/// <summary>
/// Draws the background gradient image in the control based on the various gradient settings that are set for the control. All drawing will
/// be performed in memory-based device context before rendering onto the control to allow for flicker-free drawing.
/// </summary>
protected virtual void DrawBackGradientImage(Graphics gCtl)
{
Bitmap bmpGradBackMem = null;
Graphics gGradBackMem = null;
GraphicsState origGraphState = null;
try
{
// At the beginning of your drawing
origGraphState = gCtl.Save();
bmpGradBackMem = new Bitmap(this.Width, this.Height);
gGradBackMem = Graphics.FromImage(bmpGradBackMem);
CoolGradientType BackGradTypeActive = GetBackGradientType();
Color BackGradColor1Active = GetBackGradientColor(1);
Color BackGradColor2Active = GetBackGradientColor(2);
float fGradientSpan = GetBackGradientSpan();
Point ptGradOffset = GetBackGradientOffset();
Rectangle rectBounds = new Rectangle(0, 0, this.Width, this.Height);
if (BackGradColor1Active != Color.Transparent && BackGradTypeActive != CoolGradientType.None)
{
CoolDraw.DrawGradientShape(CoolShape.Rectangle, BackGradTypeActive, gGradBackMem, BackGradColor1Active,
BackGradColor2Active, rectBounds, Color.Transparent, 0, fGradientSpan, ptGradOffset.X, ptGradOffset.Y);
}
else
{
Color?FillColor = null;
if (BackGradColor1Active != Color.Transparent)
{
FillColor = BackGradColor1Active;
}
CoolDraw.DrawShape(CoolShape.Rectangle, gGradBackMem, rectBounds, Color.Transparent, 0,
0, 0, FillColor);
}//end if
Rectangle rectDraw = new Rectangle(0, 0, this.Width, this.Height);
//gCtl.CompositingMode = CompositingMode.SourceCopy;
gCtl.DrawImage(bmpGradBackMem, rectDraw);
}
catch (Exception err)
{
ErrorHandler.ShowErrorMessage(err, "Error in DrawBackGradientImage function of DotCoolPanel control.");
}
finally
{
if (origGraphState != null)
{
gCtl.Restore(origGraphState);
}
if (gGradBackMem != null)
{
gGradBackMem.Dispose();
}
if (bmpGradBackMem != null)
{
bmpGradBackMem.Dispose();
}
}
}
/// <summary>
/// Draws the appropriate gradient check symbol in the box portion of the check control when the control is checked, according to the current
/// state of the control.
/// </summary>
protected virtual void DrawCheckSymbol(Graphics gCtl)
{
Bitmap bmpGradCheckMem = null;
Graphics gGradCheckMem = null;
GraphicsState origGraphState = null;
try
{
// At the beginning of your drawing
origGraphState = gCtl.Save();
bmpGradCheckMem = new Bitmap(CheckSize.Width, CheckSize.Height);
gGradCheckMem = Graphics.FromImage(bmpGradCheckMem);
CoolGradientType CheckGradTypeActive = GetCheckGradientType();
Color CheckGradColor1Active = GetCheckGradientColor(1);
Color CheckGradColor2Active = GetCheckGradientColor(2);
float fGradientSpan = GetCheckGradientSpan();
Point ptGradOffset = GetCheckGradientOffset();
Color CheckBorderColorActive = GetCheckBorderColor();
int iBorderWidth = CheckBorderWidth;
Rectangle rectBounds = new Rectangle(Convert.ToInt32(iBorderWidth / 2), Convert.ToInt32(iBorderWidth / 2),
CheckSize.Width - iBorderWidth - 1,
CheckSize.Height - iBorderWidth - 1);
Point ptCheckLocation = new Point(Convert.ToInt32(m_BoxBounds.Left) + GetBorderWidth() + CheckOffset.X,
Convert.ToInt32(m_BoxBounds.Top) + GetBorderWidth() + CheckOffset.Y);
if (CheckGradColor1Active != Color.Transparent && CheckGradTypeActive != CoolGradientType.None)
{
CoolDraw.DrawGradientShape(CheckShape, CheckGradTypeActive, gGradCheckMem, CheckGradColor1Active,
CheckGradColor2Active, rectBounds, CheckBorderColorActive, iBorderWidth,
fGradientSpan, ptGradOffset.X, ptGradOffset.Y,
CheckRadius.X, CheckRadius.Y);
}
else
{
Color?FillColor = null;
if (CheckGradColor1Active != Color.Transparent)
{
FillColor = CheckGradColor1Active;
}
CoolDraw.DrawShape(CheckShape, gGradCheckMem, rectBounds, CheckBorderColorActive, iBorderWidth,
CheckRadius.X, CheckRadius.Y, FillColor);
}//end if
Rectangle rectDraw = new Rectangle(ptCheckLocation.X, ptCheckLocation.Y, CheckSize.Width, CheckSize.Height);
gCtl.CompositingMode = CompositingMode.SourceOver;
gCtl.DrawImage(bmpGradCheckMem, rectDraw);
}
catch (Exception err)
{
ErrorHandler.ShowErrorMessage(err, "Error in DrawCheckSymbol function of DotCoolCheckBase control.");
}
finally
{
if (origGraphState != null)
{
gCtl.Restore(origGraphState);
}
if (gGradCheckMem != null)
{
gGradCheckMem.Dispose();
}
if (bmpGradCheckMem != null)
{
bmpGradCheckMem.Dispose();
}
}
}