bsskinmenus.pas

Delphi开发的图象处理软件

                        then
                          begin
                            Result := WA.Top;
                            ChangeY := True;
                          end
                        else
                          Result := R.Top - Height;
                      end
                  end
                else
                  Result := R.Bottom;
              end;
          end;
      end;
  end;

  function GetX: Integer;
  begin
    if PopupByItem or Scroll or ChangeY
    then
      begin
        if R.Right + Width + 1 > WA.Right
        then Result := R.Left - Width - 1 else Result := R.Right + 1;
      end
    else
      begin
        if R.Left + Width > WA.Right
        then Result := WA.Right - Width else
        if R.Left < WA.Left then Result := WA.Left else Result := R.Left;
      end;
  end;

begin
  WA := ParentMenu.WorkArea;
  ChangeY := False;
  Y := GetY;
  X := GetX;
end;

const
  WS_EX_LAYERED = $80000;
  AnimationStep = 3;
var
  i: Integer;
  ABV: Integer;
begin
  if CheckW2KWXP and ParentMenu.AlphaBlend and ParentMenu.AlphaBlendAnimation and
     ParentMenu.First
  then
    Application.ProcessMessages;
    
  CreateMenu2(AItem, AItem2, StartIndex);
  CalcMenuPos(ShowX, ShowY, R);
  //
  if CheckW2KWXP and ParentMenu.AlphaBlend
  then
    begin
      SetWindowLong(Handle, GWL_EXSTYLE,
                    GetWindowLong(Handle, GWL_EXSTYLE) or WS_EX_LAYERED);
      if ParentMenu.First and ParentMenu.AlphaBlendAnimation
      then SetAlphaBlendTransparent(Handle, 0)
      else SetAlphaBlendTransparent(Handle, ParentMenu.AlphaBlendValue);
    end;
  //
  SetWindowPos(Handle, HWND_TOPMOST, ShowX, ShowY, 0, 0,
               SWP_NOACTIVATE or SWP_SHOWWINDOW or SWP_NOSIZE);
  Visible := True;
  if CheckW2KWXP and ParentMenu.AlphaBlend and ParentMenu.AlphaBlendAnimation and
     ParentMenu.First
  then
    begin
      i := 0;
      ABV := ParentMenu.AlphaBlendValue;
      repeat
        Inc(i, AnimationStep);
        if i > ABV then i := ABV;
        SetAlphaBlendTransparent(Handle, i);
      until i >= ABV;
    end;
  //
  MouseTimer.Enabled := True;
  ActiveItem := -1;
  if ItemList.Count > 0
  then
    for i := 0 to ItemList.Count - 1 do
     with TbsSkinMenuItem(ItemList.Items[i]) do
     begin
       if MenuItem.Enabled and (MenuItem.Caption <> '-')
       then
         begin
           WaitCommand := True;
           ActiveItem := i;
           MouseEnter(True);
           Break;
         end;
     end;
end;

procedure TbsSkinPopupWindow.PaintMenu;
var
  C: TCanvas;
  i: Integer;
  B: TBitMap;
begin
  C := TCanvas.Create;
  C.Handle := DC;
  B := TBitMap.Create;
  CreateRealImage(B);
  // Draw items
  for i := VisibleStartIndex to VisibleStartIndex + VisibleCount - 1 do
    TbsSkinMenuItem(ItemList.Items[i]).Draw(B.Canvas);
  // markers
  if Scroll
  then
    begin
      DrawUpMarker(B.Canvas);
      DrawDownMarker(B.Canvas);
    end;
  C.Draw(0, 0, B);
  B.Free;
  C.Free;
end;

procedure TbsSkinPopupWindow.WMEraseBkgrnd;
begin
  PaintMenu(Message.WParam);
end;

procedure TbsSkinPopupWindow.MouseUp;
begin
  TestActive(X, Y);
  if (ActiveItem <> -1) and (Button = mbleft) and GetActive(X, Y)
  then
    with TbsSkinMenuItem(ItemList.Items[ActiveItem]) do
     if MenuItem.Caption <> '-' then MouseDown(X, Y);
end;

procedure TbsSkinPopupWindow.TestMouse;
var
  P, P1: TPoint;
begin
  GetCursorPos(P1);
  P := ScreenToClient(P1);
  if (OMX <> P.X) or (OMY <> P.Y)
  then 
    if InWindow(P1)
    then
      TestActive(P.X, P.Y)
    else
      if Scroll
      then
        begin
          ScrollCode := 0;
          DrawUpMarker(Canvas);
          DrawDownMarker(Canvas);
        end;
  OMX := P.X;
  OMY := P.Y;
end;

function TbsSkinPopupWindow.GetActive;
var
  i: Integer;
begin
  i := -1;
  if ItemList.Count = 0
  then
    Result := False
  else
  repeat
    Inc(i);
    with TbsSkinMenuItem(ItemList.Items[i]) do
      Result := FVisible and PtInRect(ObjectRect, Point(X, Y));
  until Result or (i = ItemList.Count - 1);
end;

