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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_button,
fpg_imagelist;
type
TMainForm = class(TfpgForm)
private
{@VFD_HEAD_BEGIN: MainForm}
tree: TfpgTreeView;
cbShowImages: TfpgCheckBox;
cbIndentNode: TfpgCheckBox;
btnClear: TfpgButton;
{@VFD_HEAD_END: MainForm}
FImagelist: TfpgImageList;
procedure cbShowImagesChange(Sender: TObject);
procedure cbIndentNodeChange(Sender: TObject);
procedure btnClearClicked(Sender: TObject);
procedure PopulateTree;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure AfterCreate; override;
end;
{ TMainForm }
procedure TMainForm.cbIndentNodeChange(Sender: TObject);
begin
tree.IndentNodeWithNoImage := cbIndentNode.Checked;
end;
procedure TMainForm.btnClearClicked(Sender: TObject);
var
n: TfpgTreeNode;
begin
if tree.Selection <> nil then
begin
n := tree.Selection;
tree.Selection.Clear;
tree.Invalidate;
tree.Selection := n;
end;
end;
procedure TMainForm.PopulateTree;
var
n: TfpgTreeNode;
i: integer;
n2: TfpgTreeNode;
s: TfpgString;
begin
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;
end;
procedure TMainForm.cbShowImagesChange(Sender: TObject);
begin
tree.ShowImages := cbShowImages.Checked;
end;
constructor TMainForm.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
// create a image list
FImagelist := TfpgImageList.Create;
FImagelist.AddItemFromFile(SetDirSeparators('../../../images/folder_16.bmp'), 0);
FImagelist.AddItemFromFile(SetDirSeparators('../../../images/menu_preferences_16.bmp'), 1);
FImagelist.Item[1].Image.CreateMaskFromSample(0, 0);
FImagelist.Item[1].Image.UpdateImage;
end;
destructor TMainForm.Destroy;
begin
tree.ImageList := nil;
FImagelist.Free;
inherited Destroy;
end;
procedure TMainForm.AfterCreate;
begin
inherited AfterCreate;
{@VFD_BODY_BEGIN: MainForm}
Name := 'MainForm';
SetPosition(294, 174, 300, 250);
WindowTitle := 'Treeview Test';
WindowPosition := wpScreenCenter;
tree := TfpgTreeView.Create(self);
with tree do
begin
Name := 'tree';
SetPosition(8, 8, 284, 184);
Anchors := [anLeft,anRight,anTop,anBottom];
FontDesc := '#Label1';
ScrollWheelDelta := 30;
ShowImages := True;
ImageList := FImagelist;
end;
cbShowImages := TfpgCheckBox.Create(self);
with cbShowImages do
begin
Name := 'cbShowImages';
SetPosition(8, 200, 109, 20);
Anchors := [anLeft,anBottom];
Checked := True;
FontDesc := '#Label1';
TabOrder := 1;
Text := 'Show images';
OnChange := @cbShowImagesChange;
end;
cbIndentNode := TfpgCheckBox.Create(self);
with cbIndentNode do
begin
Name := 'cbIndentNode';
SetPosition(120, 200, 179, 20);
Anchors := [anLeft,anBottom];
Checked := True;
FontDesc := '#Label1';
TabOrder := 2;
Text := 'Indent node with no image';
OnChange := @cbIndentNodeChange;
end;
btnClear := TfpgButton.Create(self);
with btnClear do
begin
Name := 'btnClear';
SetPosition(8, 222, 144, 23);
Text := 'Clear Selected Node';
FontDesc := '#Label1';
Hint := '';
ImageName := '';
TabOrder := 3;
OnClick := @btnClearClicked;
end;
{@VFD_BODY_END: MainForm}
PopulateTree;
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.
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