src/libs/utils/detailswidget.cpp

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  33
  34 #include "detailswidget.h"
  35 #include "detailsbutton.h"
  36
  37 #include <QtCore/QStack>
  38 #include <QtCore/QPropertyAnimation>
  39
  40 #include <QtGui/QGridLayout>
  41 #include <QtGui/QLabel>
  42 #include <QtGui/QPainter>
  43 #include <QtGui/QScrollArea>
  44 #include <QtGui/QApplication>
  45
  46 namespace Utils {
  47
  48     static const int MARGIN=8;
  49
  50     // This widget is using a grid layout and places the items
  51     // in the following way:
  52     //
  53     // +------------+-------------------------+---------------+
  54     // +summaryLabel|              toolwidget | detailsButton |
  55     // +------------+-------------------------+---------------+
  56     // |                  widget                              |
  57     // +------------+-------------------------+---------------+
  58
  59     struct DetailsWidgetPrivate {
  60         DetailsWidgetPrivate();
  61
  62         DetailsButton *m_detailsButton;
  63         QGridLayout *m_grid;
  64         QLabel *m_summaryLabel;
  65         Utils::FadingPanel *m_toolWidget;
  66         QWidget *m_widget;
  67
  68         QPixmap m_collapsedPixmap;
  69         QPixmap m_expandedPixmap;
  70
  71         DetailsWidget::State m_state;
  72         bool m_hovered;
  73     };
  74
  75     DetailsWidgetPrivate::DetailsWidgetPrivate() :
  76             m_detailsButton(new DetailsButton),
  77             m_grid(new QGridLayout),
  78             m_summaryLabel(new QLabel),
  79             m_toolWidget(0),
  80             m_widget(0),
  81             m_state(DetailsWidget::Collapsed),
  82             m_hovered(false)
  83     {
  84     }
  85
  86     DetailsWidget::DetailsWidget(QWidget *parent) :
  87             QWidget(parent),
  88             d(new DetailsWidgetPrivate)
  89     {
  90         d->m_summaryLabel->setTextInteractionFlags(Qt::TextSelectableByMouse);
  91         d->m_summaryLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
  92         d->m_summaryLabel->setContentsMargins(MARGIN, MARGIN, MARGIN, MARGIN);
  93
  94         d->m_grid->setContentsMargins(0, 0, 0, 0);
  95         d->m_grid->setSpacing(0);
  96         d->m_grid->addWidget(d->m_summaryLabel, 0, 0);
  97         d->m_grid->addWidget(d->m_detailsButton, 0, 2);
  98         setLayout(d->m_grid);
  99
 100         connect(d->m_detailsButton, SIGNAL(toggled(bool)),
 101                 this, SLOT(setExpanded(bool)));
 102         updateControls();
 103     }
 104
 105     DetailsWidget::~DetailsWidget()
 106     {
 107         delete d;
 108     }
 109
 110     void DetailsWidget::paintEvent(QPaintEvent *paintEvent)
 111     {
 112         QWidget::paintEvent(paintEvent);
 113
 114         QPainter p(this);
 115
 116         QPoint topLeft(d->m_summaryLabel->geometry().left(), contentsRect().top());
 117         const QRect paintArea(topLeft, contentsRect().bottomRight());
 118
 119         if (d->m_state != Expanded) {
 120             if (d->m_collapsedPixmap.isNull() ||
 121                 d->m_collapsedPixmap.size() != size())
 122                 d->m_collapsedPixmap = cacheBackground(paintArea.size(), false);
 123             p.drawPixmap(paintArea, d->m_collapsedPixmap);
 124         } else {
 125             if (d->m_expandedPixmap.isNull() ||
 126                 d->m_expandedPixmap.size() != size())
 127                 d->m_expandedPixmap = cacheBackground(paintArea.size(), true);
 128             p.drawPixmap(paintArea, d->m_expandedPixmap);
 129         }
 130     }
 131
 132     void DetailsWidget::enterEvent(QEvent * event)
 133     {
 134         QWidget::enterEvent(event);
 135         changeHoverState(true);
 136     }
 137
 138     void DetailsWidget::leaveEvent(QEvent * event)
 139     {
 140         QWidget::leaveEvent(event);
 141         changeHoverState(false);
 142     }
 143
 144     void DetailsWidget::setSummaryText(const QString &text)
 145     {
 146         d->m_summaryLabel->setText(text);
 147     }
 148
 149     QString DetailsWidget::summaryText() const
 150     {
 151         return d->m_summaryLabel->text();
 152     }
 153
 154     DetailsWidget::State DetailsWidget::state() const
 155     {
 156         return d->m_state;
 157     }
 158
