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unit ZooThomVCL_ControlExperiment;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ComCtrls, Vcl.ExtCtrls, Vcl.StdCtrls,
System.Generics.Collections;
type
TZooThomVCLControlExperimentForm = class(TForm)
pgcControls: TPageControl;
tsTreeView: TTabSheet;
pgcTreeView: TPageControl;
tsTreeViewTextScrolling: TTabSheet;
pnlNormalScrollingTreeView: TPanel;
tvNormalScrolling: TTreeView;
pnlTextScrollingTreeView: TPanel;
tvTextScrolling: TTreeView;
ScrollBarTextScrollingTreeView: TScrollBar;
chkCustomDrawTextScrollingTreeView: TCheckBox;
pnlColumnTreeView: TPanel;
tvColumn: TTreeView;
chkCustomDrawColumnTreeView: TCheckBox;
pnlColumnTreeViewButtons: TPanel;
btnBtnTreeViewColumnAdd: TButton;
btnBtnTreeViewColumnDelete: TButton;
btnBtnTreeViewColumnNodeAdd: TButton;
chkCustomDrawTextScrollingTreeViewSpecial: TCheckBox;
procedure tvNormalScrollingDblClick(Sender: TObject);
procedure tvTextScrollingDblClick(Sender: TObject);
procedure tvTextScrollingChange(Sender: TObject; Node: TTreeNode);
procedure tvTextScrollingCollapsed(Sender: TObject; Node: TTreeNode);
procedure tvTextScrollingExpanded(Sender: TObject; Node: TTreeNode);
procedure pnlTextScrollingTreeViewResize(Sender: TObject);
procedure chkCustomDrawTextScrollingTreeViewClick(Sender: TObject);
procedure ScrollBarTextScrollingTreeViewChange(Sender: TObject);
procedure chkCustomDrawColumnTreeViewClick(Sender: TObject);
procedure btnBtnTreeViewColumnAddClick(Sender: TObject);
procedure btnBtnTreeViewColumnDeleteClick(Sender: TObject);
procedure btnBtnTreeViewColumnNodeAddClick(Sender: TObject);
procedure tvColumnDblClick(Sender: TObject);
private
{ Déclarations privées }
FTreeViewColWidths: System.Generics.Collections.TList<Integer>;
procedure ShowTreeControls(AControl: TWinControl; Node: TTreeNode);
procedure tvTextScrollingAdvancedCustomDrawItemEventHandler(Sender: TCustomTreeView; Node: TTreeNode; State: TCustomDrawState; Stage: TCustomDrawStage; var PaintImages, DefaultDraw: Boolean);
procedure tvColumnAdvancedCustomDrawItemEventHandler(Sender: TCustomTreeView; Node: TTreeNode; State: TCustomDrawState; Stage: TCustomDrawStage; var PaintImages, DefaultDraw: Boolean);
public
{ Déclarations publiques }
constructor Create(AOwner: TComponent); override;
destructor Destroy(); override;
end;
implementation
{$R *.dfm}
constructor TZooThomVCLControlExperimentForm.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FTreeViewColWidths := System.Generics.Collections.TList<Integer>.Create();
end;
destructor TZooThomVCLControlExperimentForm.Destroy();
begin
FreeAndNil(FTreeViewColWidths);
inherited Destroy();
end;
procedure TZooThomVCLControlExperimentForm.tvColumnAdvancedCustomDrawItemEventHandler(
Sender: TCustomTreeView; Node: TTreeNode; State: TCustomDrawState;
Stage: TCustomDrawStage; var PaintImages, DefaultDraw: Boolean);
var
Tree: TTreeView;
NodeRect: TRect;
ColIndex: Integer;
begin
if (Stage = cdPostPaint) and (Sender is TTreeView) then
begin
Tree := TTreeView(Sender);
NodeRect := Node.DisplayRect(True);
if NodeRect.Left > 0 then
begin
Tree.Canvas.TextOut(NodeRect.Left + 2, NodeRect.Top + 2, Node.Text);
