/// <summary>
/// Draws the gradient background image of the DotCoolNativeButton according to the background gradient settings that are set for the control.
/// NOTE: The DotCoolNativeButton will use the button's background image, rather than the paint event handlers to render the background gradient
/// image so that the button's native functionality can be maintained.
/// </summary>
protected virtual void DrawGradientBackgroundImage()
{
Bitmap bmpGradBackMem = null;
Graphics gGradBackMem = null;
Graphics gGradBack = null;
try
{
bmpGradBackMem = new Bitmap(ClientRectangle.Width, ClientRectangle.Height);
gGradBackMem = Graphics.FromImage(bmpGradBackMem);
CoolGradientType BackGradTypeActive = GetBackGradientType();
Color BackGradColor1Active = GetBackGradientColor(1);
Color BackGradColor2Active = GetBackGradientColor(2);
float fGradSpan = GetBackGradientSpan();
Point ptGradOffset = GetBackGradientOffset();
if (BackGradTypeActive == CoolGradientType.None || BackGradColor1Active == Color.Transparent)
{
ClearGradientBackgroundImage();
return;
}
else
{
CoolGradient.DrawGradient(BackGradTypeActive, gGradBackMem, BackGradColor1Active, BackGradColor2Active, ClientRectangle,
fGradSpan, ptGradOffset.X, ptGradOffset.Y);
}
this.BackgroundImage = new Bitmap(ClientRectangle.Width, ClientRectangle.Height);
gGradBack = Graphics.FromImage(this.BackgroundImage);
gGradBack.DrawImage(bmpGradBackMem, ClientRectangle);
this.Refresh();
}
catch (Exception err)
{
ErrorHandler.ShowErrorMessage(err, "Error in DrawGradientBackgroundImage function of DotCoolNativeButton control.");
}
finally
{
if (gGradBackMem != null)
{
gGradBackMem.Dispose();
}
if (gGradBack != null)
{
gGradBack.Dispose();
}
if (bmpGradBackMem != null)
{
bmpGradBackMem.Dispose();
}
}
}
/// <summary>
/// Gets the appropriate background gradient span value of the control based on the control's current state.
/// </summary>
/// <returns></returns>
protected virtual float GetBackGradientSpan()
{
try
{
if (!this.Enabled && BackGradientSettingsDisabled.GradientColor1 != Color.Transparent)
{
if (BackGradientSettingsDisabled.UseDefaultGradientSpan)
{
return(CoolGradient.GetDefaultGradientSpan(BackGradientSettingsDisabled.GradientType));
}
else
{
return(BackGradientSettingsDisabled.GradientSpan);
}
}
if (m_blMouseDown && BackGradientSettingsMouseDown.GradientColor1 != Color.Transparent)
{
if (BackGradientSettingsMouseDown.UseDefaultGradientSpan)
{
return(CoolGradient.GetDefaultGradientSpan(BackGradientSettingsMouseDown.GradientType));
}
else
{
return(BackGradientSettingsMouseDown.GradientSpan);
}
}
else if (m_blMouseOver && BackGradientSettingsMouseOver.GradientColor1 != Color.Transparent)
{
if (BackGradientSettingsMouseOver.UseDefaultGradientSpan)
{
return(CoolGradient.GetDefaultGradientSpan(BackGradientSettingsMouseOver.GradientType));
}
else
{
return(BackGradientSettingsMouseOver.GradientSpan);
}
}
else
{
if (BackGradientSettings.UseDefaultGradientSpan)
{
return(CoolGradient.GetDefaultGradientSpan(BackGradientSettings.GradientType));
}
else
{
return(BackGradientSettings.GradientSpan);
}
}//end if
}
catch (Exception err)
{
ErrorHandler.ShowErrorMessage(err, "Error in GetBackGradientSpan function of DotCoolPanel control.");
return(0f);
}
}
/// <summary>
/// Gets the appropriate gradient span value of the check symbol based on the control's current state.
/// </summary>
/// <returns></returns>
/// <param name="delStateCheckFunc">Delegate to a function containing additional logic to add to the function. The function will be usually
/// passed from children classes to the base DotCoolControl class to embed additional criteria to a visual setting state checking function.</param>
/// <returns></returns>
protected virtual float GetCheckGradientSpan(Func <float> delStateCheckFunc)
{
try
{
if (!this.Enabled && CheckGradientSettings.GradientColor1 != Color.Transparent)
{
if (CheckGradientSettingsDisabled.UseDefaultGradientSpan)
{
return(CoolGradient.GetDefaultGradientSpan(CheckGradientSettingsDisabled.GradientType));
}
else
{
return(CheckGradientSettingsDisabled.GradientSpan);
}
}
else if (m_blMouseOver && CheckGradientSettingsMouseOver.GradientColor1 != Color.Transparent)
{
if (CheckGradientSettingsMouseOver.UseDefaultGradientSpan)
{
return(CoolGradient.GetDefaultGradientSpan(CheckGradientSettingsMouseOver.GradientType));
}
else
{
return(CheckGradientSettingsMouseOver.GradientSpan);
}
}
else if (delStateCheckFunc != null)
{
float fResult = delStateCheckFunc.Invoke();
if (fResult != -1)
{
return(fResult);
}
}
if (CheckGradientSettings.UseDefaultGradientSpan)
{
return(CoolGradient.GetDefaultGradientSpan(CheckGradientSettings.GradientType));
}
else
{
return(CheckGradientSettings.GradientSpan);
}
}
catch (Exception err)
{
ErrorHandler.ShowErrorMessage(err, "Error in GetCheckGradientSpan function of DotCoolCheckBase control.");
return(0f);
}
}
