skinmenus.pas

P2P即时通讯源码(DELPHI编写)

      then
        DSMI := TspDataSkinMenuItem(SD.ObjectList.Items[i])
      else
        DSMI := nil;
      Canvas.Font.Assign(Self.ParentMenu.FDefaultMenuItemFont);
    end;

  Menu := Item.GetParentMenu;
  ImgL := Menu.Images;
  j := Item.Count;
  for i := StartIndex to  j - 1 do
   if TMenuItem(Item.Items[i]).Visible
   then
     begin
       if TMenuItem(Item.Items[i]).Action <> nil
       then
         TMenuItem(Item.Items[i]).Action.Update;
       ItemList.Add(TspSkinMenuItem.Create(Self, TMenuItem(Item.Items[i]), DSMI));
     end;
  //

  CalcSizes;

  if PW <> nil
  then
    begin
      sw := WindowPicture.Width;
      sh := WindowPicture.Height;
      NewLTPoint := PW.LTPoint;
      NewRTPoint := Point(Width - (sw - PW.RTPoint.X), PW.RTPoint.Y);
      NewLBPoint := Point(PW.LBPoint.X, Height - (sh - PW.LBPoint.Y));
      NewRBPoint := Point(Width - (sw - PW.RBPoint.X),
                          Height - (sh - PW.RBPoint.Y));

      NewItemsRect := Rect(PW.ItemsRect.Left, PW.ItemsRect.Top,
                           Width - (sw - PW.ItemsRect.Right),
                           Height - (sh - PW.ItemsRect.Bottom));

    end
  else
    NewItemsRect := Rect(3, 3, Width - 3, Height - 3);
  CalcItemRects;
  if MaskPicture <> nil then SetMenuWindowRegion;
end;

procedure TspSkinPopupWindow.CreateMenu2;
var
  sw, sh: Integer;
  i, j: Integer;
  Menu: TMenu;

  function CalcItemTextWidth(Item: TMenuItem): Integer;
  var
    R: TRect;
    MICaption: String;
  begin
   if Item.ShortCut <> 0
   then
     MICaption := Item.Caption + '  ' + ShortCutToText(Item.ShortCut)
   else
     MICaption := Item.Caption;
    R := Rect(0, 0, 0, 0);
    DrawText(Canvas.Handle, PChar(MICaption), Length(MICaption), R,
             DT_CALCRECT);
    Result := R.Right + 2;
  end;

  function GetMenuWindowHeight: Integer;
  var
    i, j, ih: integer;
  begin
    j := 0;
    for i := VisibleStartIndex to VisibleCount - 1 do
    with TspSkinMenuItem(ItemList.Items[i]) do
     begin
      if PW <> nil
      then
        begin
          if MenuItem.Caption = '-'
          then ih := RectHeight(DSMI.DividerRect)
          else ih := RectHeight(DSMI.SkinRect);
        end
      else
        begin
          if MenuItem.Caption = '-'
          then ih := 4
          else ih := ParentMenu.DefaultMenuItemHeight;
        end;
      inc(j, ih);
    end;
    if PW <> nil
    then
      Result := j + PW.ItemsRect.Top + (WindowPicture.Height - PW.ItemsRect.Bottom)
    else
      Result := j + 6;
  end;

  function GetMenuWindowWidth: Integer;
  var
    i, iw: Integer;
  begin
    iw := 0;
    for i := 0 to ItemList.Count - 1 do
    begin
      j := CalcItemTextWidth(TspSkinMenuItem(ItemList.Items[i]).MenuItem);
      if j > iw then iw := j;
    end;
    inc(iw, 16);
    if ImgL <> nil
    then
      GlyphWidth := ImgL.Width + 5
    else
      GlyphWidth := 16;
    Inc(iw, GlyphWidth);
    if (PW <> nil)
    then
      begin
        Inc(iw, DSMI.TextRct.Left);
        Inc(iw, RectWidth(DSMI.SkinRect) - DSMI.TextRct.Right);
        Result := iw + PW.ItemsRect.Left + (WindowPicture.Width - PW.ItemsRect.Right);
      end
    else
      Result := iw + 10;
  end;


procedure CalcSizes;
var
  W, H: Integer;
begin
  //
  VisibleStartIndex := 0;
  VisibleCount := ItemList.Count;
  W := GetMenuWindowWidth;
  H := GetMenuWindowHeight;
  Scroll := False;
  //
  if H > RectHeight(ParentMenu.WorkArea)
  then
    begin
      H := RectHeight(ParentMenu.WorkArea);
      Scroll := True;
    end;  
  //
  Width := W;
  Height := H;
end;

var
  TmpStartIndex: Integer;
begin
  if SD <> nil
  then
    begin
      i := SD.GetIndex('MENUITEM');
      if i = -1 then i := SD.GetIndex('menuitem');
    end
  else
    i := -1;

  if (PW <> nil) and (i <> - 1) and ParentMenu.UseSkinFont
  then
    begin
      // init menu
      DSMI := TspDataSkinMenuItem(SD.ObjectList.Items[i]);
      with Canvas.Font do
      begin
        Height := DSMI.FontHeight;
        Style := DSMI.FontStyle;
        Name := DSMI.FontName;
        CharSet := ParentMenu.FDefaultMenuItemFont.Charset;
      end;
    end
  else
    begin
      if (i <> -1)
      then
        DSMI := TspDataSkinMenuItem(SD.ObjectList.Items[i])
      else
        DSMI := nil;
      Canvas.Font.Assign(Self.ParentMenu.FDefaultMenuItemFont);
    end;

