Changeset 75 for trunk/Packages/Common/ListViewSort.pas

Timestamp:

Jun 4, 2024, 12:22:49 AM (5 months ago)

Author:

chronos

Message:

• Modified: Removed U prefix from unit names.
• Modified: Updated Common package.

File:

• trunk/Packages/Common/ListViewSort.pas (moved) (moved from trunk/Packages/Common/UListViewSort.pas ) (21 diffs)

trunk/Packages/Common/ListViewSort.pas

@@ -1 @@
-unit UListViewSort;
-
-// Date: 2010-11-03
-
-{$mode delphi}
+unit ListViewSort;
+
+// Date: 2019-05-17
 
 interface
 
 uses
-  {$IFDEF Windows}Windows, CommCtrl, {$ENDIF}Classes, Graphics, ComCtrls, SysUtils,
-  Controls, DateUtils, Dialogs, SpecializedList, Forms, Grids, StdCtrls, ExtCtrls;
+  {$IFDEF Windows}Windows, CommCtrl, LMessages, {$ENDIF}Classes, Graphics, ComCtrls, SysUtils,
+  Controls, DateUtils, Dialogs, Forms, Grids, StdCtrls, ExtCtrls,
+  LclIntf, LclType, LResources, Generics.Collections, Generics.Defaults;
 
 type
@@ -18 +17 @@
   TCompareEvent = function (Item1, Item2: TObject): Integer of object;
   TListFilterEvent = procedure (ListViewSort: TListViewSort) of object;
+
+  TObjects = TObjectList<TObject>;
+
+  { TListViewSort }
 
   TListViewSort = class(TComponent)
@@ -28 +31 @@
     FColumn: Integer;
     FOrder: TSortOrder;
+    FOldListViewWindowProc: TWndMethod;
+    FOnColumnWidthChanged: TNotifyEvent;
+    procedure DoColumnBeginResize(const AColIndex: Integer);
+    procedure DoColumnResized(const AColIndex: Integer);
+    procedure DoColumnResizing(const AColIndex, AWidth: Integer);
     procedure SetListView(const Value: TListView);
     procedure ColumnClick(Sender: TObject; Column: TListColumn);
@@ -40 +48 @@
     procedure SetColumn(const Value: Integer);
     procedure SetOrder(const Value: TSortOrder);
+    {$IFDEF WINDOWS}
+    procedure NewListViewWindowProc(var AMsg: TMessage);
+    {$ENDIF}
   public
-    List: TListObject;
-    Source: TListObject;
+    Source: TObjects;
+    List: TObjects;
     constructor Create(AOwner: TComponent); override;
     destructor Destroy; override;
@@ -58 +69 @@
     property OnCustomDraw: TLVCustomDrawItemEvent read FOnCustomDraw
       write FOnCustomDraw;
+    property OnColumnWidthChanged: TNotifyEvent read FOnColumnWidthChanged
+      write FOnColumnWidthChanged;
     property Column: Integer read FColumn write SetColumn;
     property Order: TSortOrder read FOrder write SetOrder;
@@ -68 +81 @@
     FOnChange: TNotifyEvent;
     FStringGrid1: TStringGrid;
-    procedure DoOnKeyUp(Sender: TObject; var Key: Word; Shift: TShiftState);
+    procedure DoOnChange;
+    procedure GridDoOnKeyUp(Sender: TObject; var Key: Word; Shift: TShiftState);
+    procedure GridDoOnResize(Sender: TObject);
   public
     constructor Create(AOwner: TComponent); override;
     procedure UpdateFromListView(ListView: TListView);
     function TextEntered: Boolean;
+    function TextEnteredCount: Integer;
+    function TextEnteredColumn(Index: Integer): Boolean;
     function GetColValue(Index: Integer): string;
+    procedure Reset;
     property StringGrid: TStringGrid read FStringGrid1 write FStringGrid1;
   published
@@ -79 +97 @@
     property Align;
     property Anchors;
+    property BorderSpacing;
+  end;
+
+  { TListViewEx }
+
+  TListViewEx = class(TWinControl)
+  private
+    FFilter: TListViewFilter;
+    FListView: TListView;
+    FListViewSort: TListViewSort;
+    procedure ResizeHanlder;
+  public
+    constructor Create(TheOwner: TComponent); override;
+    destructor Destroy; override;
+  published
+    property ListView: TListView read FListView write FListView;
+    property ListViewSort: TListViewSort read FListViewSort write FListViewSort;
+    property Filter: TListViewFilter read FFilter write FFilter;
+    property Visible;
   end;
 
