frxctrls.pas

这个是功能强大的报表软件

   if Bitmap <> nil then
   begin
     BmpWidth := Bitmap.Width;
     BrushCopy(Bounds(Rect.Left+1 , (Rect.Top + Rect.Bottom - Bitmap.Height)
       div 2, Bitmap.Width, Bitmap.Height), Bitmap, Bounds(0, 0, Bitmap.Width,
       Bitmap.Height), Bitmap.TransparentColor);
   end;
   StrPCopy(Text, Items[Index]);
   Rect.Left := Rect.Left + BmpWidth + 2;
   DrawText(Canvas.Handle, Text, StrLen(Text), Rect,
{$IFDEF Delphi4}
   DrawTextBiDiModeFlags(DT_SINGLELINE or DT_VCENTER or DT_NOPREFIX));
{$ELSE}
   DT_SINGLELINE or DT_VCENTER or DT_NOPREFIX);
{$ENDIF}
   if (Index = Numused) then
   begin
     Pen.Color := clBtnShadow;
     MoveTo(0,Rect.Bottom - 2);
     LineTo(width, Rect.Bottom - 2);
   end;
   if (Index = Numused + 1) and (Numused <> -1) then
   begin
     Pen.Color := clBtnShadow;
     MoveTo(0, Rect.Top);
     LineTo(width, Rect.Top);
   end;
 end;
end;

procedure TfrxFontComboBox.CMFontChanged(var Message: TMessage);
begin
  inherited;
  Init;
end;

procedure TfrxFontComboBox.CMFontChange(var Message: TMessage);
begin
  inherited;
  Reset;
end;

procedure TfrxFontComboBox.Init;
begin
  if GetFontHeight(Font) > FTrueTypeBMP.Height then
    ItemHeight := GetFontHeight(Font)
  else
    ItemHeight := FTrueTypeBMP.Height + 1;
  RecreateWnd;
end;

procedure TfrxFontComboBox.Click;
begin
 inherited Click;
 if not (csReading in ComponentState) then
   if not FUpdate and Assigned(FOnClick) then FOnClick(Self);
end;

procedure TfrxFontComboBox.Reset;
begin
  if csDesigning in ComponentState then exit;
  FUpdate := True;
  try
    PopulateList;
    if Items.IndexOf(Text) = -1 then
      ItemIndex := 0;
  finally
    FUpdate := False;
  end;
end;

procedure TfrxFontComboBox.CNCommand(var Message: TWMCommand);
var
  pnt:TPoint;
  ind,i:integer;
  Reg: TRegistry;
begin
  inherited;
  if (Message.NotifyCode in [CBN_CLOSEUP]) then
  begin
    frFontViewForm.Visible := False;
    ind := itemindex;
    if (ItemIndex = -1) or (ItemIndex = 0) then exit;
    if FShowMRU then
    begin
      Items.BeginUpdate;
      if Items.IndexOf(Items[ind]) <= Numused then
      begin
        Items.Move(Items.IndexOf(Items[ind]), 0);
        ItemIndex := 0;
      end else
      begin
        Items.InsertObject(0, Items[ItemIndex], Items.Objects[ItemIndex]);
        Itemindex := 0;
        if Numused < 4 then
          Inc(Numused)
        else
          Items.Delete(5);
      end;
      Items.EndUpdate;
      Reg := TRegistry.Create;
      try
        Reg.OpenKey(FRegKey,True);
        for i := 0 to 4 do
          if i <= Numused then
          begin
           Reg.WriteString('Font' + IntToStr(i), Items[i]);
           Reg.WriteInteger('FontType' + IntToStr(i), Integer(Items.Objects[i]));
         end else
         begin
           Reg.WriteString('Font' + IntToStr(i), '');
           Reg.WriteInteger('FontType' + IntToStr(i), 0);
         end;
       finally
         Reg.Free;
       end;
    end;
  end;
  if (Message.NotifyCode in [CBN_DROPDOWN]) then
  begin
    if ItemIndex < 5 then
      PostMessage(FListHandle, LB_SETCURSEL, 0, 0);
    pnt.x := Self.Left + Self.Width;
    pnt.y := Self.Top + Self.Height;
    pnt := Parent.ClientToScreen(pnt);
    frFontViewForm.Top := pnt.y;
    frFontViewForm.Left := pnt.x + 1;

    if frFontViewForm.Left+frFontViewForm.Width > Screen.Width then
    begin
      pnt.x := Self.Left;
      pnt := Parent.ClientToScreen(pnt);
      frFontViewForm.Left := pnt.x - frFontViewForm.Width - 1;
    end;
    if FUpDropdown then
    begin
      pnt.y := Self.Top;
      pnt := Parent.ClientToScreen(pnt);
      frFontViewForm.Top := pnt.y - frFontViewForm.Height;
    end;
    frFontViewForm.Visible := True;
  end;
end;


