/// <summary>
/// Gets a bitmap with a certain size.
/// </summary>
/// <param name="width">Pixel width of the bitmap.</param>
/// <param name="height">Pixel height of the bitmap.</param>
/// <returns>A bitmap that can be used for drawing.</returns>
public System.Drawing.Bitmap GetPreviewBitmap(int width, int height)
{
if (_previewBitmap.GdiBitmap.Width != width || _previewBitmap.GdiBitmap.Height != height)
{
_previewBitmap.Resize(width, height);
_previewPanel.Source = _previewBitmap.WpfBitmap;
}
return _previewBitmap.GdiBitmap;
}
private void EhPreview_SizeChanged(object sender, SizeChangedEventArgs e)
{
int w = (int)e.NewSize.Width;
int h = (int)e.NewSize.Height;
if (w > 0 && h > 0 && (w != _previewBitmap.GdiBitmap.Width || h != _previewBitmap.GdiBitmap.Height))
{
_previewBitmap.Resize(w, h);
m_pnPreview.Source = _previewBitmap.WpfBitmap;
InvalidatePreviewPanel();
}
}
public void UpdatePreview(BrushX brush)
{
if (null == _previewPanel || null == brush)
{
return;
}
int height = (int)_previewPanel.ActualHeight;
int width = (int)_previewPanel.ActualWidth;
if (height <= 0)
{
height = 64;
}
if (width <= 0)
{
width = 64;
}
if (null == _previewBitmap)
{
_previewBitmap = new GdiToWpfBitmap(width, height);
_previewPanel.Source = _previewBitmap.WpfBitmap;
}
if (width != _previewBitmap.GdiRectangle.Width || height != _previewBitmap.GdiRectangle.Height)
{
_previewBitmap.Resize(width, height);
_previewPanel.Source = _previewBitmap.WpfBitmap;
}
using (var grfx = _previewBitmap.BeginGdiPainting())
{
var fullRect = _previewBitmap.GdiRectangle;
grfx.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceCopy;
grfx.FillRectangle(System.Drawing.Brushes.Transparent, fullRect);
grfx.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
var r2 = fullRect;
r2.Inflate(-r2.Width / 4, -r2.Height / 4);
//grfx.FillRectangle(System.Drawing.Brushes.Black, r2);
brush.SetEnvironment(fullRect, BrushX.GetEffectiveMaximumResolution(grfx));
grfx.FillRectangle(brush, fullRect);
_previewBitmap.EndGdiPainting();
}
}
private void EhPreviewImageSizeChanged(object sender, SizeChangedEventArgs e)
{
_previewImage.Width = e.NewSize.Width;
_previewImage.Height = e.NewSize.Height;
if (null == _previewBitmap)
{
_previewBitmap = new GdiToWpfBitmap((int)e.NewSize.Width, (int)e.NewSize.Height);
_previewImage.Source = _previewBitmap.WpfBitmap;
}
else
{
_previewBitmap.Resize((int)e.NewSize.Width, (int)e.NewSize.Height);
_previewImage.Source = _previewBitmap.WpfBitmap;
}
UpdatePreview();
}
private void UpdatePreviewPanel()
{
if (null == _previewPanel || null == _pen)
{
return;
}
int height = (int)_previewPanel.ActualHeight;
int width = (int)_previewPanel.ActualWidth;
if (height <= 0)
{
height = 64;
}
if (width <= 0)
{
width = 64;
}
if (null == _previewBitmap)
{
_previewBitmap = new GdiToWpfBitmap(width, height);
_previewPanel.Source = _previewBitmap.WpfBitmap;
}
if (width != _previewBitmap.GdiRectangle.Width || height != _previewBitmap.GdiRectangle.Height)
{
_previewBitmap.Resize(width, height);
_previewPanel.Source = _previewBitmap.WpfBitmap;
}
using (var grfx = _previewBitmap.BeginGdiPainting())
{
var fullRect = _previewBitmap.GdiRectangle;
grfx.FillRectangle(System.Drawing.Brushes.White, fullRect);
_pen.BrushHolder.SetEnvironment(fullRect, BrushX.GetEffectiveMaximumResolution(grfx));
grfx.DrawLine(_pen, fullRect.Width / 6, fullRect.Height / 2, (fullRect.Width * 5) / 6, fullRect.Height / 2);
_previewBitmap.EndGdiPainting();
}
}