@@ -88 +125 @@
 procedure Register;
 begin
-  RegisterComponents('Common', [TListViewSort, TListViewFilter]);
+  RegisterComponents('Common', [TListViewSort, TListViewFilter, TListViewEx]);
+end;
+
+{ TListViewEx }
+
+procedure TListViewEx.ResizeHanlder;
+begin
+end;
+
+constructor TListViewEx.Create(TheOwner: TComponent);
+begin
+  inherited Create(TheOwner);
+  Filter := TListViewFilter.Create(Self);
+  Filter.Parent := Self;
+  Filter.Align := alBottom;
+  ListView := TListView.Create(Self);
+  ListView.Parent := Self;
+  ListView.Align := alClient;
+  ListViewSort := TListViewSort.Create(Self);
+  ListViewSort.ListView := ListView;
+end;
+
+destructor TListViewEx.Destroy;
+begin
+  inherited;
 end;
 
 { TListViewFilter }
 
-procedure TListViewFilter.DoOnKeyUp(Sender: TObject; var Key: Word;
+procedure TListViewFilter.DoOnChange;
+begin
+  if Assigned(FOnChange) then FOnChange(Self);
+end;
+
+procedure TListViewFilter.GridDoOnKeyUp(Sender: TObject; var Key: Word;
   Shift: TShiftState);
 begin
-  if Assigned(FOnChange) then
-    FOnChange(Self);
+  DoOnChange;
+end;
+
+procedure TListViewFilter.GridDoOnResize(Sender: TObject);
+begin
+  FStringGrid1.DefaultRowHeight := FStringGrid1.Height;
 end;
 
@@ -113 +183 @@
   FStringGrid1.Options := [goFixedHorzLine, goFixedVertLine, goVertLine,
     goHorzLine, goRangeSelect, goEditing, goAlwaysShowEditor, goSmoothScroll];
-  FStringGrid1.OnKeyUp := DoOnKeyUp;
+  FStringGrid1.OnKeyUp := GridDoOnKeyUp;
+  FStringGrid1.OnResize := GridDoOnResize;
 end;
 
@@ -119 +190 @@
 var
   I: Integer;
-  NewColumn: TGridColumn;
+  R: TRect;
 begin
   with FStringGrid1 do begin
-    Columns.Clear;
     while Columns.Count > ListView.Columns.Count do Columns.Delete(Columns.Count - 1);
-    while Columns.Count < ListView.Columns.Count do NewColumn := Columns.Add;
+    while Columns.Count < ListView.Columns.Count do Columns.Add;
     for I := 0 to ListView.Columns.Count - 1 do begin
       Columns[I].Width := ListView.Columns[I].Width;
+      if Selection.Left = I then begin
+        R := CellRect(I, 0);
+        Editor.Left := R.Left + 2;
+        Editor.Width := R.Width - 4;
+      end;
     end;
   end;
@@ -132 +207 @@
 
 function TListViewFilter.TextEntered: Boolean;
+begin
+  Result := TextEnteredCount > 0;
+end;
+
+function TListViewFilter.TextEnteredCount: Integer;
 var
   I: Integer;
 begin
-  Result := False;
+  Result := 0;
   for I := 0 to FStringGrid1.ColCount - 1 do begin
     if FStringGrid1.Cells[I, 0] <> '' then begin
-      Result := True;
-      Break;
+      Inc(Result);
     end;
   end;
+end;
+
+function TListViewFilter.TextEnteredColumn(Index: Integer): Boolean;
+begin
+  Result := FStringGrid1.Cells[Index, 0] <> '';
 end;
 
@@ -151 +235 @@
 end;
 
+procedure TListViewFilter.Reset;
+var
+  I: Integer;
+begin
+  with StringGrid do
+  for I := 0 to ColCount - 1 do
+    Cells[I, 0] := '';
+  DoOnChange;
+end;
+
 { TListViewSort }
 
+{$IFDEF WINDOWS}
+procedure TListViewSort.NewListViewWindowProc(var AMsg: TMessage);
+var
+  vColWidth: Integer;
+  vMsgNotify: TLMNotify absolute AMsg;
+  Code: Integer;
+begin
+  // call the old WindowProc of ListView
+  FOldListViewWindowProc(AMsg);
+
+  // Currently we care only with WM_NOTIFY message
+  if AMsg.Msg = WM_NOTIFY then
+  begin
+    Code := NMHDR(PHDNotify(vMsgNotify.NMHdr)^.Hdr).Code;
+    case Code of
+      HDN_ENDTRACKA, HDN_ENDTRACKW:
+        DoColumnResized(PHDNotify(vMsgNotify.NMHdr)^.Item);
+
+      HDN_BEGINTRACKA, HDN_BEGINTRACKW:
+        DoColumnBeginResize(PHDNotify(vMsgNotify.NMHdr)^.Item);
+
+      HDN_TRACKA, HDN_TRACKW:
+        begin
+          vColWidth := -1;
+          if (PHDNotify(vMsgNotify.NMHdr)^.PItem<>nil)
+             and (PHDNotify(vMsgNotify.NMHdr)^.PItem^.Mask and HDI_WIDTH <> 0)
+          then
+            vColWidth := PHDNotify(vMsgNotify.NMHdr)^.PItem^.cxy;
+
+          DoColumnResizing(PHDNotify(vMsgNotify.NMHdr)^.Item, vColWidth);
+        end;
+    end;
+  end;
+end;
+{$ENDIF}
+
+procedure TListViewSort.DoColumnBeginResize(const AColIndex: Integer);
+begin
+end;
+
+procedure TListViewSort.DoColumnResizing(const AColIndex, AWidth: Integer);
+begin
+end;
+
+procedure TListViewSort.DoColumnResized(const AColIndex: Integer);
+begin
+  if Assigned(FOnColumnWidthChanged) then
+    FOnColumnWidthChanged(Self);
+end;
 
