitmap, Marshal.SizeOf(bmi), ref bmi);
int width = bmi.biWidth;
int height = bmi.biHeight;
bmi.biSize = 40;
bmi.biHeight = -bmi.biHeight;
bmi.biPlanes = 1;
bmi.biBitCount = 32;
bmi.biCompression = 0;
if (width == 0 || height == 0)
{
return(null);
}
using (SafeDeviceContextHandle dc = SafeDeviceContextHandle.Get())
{
int[] data = new int[width * height];
GetDIBits(dc, hBitmap, (uint)0, (uint)height, data, ref bmi, 0);
Bitmap bitmap = new Bitmap(data.Length / 16, 16, PixelFormat.Format32bppArgb);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
Marshal.Copy(data, 0, bitmapData.Scan0, data.Length);
bitmap.UnlockBits(bitmapData);
return(bitmap);
}
}
}
finally
{
if (hBitmap != null)
{
hBitmap.Close();
}
}
}
return(null);
}
public static Bitmap getShell32IconResourceAsBitmap(int iconID)
{
if (hmodShell32 == IntPtr.Zero)
{
return(null);
}
using (SafeGdiObjectHandle hicon = LoadImage(hmodShell32, (IntPtr)iconID, IMAGE_ICON, 16, 16, 0))
{
if (hicon != null)
{
return(getIconBits(hicon.DangerousGetHandle(), 16));
}
}
return(null);
}
/// <summary>
/// Select a font used to draw text on this <see cref="Canvas"/> class.
/// </summary>
/// <param name="fontName">The name of the font used to draw on the canvas.</param>
/// <param name="fontSize">The size of the font used to draw on the canvas.</param>
/// <param name="fontStyle">The style of the font used to draw on the canvas.</param>
/// <param name="unit">The GraphicsUnit of the new font. </param>
public void SelectFont(string fontName, float fontSize, System.Drawing.FontStyle fontStyle, System.Drawing.GraphicsUnit unit)
{
if (this.hdc != null)
{
if (this.hfont != null)
{
this.hfont.Dispose();
this.hfont = null;
}
// get a handle to the Font object.
using (System.Drawing.Font font = new System.Drawing.Font(fontName, fontSize, fontStyle, unit))
{
this.hfont = new SafeGdiObjectHandle(font.ToHfont(), true);
NativeMethods.SelectObject(this.hdc, this.hfont);
}
// select color
NativeMethods.SetBkMode(this.hdc, NativeMethods.TRANSPARENT);
NativeMethods.SetTextColor(this.hdc, System.Drawing.ColorTranslator.ToWin32(System.Drawing.Color.Black));
}
}
private void ReleaseCanvas()
{
if (this.hdc != null)
{
NativeMethods.SetMapMode(this.hdc, this.oldMapMode);
NativeMethods.SetBkColor(this.hdc, this.oldBkColor);
this.hdc.Dispose();
this.hdc = null;
}
if (this.bitmap != null)
{
this.bitmap.Dispose();
this.bitmap = null;
}
if (this.hfont != null)
{
this.hfont.Dispose();
this.hfont = null;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="Canvas"/> class.
/// </summary>
/// <param name="width">The canvas width.</param>
/// <param name="height">The canvas height.</param>
public Canvas(int width, int height)
{
try
{
// allocate enough to fit all characters
this.width = width <= 0 ? 2000 : width;
this.height = height;
// get handle to device context.
this.hdc = NativeMethods.CreateCompatibleDC(new SafeHdcHandle());
if (this.hdc.IsInvalid)
{
throw new InvalidOperationException(Properties.Resources.E_InvalidCanvasOperation);
}
// create destination bitmap
this.bitmap = NativeMethods.CreateCompatibleBitmap(this.hdc, this.width, this.height);
if (this.bitmap.IsInvalid)
{
throw new InvalidOperationException(Properties.Resources.E_InvalidCanvasOperation);
}
NativeMethods.SelectObject(this.hdc, this.bitmap);
// select color
this.oldMapMode = NativeMethods.SetBkMode(this.hdc, NativeMethods.TRANSPARENT);
this.oldBkColor = NativeMethods.SetTextColor(this.hdc, System.Drawing.ColorTranslator.ToWin32(System.Drawing.Color.Black));
// erase background
this.Clear();
}
catch
{
this.ReleaseCanvas();
throw;
}
}
private static extern int GetObject(SafeGdiObjectHandle hgdiobj, int cbBuffer, ref BITMAPINFO lpvObject);
private static extern int GetDIBits(SafeDeviceContextHandle hdc, SafeGdiObjectHandle hbmp, uint uStartScan, uint cScanLines, int[] lpvBits, ref BITMAPINFO lpbmi, uint uUsage);
private static extern int GetObject(SafeGdiObjectHandle hgdiobj, int cbBuffer, ref BITMAPINFO lpvObject);
private static extern int GetDIBits(SafeDeviceContextHandle hdc, SafeGdiObjectHandle hbmp, uint uStartScan, uint cScanLines, int[] lpvBits, ref BITMAPINFO lpbmi, uint uUsage);
