Auto status change to "Under Review"
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1 | 1 | #include "Visualization/VisualizationDragDropContainer.h" |
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2 | 2 | #include "DragAndDrop/DragDropHelper.h" |
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3 | 3 | #include "SqpApplication.h" |
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4 | 4 | #include "Visualization/VisualizationDragWidget.h" |
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5 | 5 | |
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6 | 6 | #include "Common/VisualizationDef.h" |
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7 | 7 | |
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8 | 8 | #include <QDrag> |
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9 | 9 | #include <QDragEnterEvent> |
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10 | 10 | #include <QVBoxLayout> |
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11 | 11 | |
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12 | 12 | #include <cmath> |
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13 | 13 | #include <memory> |
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14 | 14 | |
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15 | 15 | Q_LOGGING_CATEGORY(LOG_VisualizationDragDropContainer, "VisualizationDragDropContainer") |
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16 | 16 | |
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17 | auto DRAGGED_MINIATURE_WIDTH = 200; // in pixels | |
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18 | ||
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17 | 19 | struct VisualizationDragDropContainer::VisualizationDragDropContainerPrivate { |
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18 | 20 | |
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19 | 21 | QVBoxLayout *m_Layout; |
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20 | 22 | QHash<QString, VisualizationDragDropContainer::DropBehavior> m_AcceptedMimeTypes; |
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21 | 23 | QString m_PlaceHolderText; |
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22 | 24 | DragDropHelper::PlaceHolderType m_PlaceHolderType = DragDropHelper::PlaceHolderType::Graph; |
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23 | 25 | |
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24 | 26 | VisualizationDragDropContainer::AcceptMimeDataFunction m_AcceptMimeDataFun |
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25 | 27 | = [](auto mimeData) { return true; }; |
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26 | 28 | |
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27 | 29 | int m_MinContainerHeight = 0; |
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28 | 30 | |
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29 | 31 | explicit VisualizationDragDropContainerPrivate(QWidget *widget) |
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30 | 32 | { |
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31 | 33 | m_Layout = new QVBoxLayout(widget); |
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32 | 34 | m_Layout->setContentsMargins(0, 0, 0, 0); |
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33 | 35 | } |
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34 | 36 | |
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35 | 37 | bool acceptMimeData(const QMimeData *data) const |
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36 | 38 | { |
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37 | 39 | for (const auto &type : m_AcceptedMimeTypes.keys()) { |
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38 | 40 | if (data->hasFormat(type) && m_AcceptMimeDataFun(data)) { |
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39 | 41 | return true; |
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40 | 42 | } |
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41 | 43 | } |
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42 | 44 | |
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43 | 45 | return false; |
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44 | 46 | } |
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45 | 47 | |
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46 | 48 | bool allowMergeForMimeData(const QMimeData *data) const |
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47 | 49 | { |
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48 | 50 | bool result = false; |
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49 | 51 | for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd(); |
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50 | 52 | ++it) { |
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51 | 53 | |
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52 | 54 | if (data->hasFormat(it.key()) |
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53 | 55 | && (it.value() == VisualizationDragDropContainer::DropBehavior::Merged |
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54 | 56 | || it.value() |
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55 | 57 | == VisualizationDragDropContainer::DropBehavior::InsertedAndMerged)) { |
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56 | 58 | result = true; |
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57 | 59 | } |
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58 | 60 | else if (data->hasFormat(it.key()) |
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59 | 61 | && it.value() == VisualizationDragDropContainer::DropBehavior::Inserted) { |
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60 | 62 | // Merge is forbidden if the mime data contain an acceptable type which cannot be |
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61 | 63 | // merged |
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62 | 64 | result = false; |
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63 | 65 | break; |
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64 | 66 | } |
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65 | 67 | } |
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66 | 68 | |
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67 | 69 | return result; |
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68 | 70 | } |
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69 | 71 | |
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70 | 72 | bool allowInsertForMimeData(const QMimeData *data) const |
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71 | 73 | { |
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72 | 74 | for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd(); |
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73 | 75 | ++it) { |
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74 | 76 | if (data->hasFormat(it.key()) |
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75 | 77 | && (it.value() == VisualizationDragDropContainer::DropBehavior::Inserted |
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76 | 78 | || it.value() |
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77 | 79 | == VisualizationDragDropContainer::DropBehavior::InsertedAndMerged)) { |
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78 | 80 | return true; |
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79 | 81 | } |
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80 | 82 | } |
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81 | 83 | |
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82 | 84 | return false; |