procedure TbsSkinPopupWindow.TestActive;
var
  i: Integer;
  B: Boolean;
  R1, R2: TRect;
begin
  if Scroll
  then
    begin
      R1 := Rect(NewItemsRect.Left, NewItemsRect.Top,
            NewItemsRect.Right, NewItemsRect.Top + MarkerItemHeight);
      R2 := Rect(NewItemsRect.Left, NewItemsRect.Bottom - MarkerItemHeight,
            NewItemsRect.Right, NewItemsRect.Bottom);

      if PtInRect(R1, Point(X, Y)) and (ScrollCode = 0) and CanScroll(1)
      then
        begin
          ScrollCode := 1;
          DrawUpMarker(Canvas);
          StartScroll;
        end
      else
      if PtInRect(R2, Point(X, Y)) and (ScrollCode = 0)  and CanScroll(2)
      then
        begin
          ScrollCode := 2;
          DrawDownMarker(Canvas);
          StartScroll;
        end
      else
        if (ScrollCode <> 0) and not PtInRect(R1, Point(X, Y)) and
                                 not PtInRect(R2, Point(X, Y))
        then
          StopScroll;
     end;

  if (ItemList.Count = 0) then Exit;

  OldActiveItem := ActiveItem;

  i := -1;
  repeat
    Inc(i);
    with TbsSkinMenuItem(ItemList.Items[i]) do
    begin
      B := FVisible and PtInRect(ObjectRect, Point(X, Y));
    end;
  until B or (i = ItemList.Count - 1);

  if B then ActiveItem := i;

  if OldActiveItem >= ItemList.Count then OldActiveItem := -1;
  if ActiveItem >= ItemList.Count then ActiveItem := -1;
  if (OldActiveItem = ActiveItem) and (ActiveItem <> -1)
  then
    begin
      with TbsSkinMenuItem(ItemList.Items[ActiveItem]) do
       if WaitCommand
       then
         begin
           WaitCommand := False;
           if MenuItem.Count <> 0
           then
             MouseEnter(False);
         end;
    end
  else
  if (OldActiveItem <> ActiveItem)
  then
    begin
      if OldActiveItem <> - 1
      then
        with TbsSkinMenuItem(ItemList.Items[OldActiveItem]) do
        begin
          if MenuItem.Enabled and (MenuItem.Caption <> '-')
          then
            MouseLeave;
        end;

      if ActiveItem <> - 1
      then
        with TbsSkinMenuItem(ItemList.Items[ActiveItem]) do
        begin
          if MenuItem.Enabled and (MenuItem.Caption <> '-')
          then
            MouseEnter(False);
        end;
    end;

end;

function TbsSkinPopupWindow.InWindow;
var
  H: HWND;
begin
  H := WindowFromPoint(P);
  Result := H = Handle;
end;

//====================TbsSkinMenu===================//
constructor TbsSkinMenu.CreateEx;
begin
  inherited Create(AOwner);
  FUseSkinFont := True;
  AlphaBlendAnimation := False;
  AlphaBlend := False;
  AlphaBlendValue := 150;
  FPopupList := TList.Create;
  WaitTimer := TTimer.Create(Self);
  WaitTimer.Enabled := False;
  WaitTimer.OnTimer := WaitItem;
  WaitTimer.Interval := WaitTimerInterval;
  WItem := nil;
  FVisible := False;
  FForm := AForm;
  PopupCtrl := nil;
  DCtrl := nil;
  FDefaultMenuItemHeight := 20;
  FDefaultMenuItemFont := TFont.Create;
  with FDefaultMenuItemFont do
  begin
    Name := 'Arial';
    Style := [];
    Height := 14;
  end;
end;

destructor TbsSkinMenu.Destroy;
begin
  CloseMenu(0);
  FPopupList.Free;
  WaitTimer.Free;
  FDefaultMenuItemFont.Free;
  inherited Destroy;
end;

procedure TbsSkinMenu.SetDefaultMenuItemFont(Value: TFont);
begin
  FDefaultMenuItemFont.Assign(Value);
end;

function TbsSkinMenu.GetWorkArea;
begin
  Result := GetMonitorWorkArea(FForm.Handle, True);
end;

procedure TbsSkinMenu.WaitItem(Sender: TObject);
begin
  if WItem <> nil then CheckItem(WItem.Parent, WItem, True, False);
  WaitTimer.Enabled := False;
end;

function TbsSkinMenu.GetPWIndex;
var
  i: Integer;
begin
  for i := 0 to FPopupList.Count - 1 do
    if PW = TbsSkinPopupWindow(FPopupList.Items[i]) then Break;
  Result := i;
end;

