suidbctrls.pas

SUIPack是一款为Delphi和C++Builder开发的所见即所得的界面增强VCL组件

        SetUIStyle(SUI_THEME_DEFAULT);          
    end;
end;

procedure TsuiDBListBox.SetBorderColor(const Value: TColor);
begin
    m_BorderColor := Value;
    Repaint();
end;

procedure TsuiDBListBox.WMEARSEBKGND(var Msg: TMessage);
begin
    inherited;

    DrawControlBorder(self, m_BorderColor, Color);
end;

procedure TsuiDBListBox.WMPAINT(var Msg: TMessage);
begin
    inherited;

    DrawControlBorder(self, m_BorderColor, COlor);
end;

procedure TsuiDBListBox.CMEnabledChanged(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.LBADDSTRING(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.LBDELETESTRING(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.LBINSERTSTRING(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.LBNSELCHANGE(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.LBNSETFOCUS(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.LBSETCOUNT(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.OnVScrollBarChange(Sender: TObject);
begin
    if m_SelfChanging then
        Exit;
    SendMessage(Handle, WM_VSCROLL, MakeWParam(SB_THUMBPOSITION, m_VScrollBar.Position), 0);
    Invalidate;
end;

procedure TsuiDBListBox.SetVScrollBar(const Value: TsuiScrollBar);
begin
    if m_VScrollBar = Value then
        Exit;
    if m_VScrollBar <> nil then
    begin
        m_VScrollBar.OnChange := nil;
        m_VScrollBar.LineButton := 0;
        m_VScrollBar.Max := 100;
        m_VScrollBar.Enabled := true;
    end;

    m_VScrollBar := Value;
    if m_VScrollBar = nil then
        Exit;
    m_VScrollBar.Orientation := suiVertical;
    m_VScrollBar.OnChange := OnVScrollBArChange;
    m_VScrollBar.BringToFront();

    UpdateScrollBarsPos();
end;

procedure TsuiDBListBox.UpdateScrollBars;
var
    info : tagScrollInfo;
    barinfo : tagScrollBarInfo;
    R : Boolean;
begin
    m_SelfChanging := true;
    if m_VScrollBar <> nil then
    begin
        barinfo.cbSize := SizeOf(barinfo);
        R := SUIGetScrollBarInfo(Handle, Integer(OBJID_VSCROLL), barinfo);
        if (barinfo.rgstate[0] = STATE_SYSTEM_INVISIBLE) or
           (barinfo.rgstate[0] = STATE_SYSTEM_UNAVAILABLE) or
           (not R) then
        begin
            m_VScrollBar.LineButton := 0;
            m_VScrollBar.Enabled := false;
            m_VScrollBar.Visible := false;
        end
        else if not Enabled then
            m_VScrollBar.Enabled := false
        else
        begin
            m_VScrollBar.LineButton := abs(barinfo.xyThumbBottom - barinfo.xyThumbTop);
            m_VScrollBar.Enabled := true;
            m_VScrollBar.Visible := true;
        end;
        info.cbSize := SizeOf(info);
        info.fMask := SIF_ALL;
        GetScrollInfo(Handle, SB_VERT, info);
        m_VScrollBar.Max := info.nMax - Integer(info.nPage) + 1;
        m_VScrollBar.Min := info.nMin;
        m_VScrollBar.Position := info.nPos;
    end;
    m_SelfChanging := false;
end;

procedure TsuiDBListBox.UpdateScrollBarsPos;
var
    L2R : Boolean;
begin
    if m_VScrollBar <> nil then
    begin
        L2R := ((BidiMode = bdLeftToRight) or (BidiMode = bdRightToLeftReadingOnly)) or (not SysLocale.MiddleEast);
        if L2R then
            m_VScrollBar.Left := Left + Width - m_VScrollBar.Width - 2
        else
            m_VScrollBar.Left := Left + 2;
        m_VScrollBar.Top := Top + 1;
        m_VScrollBar.Height := Height - 2;
    end;

