ground/openpilotgcs/src/plugins/coreplugin/fancyactionbar.cpp

   1 /**
   2  ******************************************************************************
   3  *
   4  * @file       fancyactionbar.cpp
   5  * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
   6  *             Parts by Nokia Corporation (qt-info@nokia.com) Copyright (C) 2009.
   7  * @addtogroup GCSPlugins GCS Plugins
   8  * @{
   9  * @addtogroup CorePlugin Core Plugin
  10  * @{
  11  * @brief The Core GCS plugin
  12  *****************************************************************************/
  13 /*
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 3 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful, but
  20  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  21  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  22  * for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along
  25  * with this program; if not, write to the Free Software Foundation, Inc.,
  26  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  27  */
  28
  29 #include "fancyactionbar.h"
  30
  31 #include <QHBoxLayout>
  32 #include <QPainter>
  33 #include <QPicture>
  34 #include <QVBoxLayout>
  35 #include <QtSvg/QSvgRenderer>
  36 #include <QAction>
  37
  38 using namespace Core;
  39 using namespace Internal;
  40
  41 static const char *const svgIdButtonBase = "ButtonBase";
  42 static const char *const svgIdButtonNormalBase      = "ButtonNormalBase";
  43 static const char *const svgIdButtonNormalOverlay   = "ButtonNormalOverlay";
  44 static const char *const svgIdButtonPressedBase     = "ButtonPressedBase";
  45 static const char *const svgIdButtonPressedOverlay  = "ButtonPressedOverlay";
  46 static const char *const svgIdButtonDisabledOverlay = "ButtonDisabledOverlay";
  47 static const char *const svgIdButtonHoverOverlay    = "ButtonHoverOverlay";
  48
  49 static const char *const elementsSvgIds[] = {
  50     svgIdButtonBase,
  51     svgIdButtonNormalBase,
  52     svgIdButtonNormalOverlay,
  53     svgIdButtonPressedBase,
  54     svgIdButtonPressedOverlay,
  55     svgIdButtonDisabledOverlay,
  56     svgIdButtonHoverOverlay
  57 };
  58
  59 const QMap<QString, QPicture> &buttonElementsMap()
  60 {
  61     static QMap<QString, QPicture> result;
  62
  63     if (result.isEmpty()) {
  64         QSvgRenderer renderer(QLatin1String(":/fancyactionbar/images/fancytoolbutton.svg"));
  65         for (size_t i = 0; i < sizeof(elementsSvgIds) / sizeof(elementsSvgIds[0]); i++) {
  66             QString elementId(elementsSvgIds[i]);
  67             QPicture elementPicture;
  68             QPainter elementPainter(&elementPicture);
  69             renderer.render(&elementPainter, elementId);
  70             result.insert(elementId, elementPicture);
  71         }
  72     }
  73     return result;
  74 }
  75
  76 FancyToolButton::FancyToolButton(QWidget *parent)
  77     : QToolButton(parent)
  78     , m_buttonElements(buttonElementsMap())
  79 {
  80     setAttribute(Qt::WA_Hover, true);
  81     setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
  82 }
  83
  84 void FancyToolButton::paintEvent(QPaintEvent *event)
  85 {
  86     Q_UNUSED(event)
  87     QPainter p(this);
  88     QSize sh(sizeHint());
  89     double scale = (double)height() / sh.height();
  90     if (scale < 1) {
  91         p.save();
  92         p.scale(1, scale);
  93     }
  94     p.drawPicture(0, 0, m_buttonElements.value(svgIdButtonBase));
  95     p.drawPicture(0, 0, m_buttonElements.value(isDown() ? svgIdButtonPressedBase : svgIdButtonNormalBase));
  96 #ifndef Q_WS_MAC // Mac UIs usually don't hover
  97     if (underMouse() && isEnabled()) {
  98         p.drawPicture(0, 0, m_buttonElements.value(svgIdButtonHoverOverlay));
  99     }
 100 #endif
 101
 102     if (scale < 1) {
 103         p.restore();
 104     }
 105
 106     if (!icon().isNull()) {
 107         icon().paint(&p, rect());
 108     } else {
 109         const int margin = 4;
 110         p.drawText(rect().adjusted(margin, margin, -margin, -margin), Qt::AlignCenter | Qt::TextWordWrap, text());
 111     }
 112
 113     if (scale < 1) {
 114         p.scale(1, scale);
 115     }
 116
 117     if (isEnabled()) {
 118         p.drawPicture(0, 0, m_buttonElements.value(isDown() ?
 119                                                    svgIdButtonPressedOverlay : svgIdButtonNormalOverlay));
 120     } else {
 121         p.drawPicture(0, 0, m_buttonElements.value(svgIdButtonDisabledOverlay));
 122     }
 123 }
 124
 125 void FancyActionBar::paintEvent(QPaintEvent *event)
 126 {
 127     Q_UNUSED(event)
 128 }
 129
 130 QSize FancyToolButton::sizeHint() const
 131 {
 132     return m_buttonElements.value(svgIdButtonBase).boundingRect().size();
 133 }
 134
 135 QSize FancyToolButton::minimumSizeHint() const
 136 {
 137     return QSize(8, 8);
 138 }
 139
 140 FancyActionBar::FancyActionBar(QWidget *parent)
 141     : QWidget(parent)
 142 {
 143     m_actionsLayout = new QVBoxLayout;
 144
 145     QHBoxLayout *centeringLayout = new QHBoxLayout;
 146     centeringLayout->addStretch();
 147     centeringLayout->addLayout(m_actionsLayout);
 148     centeringLayout->addStretch();
 149     setLayout(centeringLayout);
 150 }
 151
 152 void FancyActionBar::insertAction(int index, QAction *action, QMenu *menu)
 153 {
 154     FancyToolButton *toolButton = new FancyToolButton(this);
 155
 156     toolButton->setDefaultAction(action);
 157     if (menu) {
 158         toolButton->setMenu(menu);
 159         toolButton->setPopupMode(QToolButton::DelayedPopup);
 160
 161         // execute action also if a context menu item is select
 162         connect(toolButton, SIGNAL(triggered(QAction *)),
 163                 this, SLOT(toolButtonContextMenuActionTriggered(QAction *)),
 164                 Qt::QueuedConnection);
 165     }
 166     m_actionsLayout->insertWidget(index, toolButton);
 167 }
 168
 169 /*
 170    This slot is invoked when a context menu action of a tool button is triggered.
 171    In this case we also want to trigger the default action of the button.
 172
 173    This allows the user e.g. to select and run a specific run configuration with one click.
 174  */
 175 void FancyActionBar::toolButtonContextMenuActionTriggered(QAction *action)
 176 {
 177     if (QToolButton * button = qobject_cast<QToolButton *>(sender())) {
 178         if (action != button->defaultAction()) {
 179             button->defaultAction()->trigger();
 180         }
 181     }
 182 }