  Menu := Item.GetParentMenu;
  ImgL := Menu.Images;
  j := Item.Count;
  if StartIndex < j then
  for i := StartIndex to  j - 1 do
   if TMenuItem(Item.Items[i]).Visible
   then
     begin
       if TMenuItem(Item.Items[i]).Action <> nil
       then
         TMenuItem(Item.Items[i]).Action.Update;
       ItemList.Add(TspSkinMenuItem.Create(Self, TMenuItem(Item.Items[i]), DSMI));
     end;

  TmpStartIndex := StartIndex - Item.Count;
  if TmpStartIndex < 0 then TmpStartIndex := 0;
  j := Item2.Count;
  if TmpStartIndex < j then
  for i := TmpStartIndex to  j - 1 do
   if TMenuItem(Item2.Items[i]).Visible
   then
     begin
       if TMenuItem(Item2.Items[i]).Action <> nil
       then
         TMenuItem(Item2.Items[i]).Action.Update;
       ItemList.Add(TspSkinMenuItem.Create(Self, TMenuItem(Item2.Items[i]), DSMI));
     end;
  //

  CalcSizes;

  if PW <> nil
  then
    begin
      sw := WindowPicture.Width;
      sh := WindowPicture.Height;
      NewLTPoint := PW.LTPoint;
      NewRTPoint := Point(Width - (sw - PW.RTPoint.X), PW.RTPoint.Y);
      NewLBPoint := Point(PW.LBPoint.X, Height - (sh - PW.LBPoint.Y));
      NewRBPoint := Point(Width - (sw - PW.RBPoint.X),
                          Height - (sh - PW.RBPoint.Y));

      NewItemsRect := Rect(PW.ItemsRect.Left, PW.ItemsRect.Top,
                           Width - (sw - PW.ItemsRect.Right),
                           Height - (sh - PW.ItemsRect.Bottom));

    end
  else
    NewItemsRect := Rect(3, 3, Width - 3, Height - 3);
  CalcItemRects;
  if MaskPicture <> nil then SetMenuWindowRegion;
end;

function TspSkinPopupWindow.GetEndStartVisibleIndex: Integer;
var
  i, j, k, ih, H: Integer;
begin
  j := NewItemsRect.Bottom - MarkerItemHeight;
  H := MarkerItemHeight;
  k := 0;
  for i := ItemList.Count - 1 downto 0 do
  begin
    with TspSkinMenuItem(ItemList.Items[i]) do
     begin
       if DSMI <> nil
       then
         begin
           if MenuItem.Caption = '-'
           then ih := RectHeight(DSMI.DividerRect)
           else ih := RectHeight(DSMI.SkinRect);
         end
       else
         begin
           if MenuItem.Caption = '-'
           then ih := 4
           else ih := ParentMenu.DefaultMenuItemHeight;
         end;
       j := j - ih;
       if j >= H
       then
         inc(k)
       else
         Break;
     end;
  end;
  Result := ItemList.Count - k;
end;

procedure TspSkinPopupWindow.CalcItemRects;
var
  i, j, ih, H: Integer;
begin
  j := NewItemsRect.Top;
  H := NewItemsRect.Bottom;
  if Scroll
  then
    begin
      H := H - MarkerItemHeight;
      j := j + MarkerItemHeight;
    end;
  VisibleCount := 0;
  for i := VisibleStartIndex to ItemList.Count - 1 do
    with TspSkinMenuItem(ItemList.Items[i]) do
     begin
      if DSMI <> nil
      then
        begin
          if MenuItem.Caption = '-'
          then ih := RectHeight(DSMI.DividerRect)
          else ih := RectHeight(DSMI.SkinRect)
        end
      else
        begin
          if MenuItem.Caption = '-'
          then ih := 4
          else ih := ParentMenu.DefaultMenuItemHeight;
        end;
      ObjectRect.Left := NewItemsRect.Left;
      ObjectRect.Right := NewItemsRect.Right;
      ObjectRect.Top := j;
      ObjectRect.Bottom :=  j + ih;
      if ObjectRect.Bottom <= H
      then
        begin
          FVisible := True;
          Inc(VisibleCount)
        end
      else
        Break;
      inc(j, ih);
    end;

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

end;

procedure TspSkinPopupWindow.CMMouseEnter;
begin
  inherited;
end;

procedure TspSkinPopupWindow.CMMouseLeave;
begin
  inherited;
end;

procedure TspSkinPopupWindow.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;
  end;
end;

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

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

procedure TspSkinPopupWindow.Show;

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

  function GetY: Integer;
  var
    Offset: Integer;
  begin
    if Scroll
    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 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;