for ColIndex := 0 to FTreeViewColWidths.Count - 1 do
Tree.Canvas.TextOut(NodeRect.Left + FTreeViewColWidths[ColIndex] + 2, NodeRect.Top + 2, Format('Col N°%d - %d [%s]', [ColIndex, FTreeViewColWidths[ColIndex], Node.Text]));
end;
end;
end;
procedure TZooThomVCLControlExperimentForm.tvColumnDblClick(Sender: TObject);
begin
ShowTreeControls(Self, tvColumn.Items.Add(nil, Self.ClassName));
// Change le Panel pour pouvoir jouer sur le redimensionnement de TTreeView
SetWindowLong(pnlColumnTreeView.Handle, GWL_STYLE,
GetWindowLong(pnlColumnTreeView.Handle, GWL_STYLE) or WS_SIZEBOX);
pnlColumnTreeView.Width := pnlColumnTreeView.Width - 1; // C'est le seul truc efficace pour que WS_SIZEBOX soit pris en compte, Invalidate, SetWindowPos, rien ne passe à part cette bidouille
end;
procedure TZooThomVCLControlExperimentForm.tvNormalScrollingDblClick(Sender: TObject);
begin
ShowTreeControls(Self, tvNormalScrolling.Items.Add(nil, Self.ClassName));
// Change le Panel pour pouvoir jouer sur le redimensionnement de TTreeView
SetWindowLong(pnlNormalScrollingTreeView.Handle, GWL_STYLE,
GetWindowLong(pnlNormalScrollingTreeView.Handle, GWL_STYLE) or WS_SIZEBOX);
pnlNormalScrollingTreeView.Width := pnlNormalScrollingTreeView.Width - 1; // C'est le seul truc efficace pour que WS_SIZEBOX soit pris en compte, Invalidate, SetWindowPos, rien ne passe à part cette bidouille
end;
procedure TZooThomVCLControlExperimentForm.btnBtnTreeViewColumnAddClick(Sender: TObject);
var
Value: string;
ColWidth: Integer;
begin
if InputQuery('Ajout d''une Colonne', 'Largeur ?', Value) then
begin
if TryStrToInt(Value, ColWidth) and (ColWidth > 0) then
begin
FTreeViewColWidths.Add(ColWidth);
tvColumn.Invalidate();
end;
end;
end;
procedure TZooThomVCLControlExperimentForm.btnBtnTreeViewColumnDeleteClick(Sender: TObject);
var
Value: string;
ColIndex: Integer;
begin
if InputQuery('Suppression d''une Colonne', 'Numéro (indice en base 0)', Value) then
begin
if TryStrToInt(Value, ColIndex) and ((0 <= ColIndex) and (ColIndex < FTreeViewColWidths.Count )) then
begin
FTreeViewColWidths.Delete(ColIndex);
tvColumn.Invalidate();
end;
end;
end;
procedure TZooThomVCLControlExperimentForm.btnBtnTreeViewColumnNodeAddClick(Sender: TObject);
begin
tvColumn.Items.AddChild(tvColumn.Selected, 'Node N°' + IntToStr(tvColumn.Items.Count)).MakeVisible();
end;
procedure TZooThomVCLControlExperimentForm.chkCustomDrawColumnTreeViewClick(Sender: TObject);
begin
if chkCustomDrawColumnTreeView.Checked then
tvColumn.OnAdvancedCustomDrawItem := tvColumnAdvancedCustomDrawItemEventHandler
else
tvColumn.OnAdvancedCustomDrawItem := nil;
tvColumn.Invalidate();
end;
procedure TZooThomVCLControlExperimentForm.chkCustomDrawTextScrollingTreeViewClick(Sender: TObject);
begin
if chkCustomDrawTextScrollingTreeView.Checked then
tvTextScrolling.OnAdvancedCustomDrawItem := tvTextScrollingAdvancedCustomDrawItemEventHandler
else
tvTextScrolling.OnAdvancedCustomDrawItem := nil;
tvTextScrolling.Invalidate();
end;
procedure TZooThomVCLControlExperimentForm.pnlTextScrollingTreeViewResize(Sender: TObject);
begin
// Pas de OnResize dans le TTreeView, j'utilise celui du panel
// Cela revient sans cesse !