 procedure TListViewSort.ColumnClick(Sender: TObject; Column: TListColumn);
@@ -179 +322 @@
 procedure TListViewSort.SetListView(const Value: TListView);
 begin
+  if FListView = Value then Exit;
+  if Assigned(FListView) then
+    ListView.WindowProc := FOldListViewWindowProc;
   FListView := Value;
   FListView.OnColumnClick := ColumnClick;
   FListView.OnCustomDrawItem := ListViewCustomDrawItem;
   FListView.OnClick := ListViewClick;
+  FOldListViewWindowProc := FListView.WindowProc;
+  {$IFDEF WINDOWS}
+  FListView.WindowProc := NewListViewWindowProc;
+  {$ENDIF}
+end;
+
+var
+  ListViewSortCompare: TCompareEvent;
+
+function ListViewCompare(constref Item1, Item2: TObject): Integer;
+begin
+  Result := ListViewSortCompare(Item1, Item2);
 end;
 
 procedure TListViewSort.Sort(Compare: TCompareEvent);
 begin
+  // TODO: Because TFLGObjectList compare handler is not class method,
+  // it is necessary to use simple function compare handler with local variable
+  ListViewSortCompare := Compare;
   if (List.Count > 0) then
-    List.Sort(Compare);
+    List.Sort(TComparer<TObject>.Construct(ListViewCompare));
 end;
 
@@ -194 +355 @@
 begin
   if Assigned(FOnFilter) then FOnFilter(Self)
-  else if Assigned(Source) then
-    List.Assign(Source) else
+  else if Assigned(Source) then begin
     List.Clear;
+    List.AddRange(Source);
+  end else List.Clear;
   if ListView.Items.Count <> List.Count then
     ListView.Items.Count := List.Count;
-  if Assigned(FOnCompareItem) then Sort(FOnCompareItem);
+  if Assigned(FOnCompareItem) and (Order <> soNone) then Sort(FOnCompareItem);
   //ListView.Items[-1]; // Workaround for not show first row if selected
   ListView.Refresh;
@@ -251 +413 @@
 begin
   inherited;
-  List := TListObject.Create;
+  List := TObjects.Create;
   List.OwnsObjects := False;
 end;
@@ -257 +419 @@
 destructor TListViewSort.Destroy;
 begin
-  List.Free;
+  FreeAndNil(List);
   inherited;
 end;
@@ -266 +428 @@
   TP1: TPoint;
   XBias, YBias: Integer;
-  OldColor: TColor;
+  PenColor: TColor;
+  BrushColor: TColor;
   BiasTop, BiasLeft: Integer;
   Rect1: TRect;
@@ -278 +441 @@
   Item.Left := 0;
   GetCheckBias(XBias, YBias, BiasTop, BiasLeft, ListView);
-  OldColor := ListView.Canvas.Pen.Color;
+  PenColor := ListView.Canvas.Pen.Color;
+  BrushColor := ListView.Canvas.Brush.Color;
   //TP1 := Item.GetPosition;
   lRect := Item.DisplayRect(drBounds); // Windows 7 workaround
@@ -290 +454 @@
   ItemLeft := Item.Left;
   ItemLeft := 23; // Windows 7 workaround
-  
+
   Rect1.Left := ItemLeft - CheckWidth - BiasLeft + 1 + XBias;
   //ShowMessage(IntToStr(Tp1.Y) + ', ' + IntToStr(BiasTop) + ', ' + IntToStr(XBias));
@@ -321 +485 @@
   end;
   //ListView.Canvas.Brush.Color := ListView.Color;
-  ListView.Canvas.Brush.Color := clWindow;
-  ListView.Canvas.Pen.Color := OldColor;
+  ListView.Canvas.Brush.Color := BrushColor;
+  ListView.Canvas.Pen.Color := PenColor;
 end;
 
@@ -389 +553 @@
     FHeaderHandle := ListView_GetHeader(FListView.Handle);
     for I := 0 to FListView.Columns.Count - 1 do begin
+      {$push}{$warn 5057 off}
       FillChar(Item, SizeOf(THDItem), 0);
+      {$pop}
       Item.Mask := HDI_FORMAT;
       Header_GetItem(FHeaderHandle, I, Item);