    UpdateScrollBars();
end;

procedure TsuiDBListBox.WMDELETEITEM(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.WMKeyDown(var Message: TWMKeyDown);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.WMMOUSEWHEEL(var Message: TMessage);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.WMMOVE(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBarsPos();
end;

procedure TsuiDBListBox.WMSIZE(var Msg: TMessage);
begin
    inherited;
    UpdateScrollBarsPos();
end;

procedure TsuiDBListBox.WMHSCROLL(var Message: TWMHScroll);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.WMMOUSEMOVE(var Message: TMessage);
begin
    inherited;
    if m_MouseDown then UpdateScrollBars();
end;

procedure TsuiDBListBox.WMVSCROLL(var Message: TWMVScroll);
begin
    inherited;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.WMLButtonUp(var Message: TMessage);
begin
    inherited;
    m_MouseDown := false;
end;

procedure TsuiDBListBox.SetFileTheme(const Value: TsuiFileTheme);
begin
    m_FileTheme := Value;
    if m_VScrollBar <> nil then
        m_VScrollBar.FileTheme := Value;
    SetUIStyle(m_UIStyle);
end;

procedure TsuiDBListBox.SetUIStyle(const Value: TsuiUIStyle);
var
    OutUIStyle : TsuiUIStyle;
begin
    m_UIStyle := Value;

    if UsingFileTheme(m_FileTheme, m_UIStyle, OutUIStyle) then
        m_BorderColor := m_FileTheme.GetColor(SKIN2_CONTROLBORDERCOLOR)
    else
        m_BorderColor := GetInsideThemeColor(OutUIStyle, SUI_THEME_CONTROL_BORDER_COLOR);

    if m_VScrollBar <> nil then
        m_VScrollBar.UIStyle := OutUIStyle;
    Repaint();
end;

procedure TsuiDBListBox.WMLBUTTONDOWN(var Message: TMessage);
begin
    inherited;
    m_MouseDown := true;
    UpdateScrollBars();
end;

procedure TsuiDBListBox.CMVisibleChanged(var Msg: TMEssage);
begin
    inherited;
    if not Visible then
    begin
        if m_VScrollBar <> nil then
            m_VScrollBar.Visible := Visible;
    end
    else
        UpdateScrollBarsPos();
end;

{ TsuiDBComboBox }

constructor TsuiDBComboBox.Create(AOwner: TComponent);
begin
    inherited Create(AOwner);
    ControlStyle := ControlStyle + [csOpaque];
    BorderWidth := 0;

    UIStyle := GetSUIFormStyle(AOwner);

end;

procedure TsuiDBComboBox.Notification(AComponent: TComponent;
  Operation: TOperation);
begin
    inherited;

    if (
        (Operation = opRemove) and
        (AComponent = m_FileTheme)
    )then
    begin
        m_FileTheme := nil;
        SetUIStyle(SUI_THEME_DEFAULT);          
    end;
end;

procedure TsuiDBComboBox.WMPaint(var Msg: TMessage);
begin
    inherited;

    DrawButton();
end;

procedure TsuiDBComboBox.DrawArrow(const ACanvas: TCanvas; X, Y: Integer);
begin
    if not Enabled then
    begin
        ACanvas.Brush.Color := clWhite;
        ACanvas.Pen.Color := clWhite;
        ACanvas.Polygon([Point(X + 1, Y + 1), Point(X + 7, Y + 1), Point(X + 4, Y + 4)]);
        ACanvas.Brush.Color := clGray;
        ACanvas.Pen.Color := clGray;
    end
    else
    begin
        ACanvas.Brush.Color := m_ArrowColor;
        ACanvas.Pen.Color := m_ArrowColor;
    end;

    ACanvas.Polygon([Point(X, Y), Point(X + 6, Y), Point(X + 3, Y + 3)]);
end;

procedure TsuiDBComboBox.DrawButton;
var
    R, ListRect : TRect;
    X, Y : Integer;
    Btn : graphics.TBitmap;
    pcbi : tagCOMBOBOXINFO;
    C: TControlCanvas;
    DesktopCanvas : TCanvas;
begin
    pcbi.cbSize := SizeOf(pcbi);
    if not SUIGetComboBoxInfo(Handle, pcbi) then
        Exit;