procedure TbsSkinMenu.CheckItem;
var
  Menu: TMenu;
  MenuI: TMenuItem;
  i: Integer;
  R: TRect;
begin
  if (MI.MenuItem.Count = 0) and not Down
  then
    begin
      WaitTimer.Enabled := False;
      WItem := nil;
      i := GetPWIndex(PW);
      if i < FPopupList.Count - 1 then CloseMenu(i + 1);
    end
  else
  if (MI.MenuItem.Count = 0) and Down
  then
    begin
      WaitTimer.Enabled := False;
      WItem := nil;
      MenuI := MI.MenuItem;
      Hide;
      //
      Menu := MenuI.GetParentMenu;
      Menu.DispatchCommand(MenuI.Command);
      //
      if DCtrl <> nil
      then
        if DCtrl is TWinControl
        then
          SendMessage(TWinControl(DCtrl).Handle, WM_AFTERDISPATCH, 0, 0)
        else
          DCtrl.Perform(WM_AFTERDISPATCH, 0, 0);
      DCtrl := nil;
      //
    end
  else
  if (MI.MenuItem.Count <> 0) and not Down and not Kb
  then
    begin
      WaitTimer.Enabled := False;
      WItem := nil;
      i := GetPWIndex(PW);
      if i < FPopupList.Count - 1 then CloseMenu(i + 1);
      WItem := MI;
      WaitTimer.Enabled := True;
    end
  else
  if (MI.MenuItem.Count <> 0) and Down
  then
    begin
      //
      MenuI := MI.MenuItem;
      Menu := MenuI.GetParentMenu;
      Menu.DispatchCommand(MenuI.Command);
      //
      WaitTimer.Enabled := False;
      WItem := nil;
      MI.Down := True;
      R.Left := PW.Left + MI.ObjectRect.Left;
      R.Top := PW.Top + MI.ObjectRect.Top;
      R.Right := PW.Left + MI.ObjectRect.Right;
      R.Bottom := PW.Top + MI.ObjectRect.Bottom;
      PopupSub(R, MI.MenuItem, 0, True, False);
    end
end;

procedure TbsSkinMenu.Popup;
var
  BSF: TbsBusinessSkinForm;
begin
  FFirst := not FVisible;
  PopupCtrl := APopupCtrl;
  if FPopupList.Count <> 0 then CloseMenu(0);
  WorkArea := GetWorkArea;
  SkinData := ASkinData;
  if (AItem.Count = 0) or (StartIndex >= AItem.Count) then Exit;
  FVisible := True;
  PopupSub(R, AItem, StartIndex, False, PopupUp);
  FFirst := False;
end;

procedure TbsSkinMenu.Popup2;
var
  BSF: TbsBusinessSkinForm;
begin
  FFirst := not FVisible;
  PopupCtrl := APopupCtrl;
  if FPopupList.Count <> 0 then CloseMenu(0);
  WorkArea := GetWorkArea;
  SkinData := ASkinData;
  if (AItem.Count = 0) or (StartIndex >= AItem.Count + AItem2.Count) then Exit;
  FVisible := True;
  PopupSub2(R, AItem, AItem2, StartIndex, False, PopupUp);
  FFirst := False;
end;

procedure TbsSkinMenu.PopupSub2;
var
  P: TbsSkinPopupWindow;
begin
  if (SkinData = nil) or (SkinData.Empty)
  then
    P := TbsSkinPopupWindow.CreateEx(Self, Self, nil)
  else
    P := TbsSkinPopupWindow.CreateEx(Self, Self, SkinData.PopupWindow);
  FPopupList.Add(P);
  with P do Show2(R, AItem, AItem2, StartIndex, PopupByItem, PopupUp);
end;

procedure TbsSkinMenu.PopupSub;
var
  P: TbsSkinPopupWindow;
begin
  if (SkinData = nil) or (SkinData.Empty)
  then
    P := TbsSkinPopupWindow.CreateEx(Self, Self, nil)
  else
    P := TbsSkinPopupWindow.CreateEx(Self, Self, SkinData.PopupWindow);
  FPopupList.Add(P);
  with P do Show(R, AItem, StartIndex, PopupByItem, PopupUp);
end;

procedure TbsSkinMenu.CloseMenu;
var
  i: Integer;
begin
  for i := FPopupList.Count - 1 downto EndIndex do
  begin
    TbsSkinPopupWindow(FPopupList.Items[i]).Free;
    FPopupList.Delete(i);
  end;
  if EndIndex = 0
  then
    begin
      FVisible := False;
      WaitTimer.Enabled := False;
      DCtrl := PopupCtrl;
      if PopupCtrl <> nil
      then
        begin
          if PopupCtrl is TWinControl
          then
            SendMessage(TWinControl(PopupCtrl).Handle, WM_CLOSESKINMENU, 0, 0)
          else
            PopupCtrl.Perform(WM_CLOSESKINMENU, 0, 0);
          PopupCtrl := nil;
        end;
    end;
end;

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