public bool ShowDialog()
{
var cc = new CHOOSECOLOR();
cc.lStructSize = (int)Marshal.SizeOf <CHOOSECOLOR>();
cc.hwndOwner = GetActiveWindow();
cc.rgbResult = ColorPicker.ColorToUInt(Color);
cc.Flags = CC_ANYCOLOR | CC_RGBINIT;
cc.lpCustColors = Marshal.AllocHGlobal(64);
for (int i = 0; i < 16; ++i)
{
Marshal.WriteInt32(cc.lpCustColors + i * 4, 0);
}
var ret = ChooseColorW(out cc);
if (ret)
{
Color = ColorPicker.ColorFromUInt(cc.rgbResult);
}
Marshal.FreeHGlobal(cc.lpCustColors);
return(ret);
}
/// <summary>
/// Initializes a new instance of the <b>ColorDialog</b> class.
/// </summary>
/// <remarks>When you create an instance of ColorDialog, the following read/write properties are set to initial values.
/// <list type="table"><listheader><term>Property</term><term>Initial Value</term></listheader>
/// <item><term>AllowFullOpen</term><term>true</term></item>
/// <item><term>Color</term><term>Color.Black</term></item>
/// <item><term>CustomColors</term><term>A null reference (Nothing in Visual Basic)</term></item>
/// <item><term>FullOpen</term><term>false</term></item></list>
///
/// <para>You can change the value for any of these properties through a separate call to the property.</para></remarks>
public ColorDialog()
{
m_color = new CHOOSECOLOR();
//array for custom colors
m_rawcustom = new int[16];
m_custhandle = GCHandle.Alloc(m_rawcustom, GCHandleType.Pinned);
m_color.lpCustColors = m_custhandle.AddrOfPinnedObject();
}
/// <summary>
/// Initializes a new instance of the <b>ColorDialog</b> class.
/// </summary>
/// <remarks>When you create an instance of ColorDialog, the following read/write properties are set to initial values.
/// <list type="table"><listheader><term>Property</term><term>Initial Value</term></listheader>
/// <item><term>AllowFullOpen</term><term>true</term></item>
/// <item><term>Color</term><term>Color.Black</term></item>
/// <item><term>CustomColors</term><term>A null reference (Nothing in Visual Basic)</term></item>
/// <item><term>FullOpen</term><term>false</term></item></list>
///
/// <para>You can change the value for any of these properties through a separate call to the property.</para></remarks>
public ColorDialog()
{
m_color = new CHOOSECOLOR();
//array for custom colors
m_rawcustom = new int[16];
m_custhandle = GCHandle.Alloc(m_rawcustom, GCHandleType.Pinned);
m_color.lpCustColors = m_custhandle.AddrOfPinnedObject();
}
private void OnMoreColorsClick(object sender, RoutedEventArgs e)
{
if (this.MoreColorsExecuting != null)
{
var args = new MoreColorsExecutingEventArgs();
this.MoreColorsExecuting(this, args);
if (!args.Canceled)
{
var color = args.Color;
if (RecentColors.Contains(color))
{
RecentColors.Remove(color);
}
RecentColors.Insert(0, color);
this.recentColorsListBox.SelectedIndex = 0;
}
}
else
{
#pragma warning disable 618
var chooseColor = new CHOOSECOLOR();
var wnd = Window.GetWindow(this);
if (wnd != null)
{
chooseColor.hwndOwner = new WindowInteropHelper(wnd).Handle;
}
chooseColor.Flags = CC_ANYCOLOR;
if (customColors == IntPtr.Zero)
{
// Set custom colors)
for (var i = 0; i < this.colorsArray.Length; i++)
{
this.colorsArray[i] = 0x00FFFFFF;
}
customColors = GCHandle.Alloc(this.colorsArray, GCHandleType.Pinned).AddrOfPinnedObject();
}
chooseColor.lpCustColors = customColors;
if (ChooseColor(chooseColor))
{
var color = ConvertFromWin32Color(chooseColor.rgbResult);
if (RecentColors.Contains(color))
{
RecentColors.Remove(color);
}
RecentColors.Insert(0, color);
this.recentColorsListBox.SelectedIndex = 0;
}
#pragma warning restore 618
}
}
public void ChooseColorTest()
{
var cc = new CHOOSECOLOR
{
lStructSize = (uint)Marshal.SizeOf(typeof(CHOOSECOLOR)),
rgbResult = System.Drawing.Color.Red,
Flags = CC.CC_RGBINIT,
hwndOwner = GetDesktopWindow()
};
Assert.That(ChooseColor(ref cc), Is.True);
}
/// <summary>
/// Shows the dialog for the view model.
/// </summary>
/// <returns>How the dialog was closed.</returns>
public new DialogResult ShowDialog()
{
if (_dialogService.HasDialogHandler(typeof(ColorPickerDialogViewModel)))
{
return(_dialogService.ShowDialog(this));
}
var topMostWindow = _dialogService.GetTopMostDialog() ?? _dialogService.MainWindow;
var windowInteropHelper = new WindowInteropHelper(topMostWindow);
var customColors = Marshal.AllocCoTaskMem(_customColors.Length * Marshal.SizeOf(_customColors[0]));
Marshal.Copy(_customColors, 0, customColors, _customColors.Length);
var chooseColor = new CHOOSECOLOR();
chooseColor.hwndOwner = windowInteropHelper.Handle;
chooseColor.rgbResult.R = SelectedColor.R;
chooseColor.rgbResult.G = SelectedColor.G;
chooseColor.rgbResult.B = SelectedColor.B;
chooseColor.lpCustColors = customColors;
chooseColor.Flags = CC_FULLOPEN | CC_RGBINIT;
var result = DialogResult.Cancel;
if (ChooseColor(chooseColor))
{
SelectedColor = System.Windows.Media.Color.FromRgb(chooseColor.rgbResult.R, chooseColor.rgbResult.G, chooseColor.rgbResult.B);
result = DialogResult.Ok;
}
Marshal.Copy(customColors, _customColors, 0, _customColors.Length);
Marshal.FreeCoTaskMem(customColors);
return(result);
}
// Class initialization function
public bool Init(Control ctrlParent)
{
// Allocate the array for initial colors.
int cbColorData = 16 * 4;
IntPtr ipColors = LocalAlloc(LMEM_FIXED, cbColorData);
if (ipColors == IntPtr.Zero)
{
return(false);
}
m_cc = new CHOOSECOLOR();
m_cc.lStructSize = Marshal.SizeOf(m_cc);
m_cc.hwndOwner = GetHwndFromControl(ctrlParent);
m_cc.hInstance = IntPtr.Zero;
m_cc.rgbResult = 0;
m_cc.lpCustColors = ipColors;
m_cc.Flags = CC_RGBINIT;
m_cc.lCustData = 0;
m_cc.lpfnHook = IntPtr.Zero;
m_cc.lpTemplateName = IntPtr.Zero;
return(true);
}
public static extern bool ChooseColorA([In, Out] CHOOSECOLOR pChoosecolor);//对应的win32API
public static extern bool ChooseColor(CHOOSECOLOR lpcc);
private static extern bool ChooseColorW(out CHOOSECOLOR lpcc);
public static extern int ChooseColor(ref CHOOSECOLOR lpcc);
private static extern bool ChooseColor(CHOOSECOLOR lpcc);
public static extern bool ChooseColor(CHOOSECOLOR lpcc);
private static extern bool ChooseColor([In, Out] CHOOSECOLOR lpchoosecolor);