    // draw border
    C := TControlCanvas.Create;

    C.Control := Self;
    with C do
    begin
        C.Brush.Color := m_BorderColor;
        R := ClientRect;
        FrameRect(R);
        C.Brush.Color := Color;
        InflateRect(R, -1, -1);
        FrameRect(R);
        GetWindowRect(pcbi.hwndList, ListRect);
        if DroppedDown then
        begin
            DesktopCanvas := TCanvas.Create();
            DesktopCanvas.Handle := GetWindowDC(0);
            DesktopCanvas.Brush.Color := m_BorderColor;
            DesktopCanvas.FrameRect(ListRect);
            ReleaseDC(0, DesktopCanvas.Handle);
            DesktopCanvas.Free();
        end
    end;

    // Draw button
    R := pcbi.rcButton;
    if {$IFDEF RES_MACOS} (m_UIStyle = MacOS) {$ELSE} false {$ENDIF} or
        {$IFDEF RES_WINXP} (m_UIStyle = WinXP){$ELSE} false {$ENDIF} then
    begin
        Btn := graphics.TBitmap.Create();
{$IFDEF RES_MACOS}
        if m_UIStyle = MacOS then
            Btn.LoadFromResourceName(hInstance, 'MACOS_COMBOBOX_BUTTON')
        else
{$ENDIF}
            Btn.LoadFromResourceName(hInstance, 'WINXP_COMBOBOX_BUTTON');
        C.StretchDraw(R, Btn);
        Btn.Free();
    end
    else
    begin
        C.Brush.Color := m_ButtonColor;
        C.FillRect(R);
        C.Pen.Color := m_BorderColor;
        if (BidiMode = bdRightToLeft) and SysLocale.MiddleEast then
        begin
            C.MoveTo(R.Right, R.Top - 1);
            C.LineTo(R.Right, R.Bottom + 1);
        end
        else
        begin
            C.MoveTo(R.Left, R.Top - 1);
            C.LineTo(R.Left, R.Bottom + 1);
        end;
    end;

    X := (R.Right - R.Left) div 2 + R.Left - 3;
    Y := (R.Bottom - R.Top) div 2;
    if {$IFDEF RES_WINXP}m_UIStyle <> WinXP{$ELSE} True {$ENDIF}  then
        DrawArrow(C, X, Y);

    C.Free;
end;

procedure TsuiDBComboBox.SetArrowColor(const Value: TColor);
begin
    m_ArrowColor := Value;
    Repaint();
end;

procedure TsuiDBComboBox.SetBorderColor(const Value: TColor);
begin
    m_BorderColor := Value;
    Repaint();
end;

procedure TsuiDBComboBox.SetButtonColor(const Value: TColor);
begin
    m_ButtonColor := Value;
    Repaint();
end;

procedure TsuiDBComboBox.SetEnabled(Value: Boolean);
begin
    inherited;
    Repaint();
end;

procedure TsuiDBComboBox.SetUIStyle(const Value: TsuiUIStyle);
var
    OutUIStyle : TsuiUIStyle;
begin
    m_UIStyle := Value;

    m_ArrowColor := clBlack;
    if UsingFileTheme(m_FileTheme, m_UIStyle, OutUIStyle) then
    begin
        m_BorderColor := m_FileTheme.GetColor(SKIN2_CONTROLBORDERCOLOR);
        m_ButtonColor := m_FileTheme.GetColor(SKIN2_FORMCOLOR);
    end
    else
    begin
        m_BorderColor := GetInsideThemeColor(OutUIStyle, SUI_THEME_CONTROL_BORDER_COLOR);
        m_ButtonColor := GetInsideThemeColor(OutUIStyle, SUI_THEME_FORM_BACKGROUND_COLOR);
    end;

    Repaint();
end;

procedure TsuiDBComboBox.WMEARSEBKGND(var Msg: TMessage);
begin
    inherited;

    DrawButton();
end;
{$IFDEF SUIPACK_D5}
procedure TsuiDBComboBox.CBNCloseUp(var Msg: TWMCommand);