 159     void DetailsWidget::setState(State state)
 160     {
 161         if (state == d->m_state)
 162             return;
 163         d->m_state = state;
 164         updateControls();
 165     }
 166
 167     void DetailsWidget::setExpanded(bool expanded)
 168     {
 169         setState(expanded ? Expanded : Collapsed);
 170     }
 171
 172     void DetailsWidget::updateControls()
 173     {
 174         if (d->m_widget)
 175             d->m_widget->setVisible(d->m_state == Expanded || d->m_state == NoSummary);
 176         d->m_detailsButton->setChecked(d->m_state == Expanded && d->m_widget);
 177         //d->m_summaryLabel->setEnabled(d->m_state == Collapsed && d->m_widget);
 178         d->m_detailsButton->setVisible(d->m_state != NoSummary);
 179         d->m_summaryLabel->setVisible(d->m_state != NoSummary);
 180         {
 181             QWidget *w = this;
 182             while (w) {
 183                 if (w->layout())
 184                     w->layout()->activate();
 185                 if (QScrollArea *area = qobject_cast<QScrollArea*>(w)) {
 186                     QEvent e(QEvent::LayoutRequest);
 187                     QCoreApplication::sendEvent(area, &e);
 188                 }
 189                 w = w->parentWidget();
 190             }
 191         }
 192     }
 193
 194     QWidget *DetailsWidget::widget() const
 195     {
 196         return d->m_widget;
 197     }
 198
 199     void DetailsWidget::setWidget(QWidget *widget)
 200     {
 201         if (d->m_widget == widget)
 202             return;
 203
 204         if (d->m_widget) {
 205             d->m_grid->removeWidget(d->m_widget);
 206             delete d->m_widget;
 207         }
 208
 209         d->m_widget = widget;
 210
 211         if (d->m_widget) {
 212             d->m_widget->setContentsMargins(MARGIN, MARGIN, MARGIN, MARGIN);
 213             d->m_grid->addWidget(d->m_widget, 1, 0, 1, 3);
 214         }
 215         updateControls();
 216     }
 217
 218     void DetailsWidget::setToolWidget(Utils::FadingPanel *widget)
 219     {
 220         if (d->m_toolWidget == widget)
 221             return;
 222
 223         d->m_toolWidget = widget;
 224
 225         if (!d->m_toolWidget)
 226             return;
 227
 228         d->m_toolWidget->adjustSize();
 229         d->m_grid->addWidget(d->m_toolWidget, 0, 1, 1, 1, Qt::AlignRight);
 230
 231 #ifdef Q_WS_MAC
 232         d->m_toolWidget->setOpacity(1.0);
 233 #endif
 234         changeHoverState(d->m_hovered);
 235     }
 236
 237     QWidget *DetailsWidget::toolWidget() const
 238     {
 239         return d->m_toolWidget;
 240     }
 241
 242     QPixmap DetailsWidget::cacheBackground(const QSize &size, bool expanded)
 243     {
 244         QPixmap pixmap(size);
 245         pixmap.fill(Qt::transparent);
 246         QPainter p(&pixmap);
 247
 248         QRect topRect(0, 0, size.width(), d->m_summaryLabel->height());
 249         QRect fullRect(0, 0, size.width(), size.height());
 250         p.fillRect(fullRect, QColor(255, 255, 255, 40));
 251
 252         QColor highlight = palette().highlight().color();
 253         highlight.setAlpha(0.5);
 254         if (expanded) {
 255             p.fillRect(topRect, highlight);
 256         }
 257
 258         QLinearGradient lg(topRect.topLeft(), topRect.bottomLeft());
 259         lg.setColorAt(0, QColor(255, 255, 255, 130));
 260         lg.setColorAt(1, QColor(255, 255, 255, 0));
 261         p.fillRect(topRect, lg);
 262         p.setRenderHint(QPainter::Antialiasing, true);
 263         p.translate(0.5, 0.5);
 264         p.setPen(QColor(0, 0, 0, 40));
 265         p.setBrush(Qt::NoBrush);
 266         p.drawRoundedRect(fullRect.adjusted(0, 0, -1, -1), 2, 2);
 267         p.setBrush(Qt::NoBrush);
 268         p.setPen(QColor(255,255,255,140));
 269         p.drawRoundedRect(fullRect.adjusted(1, 1, -2, -2), 2, 2);
 270         p.setPen(QPen(palette().color(QPalette::Mid)));
 271
 272         return pixmap;
 273     }
 274
 275     void DetailsWidget::changeHoverState(bool hovered)
 276     {
 277         if (!d->m_toolWidget)
 278             return;
 279 #ifdef Q_OS_MAC
 280         d->m_toolWidget->setVisible(hovered);
 281 #else
 282         d->m_toolWidget->fadeTo(hovered ? 1.0 : 0);
 283 #endif
 284         d->m_hovered = hovered;
 285     }
 286
 287 } // namespace Utils