Code/Sandbox/Libs/CryQt/QToolWindowManager/QToolWindowDragHandlerDropTargets.cpp

   1 // Copyright 2001-2018 Crytek GmbH / Crytek Group. All rights reserved.
   2
   3 #include "StdAfx.h"
   4
   5 #include "QToolWindowDragHandlerDropTargets.h"
   6 #include <QPainter>
   7
   8 #define DROPTARGET_PADDING 4
   9
  10 QToolWindowDropTarget::QToolWindowDropTarget(QString imagePath, QToolWindowAreaReference areaReference)
  11         : QWidget(nullptr)
  12         , m_pixmap(new QPixmap())
  13         , m_areaReference(areaReference)
  14 {
  15         setWindowFlags(Qt::Tool | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
  16         setAttribute(Qt::WA_TranslucentBackground);
  17         setAttribute(Qt::WA_ShowWithoutActivating);
  18
  19         m_pixmap->load(imagePath);
  20         setFixedSize(m_pixmap->size());
  21 }
  22
  23 QToolWindowDropTarget::~QToolWindowDropTarget()
  24 {
  25         if (m_pixmap)
  26                 delete m_pixmap;
  27 }
  28
  29 void QToolWindowDropTarget::paintEvent(QPaintEvent *paintEvent)
  30 {
  31         QPainter painter(this);
  32         painter.drawPixmap(0, 0, *m_pixmap);
  33 }
  34
  35 QToolWindowDragHandlerDropTargets::QToolWindowDragHandlerDropTargets(QToolWindowManager* manager)
  36 {
  37         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_COMBINE, ":/QtDockLibrary/gfx/base_window.png").toString(), QToolWindowAreaReference::Combine));
  38         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_TOP, ":/QtDockLibrary/gfx/dock_top.png").toString(), QToolWindowAreaReference::Top));
  39         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_BOTTOM, ":/QtDockLibrary/gfx/dock_bottom.png").toString(), QToolWindowAreaReference::Bottom));
  40         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_LEFT, ":/QtDockLibrary/gfx/dock_left.png").toString(), QToolWindowAreaReference::Left));
  41         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_RIGHT, ":/QtDockLibrary/gfx/dock_right.png").toString(), QToolWindowAreaReference::Right));
  42         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_SPLIT_LEFT, ":/QtDockLibrary/gfx/vsplit_left.png").toString(), QToolWindowAreaReference::VSplitLeft));
  43         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_SPLIT_RIGHT, ":/QtDockLibrary/gfx/vsplit_right.png").toString(), QToolWindowAreaReference::VSplitRight));
  44         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_SPLIT_TOP, ":/QtDockLibrary/gfx/hsplit_top.png").toString(), QToolWindowAreaReference::HSplitTop));
  45         m_targets.append(new QToolWindowDropTarget(manager->config().value(QTWM_DROPTARGET_SPLIT_BOTTOM, ":/QtDockLibrary/gfx/hsplit_bottom.png").toString(), QToolWindowAreaReference::HSplitBottom));
  46
  47         hideTargets();
  48 }
  49
  50 QToolWindowDragHandlerDropTargets::~QToolWindowDragHandlerDropTargets()
  51 {
  52         for (QToolWindowDropTarget* target : m_targets)
  53         {
  54                 delete target;
  55         }
  56 }
  57
  58 void QToolWindowDragHandlerDropTargets::startDrag()
  59 {
  60 }
  61
  62 void QToolWindowDragHandlerDropTargets::switchedArea(IToolWindowArea* lastArea, IToolWindowArea* newArea)
  63 {
  64         if (newArea)
  65         {
  66                 showTargets(newArea);
  67         }
  68         else
  69         {
  70                 hideTargets();
  71         }
  72 }
  73
  74 QToolWindowAreaTarget QToolWindowDragHandlerDropTargets::getTargetFromPosition(IToolWindowArea* area) const
  75 {
  76         QToolWindowAreaTarget result(area, QToolWindowAreaReference::Floating, -1);
  77         if (area)
  78         {
  79                 QWidget* widgetUnderMouse = qApp->widgetAt(QCursor::pos());
  80                 if (isHandlerWidget(widgetUnderMouse))
  81                 {
  82                         result.reference = static_cast<QToolWindowDropTarget*>(widgetUnderMouse)->target();
  83                 }
  84
  85                 if (area && result.reference == QToolWindowAreaReference::Floating)
  86                 {
  87                         QPoint tabPos = area->mapCombineDropAreaFromGlobal(QCursor::pos());
  88                         if (area->combineAreaRect().contains(tabPos))
  89                         {
  90                                 result.reference = QToolWindowAreaReference::Combine;
  91                                 result.index = area->subWidgetAt(tabPos);
  92                         }
  93                 }
  94         }
  95         return result;
  96
  97 }
  98
  99 bool QToolWindowDragHandlerDropTargets::isHandlerWidget(QWidget* widget) const
 100 {
 101         return m_targets.contains(static_cast<QToolWindowDropTarget*>(widget));
 102 }
 103
 104 QToolWindowAreaTarget QToolWindowDragHandlerDropTargets::finishDrag(QList<QWidget*> toolWindows, IToolWindowArea* source, IToolWindowArea* destination)