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83 | 85 | } |
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84 | 86 | |
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85 | 87 | bool hasPlaceHolder() const |
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86 | 88 | { |
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87 | 89 | return sqpApp->dragDropHelper().placeHolder().parentWidget() == m_Layout->parentWidget(); |
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88 | 90 | } |
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89 | 91 | |
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90 | 92 | VisualizationDragWidget *getChildDragWidgetAt(const QWidget *parent, const QPoint &pos) const |
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91 | 93 | { |
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92 | 94 | VisualizationDragWidget *dragWidget = nullptr; |
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93 | 95 | |
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94 | 96 | for (auto child : parent->children()) { |
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95 | 97 | auto widget = qobject_cast<VisualizationDragWidget *>(child); |
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96 | 98 | if (widget && widget->isVisible()) { |
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97 | 99 | if (widget->frameGeometry().contains(pos)) { |
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98 | 100 | dragWidget = widget; |
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99 | 101 | break; |
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100 | 102 | } |
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101 | 103 | } |
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102 | 104 | } |
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103 | 105 | |
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104 | 106 | return dragWidget; |
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105 | 107 | } |
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106 | 108 | |
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107 | 109 | bool cursorIsInContainer(QWidget *container) const |
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108 | 110 | { |
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109 | 111 | return container->isAncestorOf(sqpApp->widgetAt(QCursor::pos())); |
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110 | 112 | } |
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111 | 113 | |
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112 | 114 | int countDragWidget(const QWidget *parent, bool onlyVisible = false) const |
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113 | 115 | { |
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114 | 116 | auto nbGraph = 0; |
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115 | 117 | for (auto child : parent->children()) { |
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116 | 118 | if (qobject_cast<VisualizationDragWidget *>(child)) { |
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117 | 119 | if (!onlyVisible || qobject_cast<VisualizationDragWidget *>(child)->isVisible()) { |
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118 | 120 | nbGraph += 1; |
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119 | 121 | } |
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120 | 122 | } |
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121 | 123 | } |
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122 | 124 | |
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123 | 125 | return nbGraph; |
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124 | 126 | } |
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125 | 127 | |
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126 | 128 | void findPlaceHolderPosition(const QPoint &pos, bool canInsert, bool canMerge, |
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127 | 129 | const VisualizationDragDropContainer *container); |
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128 | 130 | }; |
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129 | 131 | |
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130 | 132 | VisualizationDragDropContainer::VisualizationDragDropContainer(QWidget *parent) |
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131 | 133 | : QFrame{parent}, |
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132 | 134 | impl{spimpl::make_unique_impl<VisualizationDragDropContainerPrivate>(this)} |
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133 | 135 | { |
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134 | 136 | setAcceptDrops(true); |
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135 | 137 | } |
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136 | 138 | |
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137 | 139 | void VisualizationDragDropContainer::addDragWidget(VisualizationDragWidget *dragWidget) |
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138 | 140 | { |
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139 | 141 | impl->m_Layout->addWidget(dragWidget); |
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140 | 142 | disconnect(dragWidget, &VisualizationDragWidget::dragDetected, nullptr, nullptr); |
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141 | 143 | connect(dragWidget, &VisualizationDragWidget::dragDetected, this, |
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142 | 144 | &VisualizationDragDropContainer::startDrag); |
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143 | 145 | } |
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144 | 146 | |
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145 | 147 | void VisualizationDragDropContainer::insertDragWidget(int index, |
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146 | 148 | VisualizationDragWidget *dragWidget) |
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147 | 149 | { |
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148 | 150 | impl->m_Layout->insertWidget(index, dragWidget); |
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149 | 151 | disconnect(dragWidget, &VisualizationDragWidget::dragDetected, nullptr, nullptr); |
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150 | 152 | connect(dragWidget, &VisualizationDragWidget::dragDetected, this, |
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151 | 153 | &VisualizationDragDropContainer::startDrag); |
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152 | 154 | } |
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153 | 155 | |
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154 | 156 | void VisualizationDragDropContainer::addAcceptedMimeType( |
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155 | 157 | const QString &mimeType, VisualizationDragDropContainer::DropBehavior behavior) |
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156 | 158 | { |
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157 | 159 | impl->m_AcceptedMimeTypes[mimeType] = behavior; |
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158 | 160 | } |
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159 | 161 | |
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160 | 162 | int VisualizationDragDropContainer::countDragWidget() const |
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161 | 163 | { |
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162 | 164 | return impl->countDragWidget(this); |
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163 | 165 | } |
