GtkSharp/sample/GtkDemo/DemoColorSelection.cs
Dan Winship 246d4e1620 * samples/GtkDemo/*.cs: General fixup and cleanup; Remove some
gratuitous differences from the C version. Make comment and indent
	style consistent. Don't use "this." where not needed. Override
	OnDeleteEvent rather than connecting one's own DeleteEvent signal.

	* sample/GtkDemo/DemoApplicationWindow.cs (static
	DemoApplicationWindow): register the Gtk logo icon with
	StockManager so it shows up correctly in the toolbar.
	(AddActions): Register the radio items as radio items so they work
	right.

	* sample/GtkDemo/DemoHyperText.cs (EventAfter): handle
	link-clicking from Widget.WidgetEventAfter (as in the C version),
	rather than ButtonRelease, now that WidgetEventAfter is wrapped.

	* sample/GtkDemo/DemoImages.cs (DemoImages): use
	Gtk.Image.LoadFromResource (particularly to make the animation
	work right).
	(OnDestroyed): handle clean up (remove the timeout, etc)

	* sample/GtkDemo/DemoMain.cs (LoadStream): Fix handling of blank
	lines and whitespace to match the C version.

	* sample/GtkDemo/DemoPixbuf.cs (Expose): Use
	System.Runtime.InteropServices.Marshal.Copy() to copy
	pixbuf.Pixels to pass to DrawRgbImageDithalign, to make this more
	like the C version (and probably faster?)
	(timeout): Remove the FIXME since it seems to work now

	* sample/GtkDemo/DemoStockBrowser.cs: Simplify a bunch. Use
	reflection to get the C# names of the stock icons rather than
	trying to correctly re-mangle the ids. Display the Label with the
	accelerator underlined.

	* sample/GtkDemo/DemoTextView.cs (AttachWidgets): use
	Gtk.Image.LoadFromResource, so the image is properly loaded as an
	animation, not a static image. Don't set the combobox's "Active"
	property (for consistency with the C version).
	(InsertText): Fix miscellaneous differences with the C version.
	Remove some leftover cruft from earlier workarounds for gtk# bugs.

	* sample/GtkDemo/DemoTreeStore.cs (AddColumns): Make this more
	like the C version so the checkboxes are sensitized and hidden
	correctly on a per-row basis.

	* sample/GtkDemo/DemoUIManager.cs: Make the radio menu items work.

	* sample/GtkDemo/README: 
	* sample/GtkDemo/TODO: update

svn path=/trunk/gtk-sharp/; revision=42481
2005-04-01 21:08:14 +00:00

89 lines
2.4 KiB
C#

/* Color Selector
*
* GtkColorSelection lets the user choose a color. GtkColorSelectionDialog is
* a prebuilt dialog containing a GtkColorSelection.
*
*/
using System;
using Gdk;
using Gtk;
namespace GtkDemo
{
[Demo ("Color Selection", "DemoColorSelection.cs")]
public class DemoColorSelection : Gtk.Window
{
private Gdk.Color color;
private Gtk.DrawingArea drawingArea;
public DemoColorSelection () : base ("Color Selection")
{
BorderWidth = 8;
VBox vbox = new VBox (false,8);
vbox.BorderWidth = 8;
Add (vbox);
// Create the color swatch area
Frame frame = new Frame ();
frame.ShadowType = ShadowType.In;
vbox.PackStart (frame, true, true, 0);
drawingArea = new DrawingArea ();
drawingArea.ExposeEvent += new ExposeEventHandler (ExposeEventCallback);
// set a minimum size
drawingArea.SetSizeRequest (200,200);
// set the color
color = new Gdk.Color (0, 0, 0xff);
drawingArea.ModifyBg (StateType.Normal, color);
frame.Add (drawingArea);
Alignment alignment = new Alignment (1.0f, 0.5f, 0.0f, 0.0f);
Button button = new Button ("_Change the above color");
button.Clicked += new EventHandler (ChangeColorCallback);
alignment.Add (button);
vbox.PackStart (alignment);
ShowAll ();
}
protected override bool OnDeleteEvent (Gdk.Event evt)
{
Destroy ();
return true;
}
// Expose callback for the drawing area
private void ExposeEventCallback (object o, ExposeEventArgs args)
{
EventExpose eventExpose = args.Event;
Gdk.Window window = eventExpose.Window;
Rectangle area = eventExpose.Area;
window.DrawRectangle (drawingArea.Style.BackgroundGC (StateType.Normal),
true,
area.X, area.Y,
area.Width, area.Height);
args.RetVal = true;
}
private void ChangeColorCallback (object o, EventArgs args)
{
using (ColorSelectionDialog colorSelectionDialog = new ColorSelectionDialog ("Changing color")) {
colorSelectionDialog.TransientFor = this;
colorSelectionDialog.ColorSelection.PreviousColor = color;
colorSelectionDialog.ColorSelection.CurrentColor = color;
colorSelectionDialog.ColorSelection.HasPalette = true;
if (colorSelectionDialog.Run () == (int) ResponseType.Ok) {
Gdk.Color selected = colorSelectionDialog.ColorSelection.CurrentColor;
drawingArea.ModifyBg (StateType.Normal, selected);
}
colorSelectionDialog.Hide ();
}
}
}
}