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// CustomCellRenderer.cs : C# implementation of an example custom cellrenderer
// from http://scentric.net/tutorial/sec-custom-cell-renderers.html
//
// Author: Todd Berman <tberman@sevenl.net>
//
// (c) 2004 Todd Berman
using System;
using Gtk;
using Gdk;
using GLib;
public class CustomCellRenderer : CellRenderer
{
private float percent;
public float Percentage
{
get {
return percent;
}
set {
percent = value;
}
}
public override void GetSize (Widget widget, ref Rectangle cell_area, out int x_offset, out int y_offset, out int width, out int height)
{
int calc_width = (int) this.Xpad * 2 + 100;
int calc_height = (int) this.Ypad * 2 + 10;
width = calc_width;
height = calc_height;
x_offset = 0;
y_offset = 0;
if (!cell_area.Equals (Rectangle.Zero)) {
x_offset = (int) (this.Xalign * (cell_area.Width - calc_width));
x_offset = Math.Max (x_offset, 0);
y_offset = (int) (this.Yalign * (cell_area.Height - calc_height));
y_offset = Math.Max (y_offset, 0);
}
}
protected override void Render (Drawable window, Widget widget, Rectangle background_area, Rectangle cell_area, Rectangle expose_area, CellRendererState flags)
{
int width = 0, height = 0, x_offset = 0, y_offset = 0;
StateType state;
GetSize (widget, ref cell_area, out x_offset, out y_offset, out width, out height);
if (widget.HasFocus)
state = StateType.Active;
else
state = StateType.Normal;
width -= (int) this.Xpad * 2;
height -= (int) this.Ypad * 2;
//FIXME: Style.PaintBox needs some customization so that if you pass it
//a Gdk.Rectangle.Zero it gives a clipping area big enough to draw
//everything
Gdk.Rectangle clipping_area = new Gdk.Rectangle ((int) (cell_area.X + x_offset + this.Xpad), (int) (cell_area.Y + y_offset + this.Ypad), width - 1, height - 1);
Style.PaintBox (widget.Style, (Gdk.Window) window, StateType.Normal, ShadowType.In, clipping_area, widget, "trough", (int) (cell_area.X + x_offset + this.Xpad), (int) (cell_area.Y + y_offset + this.Ypad), width - 1, height - 1);
Gdk.Rectangle clipping_area2 = new Gdk.Rectangle ((int) (cell_area.X + x_offset + this.Xpad), (int) (cell_area.Y + y_offset + this.Ypad), (int) (width * Percentage), height - 1);
Style.PaintBox (widget.Style, (Gdk.Window) window, state, ShadowType.Out, clipping_area2, widget, "bar", (int) (cell_area.X + x_offset + this.Xpad), (int) (cell_area.Y + y_offset + this.Ypad), (int) (width * Percentage), height - 1);
}
}
public class Driver : Gtk.Window
{
public static void Main ()
{
Application.Init ();
new Driver ();
Application.Run ();
}
ListStore liststore;
void ProgressData (Gtk.TreeViewColumn tree_column, Gtk.CellRenderer cell, Gtk.TreeModel tree_model, Gtk.TreeIter iter)
{
float perc = (float) liststore.GetValue (iter, 0);
((CustomCellRenderer)cell).Percentage = perc;
}
public Driver () : base ("CustomCellRenderer")
{
DefaultSize = new Size (150, 100);
this.DeleteEvent += new DeleteEventHandler (window_delete);
liststore = new ListStore (typeof (float), typeof (string));
liststore.AppendValues (0.5f, "50%");
TreeView view = new TreeView (liststore);
view.AppendColumn ("Progress", new CellRendererText (), "text", 1);
//Note: This *MUST* be done here, as its the only place Progress is
//accessible. Maybe there should be an attribute that will do some
//magic for you and register a property with the gobject system.
view.AppendColumn ("Progress", new CustomCellRenderer (), new TreeCellDataFunc (ProgressData));
this.Add (view);
this.ShowAll ();
GLib.Timeout.Add (50, new GLib.TimeoutHandler (update_percent));
}
bool increasing = true;
bool update_percent ()
{
TreeIter iter;
liststore.GetIterFirst (out iter);
float perc = (float) liststore.GetValue (iter, 0);
if ((perc > 0.99) || (perc < 0.01 && perc > 0)) {
increasing = !increasing;
}
if (increasing)
perc += 0.01f;
else
perc -= 0.01f;
liststore.SetValue (iter, 0, perc);
liststore.SetValue (iter, 1, Convert.ToInt32 (perc * 100) + "%");
return true;
}
void window_delete (object obj, DeleteEventArgs args)
{
Application.Quit ();
args.RetVal = true;
}
}
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