1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
//
// DemoSizeGroup.cs
//
// Author: Duncan Mak (duncan@ximian.com)
//
// Copyright (C) 2002, Duncan Mak, Ximian Inc.
//
/* 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
{
public class DemoSizeGroup : Dialog
{
private SizeGroup sizeGroup;
public DemoSizeGroup ()
{
this.Title = "Size groups";
this.Resizable = false;
VBox vbox = new VBox (false, 5);
this.VBox.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);
string [] colors = {"Red", "Green", "Blue", };
string [] dashes = {"Solid", "Dashed", "Dotted", };
string [] ends = {"Square", "Round", "Arrow", };
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 (ButtonToggleCb);
Button CloseButton = new Button (Stock.Close);
this.AddActionWidget (CloseButton, ResponseType.Close);
this.Response += new ResponseHandler (ResponseCallback);
this.ShowAll ();
}
// Convenience function to create an option menu holding a number of strings
private OptionMenu CreateOptionMenu (string [] strings)
{
Menu menu = new Menu ();
MenuItem menuItem;
foreach (string str in strings)
{
menuItem = new MenuItem (str);
menuItem.Show ();
menu.Append (menuItem);
}
OptionMenu optionMenu = new OptionMenu ();
optionMenu.Menu = menu;
return optionMenu;
}
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);
OptionMenu optionMenu = CreateOptionMenu (options);
sizeGroup.AddWidget (optionMenu);
table.Attach (optionMenu,
1, 2, row, row + 1,
AttachOptions.Expand, AttachOptions.Expand,
0, 0);
}
private void ButtonToggleCb (object o, EventArgs args)
{
ToggleGrouping ((ToggleButton) o, sizeGroup);
}
// SizeGroupMode.None is not generally useful, but is useful
// here to show the effect of SizeGroupMode.Horizontal by
// contrast
private void ToggleGrouping (ToggleButton checkButton, SizeGroup sizeGroup)
{
SizeGroupMode mode;
if (checkButton.Active)
mode = SizeGroupMode.Horizontal;
else
mode = SizeGroupMode.None;
sizeGroup.Mode = mode;
}
private void ResponseCallback (object obj, ResponseArgs args)
{
if ((args.ResponseId) == ResponseType.Close) {
this.Hide ();
this.Destroy ();
}
}
}
}
|
