Mercurial > hg > orthanc-stone

annotate Applications/Qt/QCairoWidget.cpp @ 284:38b0ac8055b9 am-2

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Qt: catch and forward keyboard events
author am@osimis.io
date Tue, 28 Aug 2018 11:09:37 +0200
parents 829163c6efc1
children 87376a645ee1
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2018 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21 #include "QCairoWidget.h"
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22
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23 #include <QPainter>
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24 #include <QPaintEvent>
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25
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26 #include <stdexcept>
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27
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28 QCairoWidget::QCairoWidget(QWidget *parent) :
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29 QWidget(parent),
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30 context_(NULL)
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31 {
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32 setFocusPolicy(Qt::StrongFocus); // catch keyPressEvents
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33 }
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34
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35 QCairoWidget::~QCairoWidget()
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36 {
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37 }
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38
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39 void QCairoWidget::SetContext(OrthancStone::BasicNativeApplicationContext& context)
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40 {
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41 context_ = &context;
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42 context_->GetCentralViewport().Register(*this); // get notified each time the content of the central viewport changes
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43 }
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44
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45 void QCairoWidget::paintEvent(QPaintEvent* /*event*/)
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46 {
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47 QPainter painter(this);
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48
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49 if (image_.get() != NULL && context_ != NULL)
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50 {
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51 OrthancStone::BasicNativeApplicationContext::GlobalMutexLocker locker(*context_);
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52 OrthancStone::IViewport& viewport = context_->GetCentralViewport();
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53 Orthanc::ImageAccessor a = surface_.GetAccessor();
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54 viewport.Render(a);
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55 painter.drawImage(0, 0, *image_);
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56 }
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57 else
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58 {
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59 painter.fillRect(rect(), Qt::red);
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60 }
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61 }
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62
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63 OrthancStone::KeyboardModifiers GetKeyboardModifiers(QInputEvent* event)
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64 {
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65 Qt::KeyboardModifiers qtModifiers = event->modifiers();
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66 int stoneModifiers = static_cast<int>(OrthancStone::KeyboardModifiers_None);
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67 if ((qtModifiers & Qt::AltModifier) != 0)
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68 {
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69 stoneModifiers |= static_cast<int>(OrthancStone::KeyboardModifiers_Alt);
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70 }
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71 if ((qtModifiers & Qt::ControlModifier) != 0)
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72 {
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73 stoneModifiers |= static_cast<int>(OrthancStone::KeyboardModifiers_Control);
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74 }
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75 if ((qtModifiers & Qt::ShiftModifier) != 0)
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76 {
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77 stoneModifiers |= static_cast<int>(OrthancStone::KeyboardModifiers_Shift);
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78 }
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79 return static_cast<OrthancStone::KeyboardModifiers>(stoneModifiers);
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80 }
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81
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82 void QCairoWidget::mousePressEvent(QMouseEvent* event)
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83 {
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84 OrthancStone::KeyboardModifiers stoneModifiers = GetKeyboardModifiers(event);
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85
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86 OrthancStone::MouseButton button;
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87
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88 switch (event->button())
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89 {
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90 case Qt::LeftButton:
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91 button = OrthancStone::MouseButton_Left;
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92 break;
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93
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94 case Qt::RightButton:
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95 button = OrthancStone::MouseButton_Right;
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96 break;
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97
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98 case Qt::MiddleButton:
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99 button = OrthancStone::MouseButton_Middle;
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100 break;
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101
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102 default:
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103 return; // Unsupported button
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104 }
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105 context_->GetCentralViewport().MouseDown(button, event->pos().x(), event->pos().y(), stoneModifiers);
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106 }
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107
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108
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109 void QCairoWidget::mouseReleaseEvent(QMouseEvent* /*eventNotUsed*/)
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110 {
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111 context_->GetCentralViewport().MouseLeave();
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112 }
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114
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115 void QCairoWidget::mouseMoveEvent(QMouseEvent* event)
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116 {
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117 context_->GetCentralViewport().MouseMove(event->pos().x(), event->pos().y());
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118 }
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120
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121 void QCairoWidget::wheelEvent(QWheelEvent * event)
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122 {
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123 OrthancStone::KeyboardModifiers stoneModifiers = GetKeyboardModifiers(event);
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124
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125 if (event->orientation() == Qt::Vertical)
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126 {
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127 if (event->delta() < 0) // TODO: compare direction with SDL and make sure we send the same directions
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128 {
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129 context_->GetCentralViewport().MouseWheel(OrthancStone::MouseWheelDirection_Up, event->pos().x(), event->pos().y(), stoneModifiers);
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130 }
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131 else
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132 {
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133 context_->GetCentralViewport().MouseWheel(OrthancStone::MouseWheelDirection_Down, event->pos().x(), event->pos().y(), stoneModifiers);
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134 }
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135 }
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136 }
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137
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138 void QCairoWidget::keyPressEvent(QKeyEvent *event)
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139 {
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140 OrthancStone::KeyboardModifiers stoneModifiers = GetKeyboardModifiers(event);
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141
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142 context_->GetCentralViewport().KeyPressed(event->text()[0].toLatin1(), stoneModifiers);
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143 }
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145
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146 void QCairoWidget::resizeEvent(QResizeEvent* event)
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147 {
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148 grabGesture(Qt::PanGesture);
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149 QWidget::resizeEvent(event);
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150
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151 if (event)
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152 {
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153 surface_.SetSize(event->size().width(), event->size().height());
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154
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155 image_.reset(new QImage(reinterpret_cast<uchar*>(surface_.GetBuffer()),
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156 event->size().width(),
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157 event->size().height(),
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158 surface_.GetPitch(),
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159 QImage::Format_RGB32));
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160
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161 context_->GetCentralViewport().SetSize(event->size().width(), event->size().height());
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162
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163 }
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164 }