if chkCustomDrawTextScrollingTreeViewSpecial.Checked then
ShowScrollBar(tvTextScrolling.Handle, SB_HORZ, False);
end;
procedure TZooThomVCLControlExperimentForm.ScrollBarTextScrollingTreeViewChange(Sender: TObject);
begin
if Assigned(tvTextScrolling.OnAdvancedCustomDrawItem) then
tvTextScrolling.Invalidate();
end;
procedure TZooThomVCLControlExperimentForm.ShowTreeControls(AControl: TWinControl; Node: TTreeNode);
var
I: Integer;
ChildNode: TTreeNode;
begin
For I := 0 to AControl.ControlCount - 1 do
begin
ChildNode := TTreeView(Node.TreeView).Items.AddChild(Node, Format('%s - Parent Node %d', [AControl.Controls[I].ClassName, Node.AbsoluteIndex]));
if AControl.Controls[I] is TWinControl then
ShowTreeControls(AControl.Controls[I] as TWinControl, ChildNode);
end;
end;
procedure TZooThomVCLControlExperimentForm.tvTextScrollingChange(Sender: TObject; Node: TTreeNode);
begin
// Cela revient sans cesse !
if chkCustomDrawTextScrollingTreeViewSpecial.Checked then
ShowScrollBar(tvTextScrolling.Handle, SB_HORZ, False);
end;
procedure TZooThomVCLControlExperimentForm.tvTextScrollingCollapsed(Sender: TObject; Node: TTreeNode);
begin
// Cela revient sans cesse !
if chkCustomDrawTextScrollingTreeViewSpecial.Checked then
ShowScrollBar(tvTextScrolling.Handle, SB_HORZ, False);
end;
procedure TZooThomVCLControlExperimentForm.tvTextScrollingAdvancedCustomDrawItemEventHandler(Sender: TCustomTreeView; Node: TTreeNode; State: TCustomDrawState; Stage: TCustomDrawStage; var PaintImages, DefaultDraw: Boolean);
var
NodeRect: TRect;
begin
if (Stage = cdPostPaint) and (Sender is TTreeView) then
begin
with TTreeView(Sender), Canvas do
begin
NodeRect := Node.DisplayRect(True); // True !!!
Brush.Style := bsSolid;
Brush.Color := clmoneygreen;
FillRect(NodeRect);
if chkCustomDrawTextScrollingTreeViewSpecial.Checked then
TextOut(NodeRect.Left, NodeRect.Top, Copy(Node.Text, ScrollBarTextScrollingTreeView.Position))
else
TextOut(NodeRect.Left, NodeRect.Top, Node.Text);
end;
end;
end;
procedure TZooThomVCLControlExperimentForm.tvTextScrollingDblClick(Sender: TObject);
begin
ShowTreeControls(Self, tvTextScrolling.Items.Add(nil, Self.ClassName));
if chkCustomDrawTextScrollingTreeViewSpecial.Checked then
ShowScrollBar(tvTextScrolling.Handle, SB_HORZ, False);
// Change le Panel pour pouvoir jouer sur le redimensionnement de TTreeView
SetWindowLong(pnlTextScrollingTreeView.Handle, GWL_STYLE,
GetWindowLong(pnlTextScrollingTreeView.Handle, GWL_STYLE) or WS_SIZEBOX);
pnlTextScrollingTreeView.Width := pnlTextScrollingTreeView.Width - 1; // C'est le seul truc efficace pour que WS_SIZEBOX soit pris en compte, Invalidate, SetWindowPos, rien ne passe à part cette bidouille
end;
procedure TZooThomVCLControlExperimentForm.tvTextScrollingExpanded(Sender: TObject; Node: TTreeNode);
begin
// Cela revient sans cesse !
if chkCustomDrawTextScrollingTreeViewSpecial.Checked then
ShowScrollBar(tvTextScrolling.Handle, SB_HORZ, False);
end;
end. |
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