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164 | 166 | |
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165 | 167 | void VisualizationDragDropContainer::setAcceptMimeDataFunction( |
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166 | 168 | VisualizationDragDropContainer::AcceptMimeDataFunction fun) |
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167 | 169 | { |
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168 | 170 | impl->m_AcceptMimeDataFun = fun; |
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169 | 171 | } |
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170 | 172 | |
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171 | 173 | void VisualizationDragDropContainer::setPlaceHolderType(DragDropHelper::PlaceHolderType type, |
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172 | 174 | const QString &placeHolderText) |
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173 | 175 | { |
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174 | 176 | impl->m_PlaceHolderType = type; |
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175 | 177 | impl->m_PlaceHolderText = placeHolderText; |
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176 | 178 | } |
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177 | 179 | |
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178 | 180 | void VisualizationDragDropContainer::startDrag(VisualizationDragWidget *dragWidget, |
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179 | 181 | const QPoint &dragPosition) |
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180 | 182 | { |
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181 | 183 | auto &helper = sqpApp->dragDropHelper(); |
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182 | 184 | helper.resetDragAndDrop(); |
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183 | 185 | |
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184 | 186 | // Note: The management of the drag object is done by Qt |
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185 | 187 | auto drag = new QDrag{dragWidget}; |
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186 | drag->setHotSpot(dragPosition); | |
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187 | 188 | |
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188 | 189 | auto mimeData = dragWidget->mimeData(); |
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189 | 190 | drag->setMimeData(mimeData); |
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190 | 191 | |
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191 | 192 | auto pixmap = QPixmap(dragWidget->size()); |
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192 | 193 | dragWidget->render(&pixmap); |
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193 | drag->setPixmap(pixmap); | |
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194 | drag->setPixmap(pixmap.scaled(DRAGGED_MINIATURE_WIDTH, DRAGGED_MINIATURE_WIDTH, | |
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195 | Qt::KeepAspectRatio, Qt::SmoothTransformation)); | |
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194 | 196 | |
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195 | 197 | auto image = pixmap.toImage(); |
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196 | 198 | mimeData->setImageData(image); |
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197 | 199 | mimeData->setUrls({helper.imageTemporaryUrl(image)}); |
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198 | 200 | |
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199 | 201 | if (impl->m_Layout->indexOf(dragWidget) >= 0) { |
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200 | 202 | helper.setCurrentDragWidget(dragWidget); |
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201 | 203 | |
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202 | 204 | if (impl->cursorIsInContainer(this)) { |
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203 | 205 | auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget); |
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204 | 206 | helper.insertPlaceHolder(impl->m_Layout, dragWidgetIndex, impl->m_PlaceHolderType, |
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205 | 207 | impl->m_PlaceHolderText); |
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206 | 208 | dragWidget->setVisible(false); |
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207 | 209 | } |
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208 | 210 | else { |
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209 | 211 | // The drag starts directly outside the drop zone |
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210 | 212 | // do not add the placeHolder |
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211 | 213 | } |
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212 | 214 | |
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213 | 215 | drag->exec(Qt::MoveAction | Qt::CopyAction, Qt::MoveAction); |
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214 | 216 | |
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215 | 217 | helper.doCloseWidgets(); |
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216 | 218 | } |
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217 | 219 | else { |
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218 | 220 | qCWarning(LOG_VisualizationDragDropContainer()) |
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219 | 221 | << tr("VisualizationDragDropContainer::startDrag, drag aborted, the specified " |
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220 | 222 | "VisualizationDragWidget is not found in this container."); |
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221 | 223 | } |
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222 | 224 | } |
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223 | 225 | |
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224 | 226 | void VisualizationDragDropContainer::dragEnterEvent(QDragEnterEvent *event) |
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225 | 227 | { |
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226 | 228 | if (impl->acceptMimeData(event->mimeData())) { |
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227 | 229 | event->acceptProposedAction(); |
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228 | 230 | |
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229 | 231 | auto &helper = sqpApp->dragDropHelper(); |
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230 | 232 | |
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231 | 233 | if (!impl->hasPlaceHolder()) { |
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232 | 234 | auto dragWidget = helper.getCurrentDragWidget(); |
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233 | 235 | |
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234 | 236 | if (dragWidget) { |
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235 | 237 | // If the drag&drop is internal to the visualization, entering the container hide |
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236 | 238 | // the dragWidget which was made visible by the dragLeaveEvent |
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237 | 239 | auto parentWidget |
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238 | 240 | = qobject_cast<VisualizationDragDropContainer *>(dragWidget->parentWidget()); |
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239 | 241 | if (parentWidget) { |
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240 | 242 | dragWidget->setVisible(false); |
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241 | 243 | } |