{ TfrxFontPreview }

constructor TfrxFontPreview.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  Width := 200;
  Height := 50;
  Visible := False;
  Parent := AOwner as TWinControl;

  FPanel := TPanel.Create(Self);
  with FPanel do
  begin
    Parent := Self;
    Color := clWindow;
    Ctl3D := False;
    ParentCtl3D := False;
    BorderStyle := bsSingle;
    BevelInner := bvNone;
    BevelOuter := bvNone;
    Font.Color := clWindowText;
    Font.Size := 18;
    Align := alClient;
  end;
end;

destructor TfrxFontPreview.Destroy;
begin
  FPanel.Free;
  FPanel := nil;
  inherited Destroy;
end;

procedure TfrxFontPreview.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams( Params);
    with Params do begin
      Style := WS_POPUP or WS_CLIPCHILDREN;
      ExStyle := WS_EX_TOOLWINDOW;
      WindowClass.Style := WindowClass.Style or CS_SAVEBITS;
    end;
end;


{ TfrxComboEdit }

constructor TfrxComboEdit.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  Style := csSimple;
  Height := 21;
  FPanel := TPanel.Create(Self);
  FPanel.Parent := Self;
  FPanel.SetBounds(Width - Height + 2, 2, Height - 4, Height - 4);
  FButton := TSpeedButton.Create(Self);
  FButton.Parent := FPanel;
  FButton.SetBounds(0, 0, FPanel.Width, FPanel.Height);
  FButton.OnClick := ButtonClick;
  FButtonEnabled := True;
end;

procedure TfrxComboEdit.SetPos;
begin
  SetWindowPos(EditHandle, 0, 0, 0, Width - Height - 4, ItemHeight,
    SWP_NOMOVE or SWP_NOZORDER or SWP_NOACTIVATE)
end;

procedure TfrxComboEdit.CreateWnd;
begin
  inherited CreateWnd;
  SetPos;
end;

procedure TfrxComboEdit.WMSize(var Message: TWMSize);
begin
  inherited;
  FPanel.SetBounds(Width - Height + 2, 2, Height - 4, Height - 4);
end;

procedure TfrxComboEdit.CMEnabledChanged(var Message: TMessage);
begin
  inherited;
  FButton.Enabled := Enabled;
end;

procedure TfrxComboEdit.KeyPress(var Key: Char);
begin
  if (Key = Char(vk_Return)) or (Key = Char(vk_Escape)) then
    GetParentForm(Self).Perform(CM_DIALOGKEY, Byte(Key), 0);
  inherited KeyPress(Key);
end;

function TfrxComboEdit.GetGlyph: TBitmap;
begin
  Result := FButton.Glyph;
end;

procedure TfrxComboEdit.SetGlyph(Value: TBitmap);
begin
  FButton.Glyph := Value;
end;

function TfrxComboEdit.GetButtonHint: String;
begin
  Result := FButton.Hint;
end;

procedure TfrxComboEdit.SetButtonHint(Value: String);
begin
  FButton.Hint := Value;
end;

procedure TfrxComboEdit.SetButtonEnabled(Value: Boolean);
begin
  FButtonEnabled := Value;
  FButton.Enabled := Value;
end;

procedure TfrxComboEdit.ButtonClick(Sender: TObject);
begin
  SetFocus;
  if Assigned(FOnButtonClick) then
    FOnButtonClick(Self);
end;


{ TfrxScrollWin }

constructor TfrxScrollWin.Create(AOwner: TComponent);
begin
  inherited;
  FSmallChange := 1;
  FLargeChange := 10;
{$IFDEF Delphi7}
  ControlStyle := ControlStyle + [csNeedsBorderPaint];
{$ENDIF}
end;

procedure TfrxScrollWin.CreateParams(var Params: TCreateParams);
const
  BorderStyles: array[TBorderStyle] of DWORD = (0, WS_BORDER);
begin
  inherited;
  with Params do
  begin
    Style := Style or WS_CLIPCHILDREN or WS_HSCROLL or
      WS_VSCROLL or BorderStyles[FBorderStyle];
    if Ctl3D and NewStyleControls and (FBorderStyle = bsSingle) then
    begin
      Style := Style and not WS_BORDER;
      ExStyle := ExStyle or WS_EX_CLIENTEDGE;
    end;
  end;
end;

procedure TfrxScrollWin.SetBorderStyle(const Value: TBorderStyle);
begin
  FBorderStyle := Value;
  RecreateWnd;
end;

procedure TfrxScrollWin.WMEraseBackground(var Message: TMessage);
begin
end;

