Componentes.Terceros.DevExpressVCL/official/x.19/ExpressQuantumTreeList 4/Demos/Delphi/DragDropDemo/DragDropDemoMain.pas

unit DragDropDemoMain;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
  cxStyles, cxTL, cxMaskEdit, cxCurrencyEdit, cxMemo, cxCheckBox, Menus,
  cxLookAndFeels, ActnList, ImgList, cxInplaceContainer, cxDBTL,
  cxControls, cxTLData, ComCtrls, StdCtrls, DemoBasicMain, ExtCtrls,
  cxGraphics, cxCustomData;

type
  TcxDragSenderType = (dotDepart, dotPers, dotNone);

  TDragDropDemoMainForm = class(TDemoBasicMainForm)
    miSeparator1: TMenuItem;
    miGridLookFeel: TMenuItem;
    miKind: TMenuItem;
    miFlat: TMenuItem;
    miStandard: TMenuItem;
    miUltraFlat: TMenuItem;
    miNativeStyle: TMenuItem;
    miSeparator2: TMenuItem;
    miColumnCustomization: TMenuItem;
    Splitter1: TSplitter;
    pnlDepartments: TPanel;
    tlDepartments: TcxDBTreeList;
    tlDepartmentsID: TcxDBTreeListColumn;
    tlDepartmentsPARENTID: TcxDBTreeListColumn;
    tlDepartmentsNAME: TcxDBTreeListColumn;
    tlDepartmentsBUDGET: TcxDBTreeListColumn;
    tlDepartmentsPHONE: TcxDBTreeListColumn;
    tlDepartmentsFAX: TcxDBTreeListColumn;
    tlDepartmentsEMAIL: TcxDBTreeListColumn;
    tlDepartmentsVACANCY: TcxDBTreeListColumn;
    pnlDeptCaption: TPanel;
    pnlEmployees: TPanel;
    pnlEmplCaption: TPanel;
    tlEmployees: TcxDBTreeList;
    tlEmployeesName: TcxDBTreeListColumn;
    tlEmployeesCountry: TcxDBTreeListColumn;
    tlEmployeesPostalCode: TcxDBTreeListColumn;
    tlEmployeesCity: TcxDBTreeListColumn;
    tlEmployeesAddress: TcxDBTreeListColumn;
    tlEmployeesPhone: TcxDBTreeListColumn;
    tlEmployeesFax: TcxDBTreeListColumn;
    tlEmployeesEMAIL: TcxDBTreeListColumn;
    tlEmployeesHOMEPAGE: TcxDBTreeListColumn;
    tlEmployeesDepartmentID: TcxDBTreeListColumn;
    N1: TMenuItem;
    miDragExpande: TMenuItem;
    miDragCollapse: TMenuItem;
    N2: TMenuItem;
    ShowDictionaries1: TMenuItem;
    Office111: TMenuItem;
    procedure FormShow(Sender: TObject);
    procedure LookAndFeelChange(Sender: TObject);
    procedure miColumnCustomizationClick(Sender: TObject);
    procedure miDragCollapseClick(Sender: TObject);
    procedure miDragExpandeClick(Sender: TObject);
    procedure ShowDictionaries1Click(Sender: TObject);
    procedure tlDepartmentsInitInsertingRecord(Sender: TObject;
      AFocusedNode: TcxTreeListDataNode; var AHandled: Boolean);
    procedure tlDepartmentsDragDrop(Sender, Source: TObject; X,
      Y: Integer);
    procedure tlDepartmentsDragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
    procedure tlEmployeesDragDrop(Sender, Source: TObject; X, Y: Integer);
    procedure tlEmployeesDragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
    procedure tlEmployeesMoveTo(Sender: TObject;
      AttachNode: TcxTreeListNode; AttachMode: TcxTreeListNodeAttachMode;
      Nodes: TList; var IsCopy, Done: Boolean);
  private
    function IsHitAtNode(ATreeList: TcxDBTreeList; X, Y: Integer): Boolean;
    procedure SetEmplDictSelectionDeptID(AValue: Variant);
  end;

var
  DragDropDemoMainForm: TDragDropDemoMainForm;

implementation

uses DragDropDemoData, ShellAPI, DB, Dialogs, DragDropDemoDictionary;

{$R *.dfm}

procedure TDragDropDemoMainForm.FormShow(Sender: TObject);
begin
  tlDepartments.FullExpand;
  DragDropDemoDictionaryForm.Show;

{ remove/add the closing brace on this line to disable/enable the following code

  ShowMessage('WARNING: tutorial not completed. First, please apply the steps '+
              'shown in the doc file');