 105 {
 106         QToolWindowAreaTarget result(destination, QToolWindowAreaReference::Floating, -1);
 107         if (destination)
 108         {
 109                 QWidget* widgetUnderMouse = qApp->widgetAt(QCursor::pos());
 110                 if (isHandlerWidget(widgetUnderMouse))
 111                 {
 112                         result.reference = static_cast<QToolWindowDropTarget*>(widgetUnderMouse)->target();
 113                 }
 114
 115                 if (result.reference == QToolWindowAreaReference::Floating)
 116                 {
 117                         QPoint tabPos = destination->mapCombineDropAreaFromGlobal(QCursor::pos());
 118                         if (destination->combineAreaRect().contains(tabPos))
 119                         {
 120                                 result.reference = QToolWindowAreaReference::Combine;
 121                                 result.index = destination->subWidgetAt(tabPos);
 122                                 if (destination == source && result.index > destination->indexOf(toolWindows[0]))
 123                                 {
 124                                         result.index--;
 125                                 }
 126                         }
 127                 }
 128         }
 129         hideTargets();
 130         return result;
 131 }
 132
 133 IToolWindowDragHandler::SplitSizes QToolWindowDragHandlerDropTargets::getSplitSizes(int originalSize) const
 134 {
 135         IToolWindowDragHandler::SplitSizes result;
 136         result.oldSize = originalSize / 2;
 137         result.newSize = originalSize - result.oldSize;
 138         return result;
 139 }
 140
 141 void QToolWindowDragHandlerDropTargets::hideTargets()
 142 {
 143         for (QToolWindowDropTarget* target : m_targets)
 144         {
 145                 target->hide();
 146         }
 147 }
 148
 149 void QToolWindowDragHandlerDropTargets::showTargets(IToolWindowArea* area)
 150 {
 151         QPoint areaCenter = area->mapToGlobal(QPoint(area->geometry().width() / 2, area->geometry().height() / 2));
 152
 153         QWidget* wrapper = findClosestParent<IToolWindowWrapper*>(area->getWidget())->getContents();
 154         QPoint wrapperCenter = wrapper->mapToGlobal(QPoint(wrapper->geometry().width() / 2, wrapper->geometry().height() / 2));
 155
 156         for (QToolWindowDropTarget* target : m_targets)
 157         {
 158                 QPoint newPos;
 159
 160                 // Position drop targets
 161                 switch (target->target())
 162                 {
 163                 case QToolWindowAreaReference::Combine:
 164                         newPos = areaCenter;
 165                         break;
 166                 case QToolWindowAreaReference::Top:
 167                         newPos = wrapperCenter - QPoint(0, (wrapper->geometry().height() / 2) - target->height() - DROPTARGET_PADDING);
 168                         break;
 169                 case QToolWindowAreaReference::Bottom:
 170                         newPos = wrapperCenter + QPoint(0, (wrapper->geometry().height() / 2) - target->height() - DROPTARGET_PADDING);
 171                         break;
 172                 case QToolWindowAreaReference::Left:
 173                         newPos = wrapperCenter - QPoint((wrapper->geometry().width() / 2) - target->width() - DROPTARGET_PADDING, 0);
 174                         break;
 175                 case QToolWindowAreaReference::Right:
 176                         newPos = wrapperCenter + QPoint((wrapper->geometry().width() / 2) - target->width() - DROPTARGET_PADDING, 0);
 177                         break;
 178                 case QToolWindowAreaReference::HSplitTop:
 179                         newPos = areaCenter - QPoint(0, target->height() + DROPTARGET_PADDING);
 180                         break;
 181                 case QToolWindowAreaReference::HSplitBottom:
 182                         newPos = areaCenter + QPoint(0, target->height() + DROPTARGET_PADDING);
 183                         break;
 184                 case QToolWindowAreaReference::VSplitLeft:
 185                         newPos = areaCenter - QPoint(target->width() + DROPTARGET_PADDING, 0);
 186                         break;
 187                 case QToolWindowAreaReference::VSplitRight:
 188                         newPos = areaCenter + QPoint(target->width() + DROPTARGET_PADDING, 0);
 189                         break;
 190
 191                 default:
 192                         newPos = target->pos();
 193                         break;
 194                 }
 195
 196                 newPos -= QPoint(target->geometry().width() / 2, target->geometry().height() / 2);
 197                 target->move(newPos);
 198                 target->show();
 199                 target->raise();
 200         }
 201 }