procedure TfrxScrollWin.WMGetDlgCode(var Message: TWMGetDlgCode);
begin
  Message.Result := DLGC_WANTARROWS or DLGC_WANTTAB or DLGC_WANTALLKEYS;
end;

function TfrxScrollWin.GetLongPosition(DefValue: Integer; Code: Word): Integer;
var
  ScrollInfo: TScrollInfo;
begin
  ScrollInfo.cbSize := SizeOf(TScrollInfo);
  ScrollInfo.fMask := SIF_TRACKPOS;
  Result := DefValue;
  if FlatSB_GetScrollInfo(Handle, Code, ScrollInfo) then
    Result := ScrollInfo.nTrackPos;
end;

procedure TfrxScrollWin.SetHorzPage(const Value: Integer);
begin
  FHorzPage := Value;
  HorzRange := HorzRange;
end;

procedure TfrxScrollWin.SetHorzPosition(Value: Integer);
begin
  if Value > FHorzRange - FHorzPage then
    Value := FHorzRange - FHorzPage;
  if Value < 0 then
    Value := 0;
  if Value <> FHorzPosition then
  begin
    FHorzPosition := Value;
    SetPosition(Value, SB_HORZ);
    OnHScrollChange(Self);
  end;
end;

procedure TfrxScrollWin.SetHorzRange(Value: Integer);
begin
  FHorzRange := Value;
  UpdateScrollBar(Value, HorzPage, HorzPosition, SB_HORZ);
end;

procedure TfrxScrollWin.SetVertPage(const Value: Integer);
begin
  FVertPage := Value;
  VertRange := VertRange;
end;

procedure TfrxScrollWin.SetVertPosition(Value: Integer);
begin
  if Value > FVertRange - FVertPage then
    Value := FVertRange - FVertPage;
  if Value < 0 then
    Value := 0;
  if Value <> FVertPosition then
  begin
    FVertPosition := Value;
    SetPosition(Value, SB_VERT);
    OnVScrollChange(Self);
  end;
end;

procedure TfrxScrollWin.SetVertRange(Value: Integer);
begin
  FVertRange := Value;
  UpdateScrollBar(Value, VertPage, VertPosition, SB_VERT);
end;

procedure TfrxScrollWin.SetPosition(Value: Integer; Code: Word);
begin
  FlatSB_SetScrollPos(Handle, Code, Value, True);
end;

procedure TfrxScrollWin.UpdateScrollBar(Max, Page, Pos: Integer; Code: Word);
var
  ScrollInfo: TScrollInfo;
begin
  ScrollInfo.cbSize := SizeOf(ScrollInfo);
  ScrollInfo.fMask := SIF_ALL;
  ScrollInfo.nMin := 0;
  if Max < Page then
    Max := 0;
  ScrollInfo.nMax := Max;
  ScrollInfo.nPage := Page;
  ScrollInfo.nPos := Pos;
  ScrollInfo.nTrackPos := Pos;
  FlatSB_SetScrollInfo(Handle, Code, ScrollInfo, True);
end;

procedure TfrxScrollWin.Paint;
begin
  with Canvas do
  begin
    Brush.Color := Color;
    FillRect(Rect(0, 0, ClientWidth, ClientHeight));
  end;
end;

procedure TfrxScrollWin.WMHScroll(var Message: TWMHScroll);
begin
  case Message.ScrollCode of
    SB_LINEUP: HorzPosition := HorzPosition - FSmallChange;
    SB_LINEDOWN: HorzPosition := HorzPosition + FSmallChange;
    SB_PAGEUP: HorzPosition := HorzPosition - FLargeChange;
    SB_PAGEDOWN: HorzPosition := HorzPosition + FLargeChange;
    SB_THUMBPOSITION, SB_THUMBTRACK:
      HorzPosition := GetLongPosition(Message.Pos, SB_HORZ);
    SB_TOP: HorzPosition := 0;
    SB_BOTTOM: HorzPosition := HorzRange;
  end;
end;

procedure TfrxScrollWin.WMVScroll(var Message: TWMVScroll);
begin
  case Message.ScrollCode of
    SB_LINEUP: VertPosition := VertPosition - FSmallChange;
    SB_LINEDOWN: VertPosition := VertPosition + FSmallChange;
    SB_PAGEUP: VertPosition := VertPosition - FLargeChange;
    SB_PAGEDOWN: VertPosition := VertPosition + FLargeChange;
    SB_THUMBPOSITION, SB_THUMBTRACK:
      VertPosition := GetLongPosition(Message.Pos, SB_VERT);
    SB_TOP: VertPosition := 0;
    SB_BOTTOM: VertPosition := VertRange;
  end;
end;

procedure TfrxScrollWin.OnHScrollChange(Sender: TObject);
begin
end;

procedure TfrxScrollWin.OnVScrollChange(Sender: TObject);
begin
end;


end.


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