GtkSharp/sample/GtkDemo/DemoSizeGroup.cs
Bertrand Lorentz 3a2f01c534 sample: Port all existing GtkDemo samples to the new APIs
The following samples crash because of an issue with the new Drawn
handler: ColorSelection, DrawingArea and Pixbuf.
The rest seem to work OK.
2011-06-18 19:21:21 +02:00

131 lines
3.6 KiB
C#

/* Size Groups
*
* SizeGroup provides a mechanism for grouping a number of
* widgets together so they all request the same amount of space.
* This is typically useful when you want a column of widgets to
* have the same size, but you can't use a Table widget.
*
* Note that size groups only affect the amount of space requested,
* not the size that the widgets finally receive. If you want the
* widgets in a SizeGroup to actually be the same size, you need
* to pack them in such a way that they get the size they request
* and not more. For example, if you are packing your widgets
* into a table, you would not include the Gtk.Fill flag.
*/
using System;
using Gtk;
namespace GtkDemo
{
[Demo ("Size Group", "DemoSizeGroup.cs")]
public class DemoSizeGroup : Dialog
{
private SizeGroup sizeGroup;
static string [] colors = { "Red", "Green", "Blue" };
static string [] dashes = { "Solid", "Dashed", "Dotted" };
static string [] ends = { "Square", "Round", "Arrow" };
public DemoSizeGroup () : base ("SizeGroup", null, DialogFlags.DestroyWithParent,
Gtk.Stock.Close, Gtk.ResponseType.Close)
{
Resizable = false;
VBox vbox = new VBox (false, 5);
this.ContentArea.PackStart (vbox, true, true, 0);
vbox.BorderWidth = 5;
sizeGroup = new SizeGroup (SizeGroupMode.Horizontal);
// Create one frame holding color options
Frame frame = new Frame ("Color Options");
vbox.PackStart (frame, true, true, 0);
Table table = new Table (2, 2, false);
table.BorderWidth = 5;
table.RowSpacing = 5;
table.ColumnSpacing = 10;
frame.Add (table);
AddRow (table, 0, sizeGroup, "_Foreground", colors);
AddRow (table, 1, sizeGroup, "_Background", colors);
// And another frame holding line style options
frame = new Frame ("Line Options");
vbox.PackStart (frame, false, false, 0);
table = new Table (2, 2, false);
table.BorderWidth = 5;
table.RowSpacing = 5;
table.ColumnSpacing = 10;
frame.Add (table);
AddRow (table, 0, sizeGroup, "_Dashing", dashes);
AddRow (table, 1, sizeGroup, "_Line ends", ends);
// And a check button to turn grouping on and off
CheckButton checkButton = new CheckButton ("_Enable grouping");
vbox.PackStart (checkButton, false, false, 0);
checkButton.Active = true;
checkButton.Toggled += new EventHandler (ToggleGrouping);
ShowAll ();
}
// Convenience function to create a combo box holding a number of strings
private ComboBox CreateComboBox (string [] strings)
{
ComboBoxText combo = new ComboBoxText ();
foreach (string str in strings)
combo.AppendText (str);
combo.Active = 0;
return combo;
}
private void AddRow (Table table, uint row, SizeGroup sizeGroup, string labelText, string [] options)
{
Label label = new Label (labelText);
label.SetAlignment (0, 1);
table.Attach (label,
0, 1, row, row + 1,
AttachOptions.Expand | AttachOptions.Fill, 0,
0, 0);
ComboBox combo = CreateComboBox (options);
label.MnemonicWidget = combo;
sizeGroup.AddWidget (combo);
table.Attach (combo,
1, 2, row, row + 1,
0, 0,
0, 0);
}
private void ToggleGrouping (object o, EventArgs args)
{
ToggleButton checkButton = (ToggleButton)o;
// SizeGroupMode.None is not generally useful, but is useful
// here to show the effect of SizeGroupMode.Horizontal by
// contrast
SizeGroupMode mode;
if (checkButton.Active)
mode = SizeGroupMode.Horizontal;
else
mode = SizeGroupMode.None;
sizeGroup.Mode = mode;
}
protected override void OnResponse (Gtk.ResponseType responseId)
{
Destroy ();
}
}
}