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📄 bsskinmenus.pas

📁 一套非常好用的delphi控件,方便程序员工作
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          Inc(VisibleCount)
        end
      else
        Break;
      inc(j, ih);
    end;

  if Scroll
  then
    begin
      if VisibleStartIndex > 0
      then
        for i := 0 to VisibleStartIndex - 1 do
          TbsSkinMenuItem(ItemList.Items[i]).FVisible := False;
      if VisibleCount + VisibleStartIndex <= ItemList.Count - 1
      then
        for i := VisibleCount + VisibleStartIndex to ItemList.Count - 1 do
          TbsSkinMenuItem(ItemList.Items[i]).FVisible := False;
    end;

end;

procedure TbsSkinPopupWindow.CMMouseEnter;
begin
  inherited;
end;

procedure TbsSkinPopupWindow.CMMouseLeave;
begin
  inherited;
end;

procedure TbsSkinPopupWindow.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  with Params do
  begin
    Style := WS_POPUP;
    ExStyle := WS_EX_TOOLWINDOW;
    WindowClass.Style := WindowClass.Style or CS_SAVEBITS;
    if CheckWXP then
      WindowClass.Style := WindowClass.style or CS_DROPSHADOW_ ;
  end;
end;

procedure TbsSkinPopupWindow.WMMouseActivate(var Message: TMessage);
begin
  Message.Result := MA_NOACTIVATE;
end;

procedure TbsSkinPopupWindow.Hide;
begin
  SetWindowPos(Handle, 0, 0, 0, 0, 0, SWP_NOZORDER or
    SWP_NOMOVE or SWP_NOSIZE or SWP_NOACTIVATE or SWP_HIDEWINDOW);
  MorphTimer.Enabled := False;
  MouseTimer.Enabled := False;
  Visible := False;
end;

procedure TbsSkinPopupWindow.Show;

procedure CalcMenuPos(var X, Y: Integer; R: TRect);
var
  WA: TRect;
  ChangeY: Boolean;

  function GetY: Integer;
  var
    Offset: Integer;
  begin
    if Scroll and not Scroll2
    then
      Result := WA.Top
    else
      begin
        if PopupByItem
        then
          begin
            Offset := R.Top + Height - NewItemsRect.Top - WA.Bottom;
            if Offset > 0
            then
              begin
                if R.Top < WA.Top + RectHeight(WA) div 2
                then
                  Result := WA.Bottom - Height
                else
                  begin
                    Result := R.Bottom - Height + NewItemsRect.Top;
                    if Result  < WA.Top then Result := WA.Top;
                  end
              end
            else
              Result := R.Top - NewItemsRect.Top;
          end
        else
          begin
            if PopupUp
            then
              begin
                if R.Top - Height < WA.Top
                then
                  begin
                    if R.Top < WA.Top + RectHeight(WA) div 2
                    then
                      begin
                        Result := R.Bottom;
                        Offset := Result + Height - WA.Bottom;
                        if Offset > 0
                        then
                          begin
                            Result  := Result - Offset;
                            ChangeY := True;
                          end;
                       end
                     else
                       begin
                         Result := WA.Top;
                         ChangeY := True;
                       end;
                  end
                else
                  Result  := R.Top - Height;
              end
            else
              begin
                Offset := R.Bottom + Height - WA.Bottom;
                if Offset > 0
                then
                  begin
                    if R.Top < WA.Top + RectHeight(WA) div 2
                    then
                      begin
                        Result := R.Bottom - Offset;
                        ChangeY := True
                      end
                    else
                      begin
                        if R.Top - Height < WA.Top
                        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 and not Scroll2) 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;
    
  CreateMenu(AItem, 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.Show2;

procedure CalcMenuPos(var X, Y: Integer; R: TRect);
var
  WA: TRect;
  ChangeY: Boolean;

  function GetY: Integer;
  var
    Offset: Integer;
  begin
    if Scroll and not Scroll2
    then
      Result := WA.Top
    else
      begin
        if PopupByItem
        then
          begin
            Offset := R.Top + Height - NewItemsRect.Top - WA.Bottom;
            if Offset > 0
            then
              begin
                if R.Top < WA.Top + RectHeight(WA) div 2
                then
                  Result := WA.Bottom - Height
                else
                  begin
                    Result := R.Bottom - Height + NewItemsRect.Top;
                    if Result  < WA.Top then Result := WA.Top;
                  end
              end
            else
              Result := R.Top - NewItemsRect.Top;
          end
        else
          begin
            if PopupUp
            then
              begin
                if R.Top - Height < WA.Top
                then
                  begin
                    if R.Top < WA.Top + RectHeight(WA) div 2
                    then
                      begin
                        Result := R.Bottom;
                        Offset := Result + Height - WA.Bottom;
                        if Offset > 0
                        then
                          begin
                            Result  := Result - Offset;
                            ChangeY := True;
                          end;
                       end
                     else
                       begin
                         Result := WA.Top;
                         ChangeY := True;
                       end;
                  end
                else
                  Result  := R.Top - Height;
              end
            else
              begin
                Offset := R.Bottom + Height - WA.Bottom;
                if Offset > 0
                then
                  begin
                    if R.Top < WA.Top + RectHeight(WA) div 2
                    then
                      begin
                        Result := R.Bottom - Offset;
                        ChangeY := True
                      end
                    else
                      begin
                        if R.Top - Height < WA.Top
                        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 and not Scroll2) 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;

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