gwenview/lib/expandbutton.cpp

   1 /*
   2 Gwenview: an image viewer
   3 Copyright 2007 Aurélien Gâteau <aurelien.gateau@free.fr>
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18
  19 */
  20 #include "expandbutton.h"
  21
  22 // Qt
  23 #include <QStyle>
  24 #include <QStyleOption>
  25 #include <QStylePainter>
  26
  27 namespace Gwenview {
  28
  29 static const int INDICATOR_SIZE = 9; // ### hardcoded in qcommonstyle.cpp
  30
  31 ExpandButton::ExpandButton(QWidget* parent)
  32 : QToolButton(parent) {
  33         setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
  34         setAutoRaise(true);
  35         setCheckable(true);
  36 }
  37
  38 QSize ExpandButton::sizeHint() const {
  39         QSize size = QToolButton::sizeHint();
  40         size.setWidth(size.width() + 2*INDICATOR_SIZE);
  41         size.setHeight(fontMetrics().height());
  42         return size;
  43 }
  44
  45 void ExpandButton::paintEvent(QPaintEvent*) {
  46         QStylePainter painter(this);
  47
  48         QStyleOption option;
  49         option.initFrom(this);
  50
  51         // Paint branch indicator
  52         // Code comes from Designer, sheet_delegate.cpp
  53         QStyleOption branchOption;
  54         QRect r = option.rect;
  55         branchOption.rect = QRect(r.left() + INDICATOR_SIZE/2, r.top() + (r.height() - INDICATOR_SIZE)/2, INDICATOR_SIZE, INDICATOR_SIZE);
  56         branchOption.palette = option.palette;
  57         branchOption.state = QStyle::State_Children;
  58
  59         if (isChecked()) {
  60                 branchOption.state |= QStyle::State_Open;
  61         }
  62
  63         style()->drawPrimitive(QStyle::PE_IndicatorBranch, &branchOption, &painter, this);
  64
  65         // Paint text
  66         QRect textRect = rect();
  67         textRect.setLeft(INDICATOR_SIZE * 2);
  68
  69         painter.drawItemText(textRect, Qt::TextShowMnemonic | Qt::AlignVCenter, option.palette, isEnabled(), text());
  70 }
  71
  72
  73 } // namespace