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
|
program treeviewtest;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}{$IFDEF UseCThreads}
cthreads,
{$ENDIF}{$ENDIF}
Classes,
SysUtils,
fpg_base,
fpg_main,
fpg_form,
fpg_tree,
fpg_checkbox,
fpg_imagelist;
type
{ TMainForm }
TMainForm = class(TfpgForm)
private
tree: TfpgTreeView;
imagelist: TfpgImageList;
cbShowImages: TfpgCheckBox;
cbIndentNode: TfpgCheckBox;
procedure cbShowImagesChange(Sender: TObject);
procedure cbIndentNodeChange(Sender: TObject);
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
end;
{ TMainForm }
procedure TMainForm.cbIndentNodeChange(Sender: TObject);
begin
tree.IndentNodeWithNoImage := cbIndentNode.Checked;
end;
procedure TMainForm.cbShowImagesChange(Sender: TObject);
begin
tree.ShowImages := cbShowImages.Checked;
end;
constructor TMainForm.Create(AOwner: TComponent);
var
n: TfpgTreeNode;
n2: TfpgTreeNode;
i: integer;
s: string;
begin
inherited Create(AOwner);
WindowTitle := 'Treeview Test';
WindowPosition := wpUser;
SetPosition(100, 100, 300, 230);
// create a image list
imagelist := TfpgImageList.Create;
imagelist.AddItemFromFile(SetDirSeparators('../../../images/folder_16.bmp'), 0);
imagelist.AddItemFromFile(SetDirSeparators('../../../images/menu_preferences_16.bmp'), 1);
imagelist.Item[1].Image.CreateMaskFromSample(0, 0);
imagelist.Item[1].Image.UpdateImage;
// create a treeview
tree := TfpgTreeView.Create(self);
tree.SetPosition(8, 8, Width-16, 200-16);
tree.Anchors := [anTop, anLeft, anRight, anBottom];
// tree.ShowColumns := True;
// tree.TreeLineStyle := lsSolid;
tree.ScrollWheelDelta := 30;
tree.ImageList := imagelist;
tree.ShowImages := True;
n := tree.RootNode.AppendText('Node 1');
n.ImageIndex := 0;
n.AppendText('Node 1.1').ImageIndex := 1;
n.AppendText('Node 1.2').ImageIndex := 1;
n := tree.RootNode.AppendText('Node 2');
n.ImageIndex := 0;
n.AppendText('Node 2.1').ImageIndex := 1;
n := n.AppendText('Node 2.2 The quick brownfox jumps over the...');
n.ImageIndex := 1;
for i := 1 to 3 do
begin
s := Format('Node 2.2.%d', [i]);
if i = 2 then
n2 := n.AppendText(s)
else
n.AppendText(s);
end;
n.Parent.AppendText('Node 2.3');
tree.RootNode.FirstSubNode.Next.Collapse;
tree.RootNode.AppendText('Node 3').ImageIndex := 0;
tree.Selection := n;
// n := tree.RootNode.FindSubNode('Node 2.2.2', True);
if Assigned(n2) then
begin
n2.AppendText('Child 1').AppendText('Child 2');
n2.Collapsed := False;
end;
// create a checkbox
cbShowImages := CreateCheckBox(self, 8, 204, 'Show images');
cbShowImages.Checked := True;
cbShowImages.OnChange := @cbShowImagesChange;
cbShowImages.Anchors := [anLeft, anBottom];
// create a checkbox
cbIndentNode := CreateCheckBox(self, 120, 204, 'Indent node with no image');
cbIndentNode.Checked := True;
cbIndentNode.OnChange := @cbIndentNodeChange;
cbIndentNode.Anchors := [anLeft, anBottom];
end;
destructor TMainForm.Destroy;
begin
tree.ImageList := nil;
imagelist.Free;
inherited Destroy;
end;
procedure MainProc;
var
frm: TMainForm;
begin
fpgApplication.Initialize;
frm := TMainForm.Create(nil);
try
frm.Show;
fpgApplication.Run;
finally
frm.Free;
end;
end;
begin
MainProc;
end.
|