//}
end;

procedure TDragDropDemoMainForm.LookAndFeelChange(Sender: TObject);
begin
  if TMenuItem(Sender).Tag > 3 then
  begin
    cxLookAndFeelController.NativeStyle :=
      not cxLookAndFeelController.NativeStyle;
    TMenuItem(Sender).Checked := cxLookAndFeelController.NativeStyle;
  end
  else
  begin
    TMenuItem(Sender).Checked := True;
    cxLookAndFeelController.Kind := TcxLookAndFeelKind(TMenuItem(Sender).Tag);
    cxLookAndFeelController.NativeStyle := False;
    miNativeStyle.Checked := False;
  end;
end;

procedure TDragDropDemoMainForm.miColumnCustomizationClick(Sender: TObject);
begin
  tlDepartments.Customizing.Visible := True;
end;

procedure TDragDropDemoMainForm.miDragCollapseClick(Sender: TObject);
begin
  TMenuItem(Sender).Checked := not TMenuItem(Sender).Checked;
  tlDepartments.OptionsBehavior.DragCollapse := TMenuItem(Sender).Checked;
end;

procedure TDragDropDemoMainForm.miDragExpandeClick(Sender: TObject);
begin
  TMenuItem(Sender).Checked := not TMenuItem(Sender).Checked;
  tlDepartments.OptionsBehavior.DragExpand := TMenuItem(Sender).Checked;
end;

procedure TDragDropDemoMainForm.ShowDictionaries1Click(Sender: TObject);
begin
  DragDropDemoDictionaryForm.Show;
end;

procedure TDragDropDemoMainForm.tlDepartmentsInitInsertingRecord(
  Sender: TObject; AFocusedNode: TcxTreeListDataNode;
  var AHandled: Boolean);
begin
  if AFocusedNode <> nil then
    DragDropDemoDataDM.SetParentValue(AFocusedNode.ParentValue);
end;

procedure TDragDropDemoMainForm.tlDepartmentsDragDrop(Sender,
  Source: TObject; X, Y: Integer);
  function IsDropAsChild: Boolean;
  begin
    with TcxDBTreeList(Sender) do
      Result := not (HitTest.HitAtIndent or HitTest.HitAtIndicator)
  end;
var
  AHitNode: TcxTreeListDataNode;
begin
{ remove/add the closing brace on this line to disable/enable the following code}

  if (Sender = Source) or not IsHitAtNode(TcxDBTreeList(Sender), X, Y) then
    Exit;
  AHitNode := TcxTreeListDataNode(TcxDBTreeList(Sender).HitTest.HitNode);
  with DragDropDemoDictionaryForm do
    if Source = tlDeptDict then
    begin
      if IsDropAsChild then
        SetDeptSelectionParentValue(AHitNode.KeyValue)
      else
        SetDeptSelectionParentValue(AHitNode.ParentValue);
      TcxDBTreeList(Sender).DataController.DataSet.Refresh;
    end
    else
    begin
      if Source = tlEmplDict then
        SetEmplDictSelectionDeptID(AHitNode.KeyValue)
      else
        SetSelectedNodesValue(tlEmployees, tlEmployeesDepartmentID.ItemIndex,
          AHitNode.KeyValue);
    end;

//}
end;

procedure TDragDropDemoMainForm.tlDepartmentsDragOver(Sender,
  Source: TObject; X, Y: Integer; State: TDragState; var Accept: Boolean);
begin
{ remove/add the closing brace on this line to disable/enable the following code}

  Accept := IsHitAtNode(TcxDBTreeList(Sender), X, Y);

//}
end;

procedure TDragDropDemoMainForm.tlEmployeesDragDrop(Sender, Source: TObject;
  X, Y: Integer);
var
  AValue: Variant;
begin
{ remove/add the closing brace on this line to disable/enable the following code}

  if Source = DragDropDemoDictionaryForm.tlEmplDict then
  begin
    if tlDepartments.FocusedNode <> nil then
      AValue := TcxTreeListDataNode(tlDepartments.FocusedNode).KeyValue
    else
      AValue := -1;
    SetEmplDictSelectionDeptID(AValue)
  end;

//}
end;

procedure TDragDropDemoMainForm.tlEmployeesDragOver(Sender, Source: TObject;
  X, Y: Integer; State: TDragState; var Accept: Boolean);
begin
{ remove/add the closing brace on this line to disable/enable the following code}

  Accept := (Source = DragDropDemoDictionaryForm.tlEmplDict);

//}
end;

procedure TDragDropDemoMainForm.tlEmployeesMoveTo(Sender: TObject;
  AttachNode: TcxTreeListNode; AttachMode: TcxTreeListNodeAttachMode;
  Nodes: TList; var IsCopy, Done: Boolean);
begin
{ remove/add the closing brace on this line to disable/enable the following code}

  Done := True;

//}
end;

function TDragDropDemoMainForm.IsHitAtNode(ATreeList: TcxDBTreeList; X,
  Y: Integer): Boolean;
begin
  with ATreeList do
  begin
    HitTest.ReCalculate(Point(X,Y));
    Result := HitTest.HitAtNode;
  end;
end;

procedure TDragDropDemoMainForm.SetEmplDictSelectionDeptID(AValue: Variant);
begin
  DragDropDemoDictionaryForm.SetEmplSelectionDeptID(AValue);
  tlEmployees.DataController.DataSet.Close;
  tlEmployees.DataController.DataSet.Open;
end;

end.