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242 | 244 | } |
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243 | 245 | |
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244 | 246 | auto canMerge = impl->allowMergeForMimeData(event->mimeData()); |
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245 | 247 | auto canInsert = impl->allowInsertForMimeData(event->mimeData()); |
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246 | 248 | impl->findPlaceHolderPosition(event->pos(), canInsert, canMerge, this); |
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247 | 249 | } |
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248 | 250 | else { |
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249 | 251 | // do nothing |
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250 | 252 | } |
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251 | 253 | } |
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252 | 254 | else { |
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253 | 255 | event->ignore(); |
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254 | 256 | } |
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255 | 257 | |
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256 | 258 | QWidget::dragEnterEvent(event); |
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257 | 259 | } |
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258 | 260 | |
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259 | 261 | void VisualizationDragDropContainer::dragLeaveEvent(QDragLeaveEvent *event) |
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260 | 262 | { |
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261 | 263 | Q_UNUSED(event); |
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262 | 264 | |
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263 | 265 | auto &helper = sqpApp->dragDropHelper(); |
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264 | 266 | |
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265 | 267 | if (!impl->cursorIsInContainer(this)) { |
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266 | 268 | helper.removePlaceHolder(); |
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267 | 269 | helper.setHightlightedDragWidget(nullptr); |
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268 | 270 | impl->m_MinContainerHeight = 0; |
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269 | 271 | |
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270 | 272 | auto dragWidget = helper.getCurrentDragWidget(); |
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271 | 273 | if (dragWidget) { |
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272 | 274 | // dragWidget has a value only if the drag is started from the visualization |
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273 | 275 | // In that case, shows the drag widget at its original place |
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274 | 276 | // So the drag widget doesn't stay hidden if the drop occurs outside the visualization |
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275 | 277 | // drop zone (It is not possible to catch a drop event outside of the application) |
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276 | 278 | |
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277 | 279 | if (dragWidget) { |
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278 | 280 | dragWidget->setVisible(true); |
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279 | 281 | } |
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280 | 282 | } |
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281 | 283 | } |
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282 | 284 | else { |
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283 | 285 | // Leave event probably received for a child widget. |
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284 | 286 | // Do nothing. |
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285 | 287 | // Note: The DragLeave event, doesn't have any mean to determine who sent it. |
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286 | 288 | } |
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287 | 289 | |
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288 | 290 | QWidget::dragLeaveEvent(event); |
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289 | 291 | } |
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290 | 292 | |
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291 | 293 | void VisualizationDragDropContainer::dragMoveEvent(QDragMoveEvent *event) |
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292 | 294 | { |
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293 | 295 | if (impl->acceptMimeData(event->mimeData())) { |
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294 | 296 | auto canMerge = impl->allowMergeForMimeData(event->mimeData()); |
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295 | 297 | auto canInsert = impl->allowInsertForMimeData(event->mimeData()); |
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296 | 298 | impl->findPlaceHolderPosition(event->pos(), canInsert, canMerge, this); |
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297 | 299 | } |
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298 | 300 | else { |
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299 | 301 | event->ignore(); |
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300 | 302 | } |
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301 | 303 | |
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302 | 304 | QWidget::dragMoveEvent(event); |
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303 | 305 | } |
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304 | 306 | |
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305 | 307 | void VisualizationDragDropContainer::dropEvent(QDropEvent *event) |
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306 | 308 | { |
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307 | 309 | auto &helper = sqpApp->dragDropHelper(); |
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308 | 310 | |
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309 | 311 | if (impl->acceptMimeData(event->mimeData())) { |
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310 | 312 | auto dragWidget = helper.getCurrentDragWidget(); |
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311 | 313 | if (impl->hasPlaceHolder()) { |
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312 | 314 | // drop where the placeHolder is located |
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313 | 315 | |
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314 | 316 | auto canInsert = impl->allowInsertForMimeData(event->mimeData()); |
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315 | 317 | if (canInsert) { |
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316 | 318 | auto droppedIndex = impl->m_Layout->indexOf(&helper.placeHolder()); |
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317 | 319 | |
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318 | 320 | if (dragWidget) { |
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319 | 321 | auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget); |
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320 | 322 | if (dragWidgetIndex >= 0 && dragWidgetIndex < droppedIndex) { |
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321 | 323 | // Correction of the index if the drop occurs in the same container |
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322 | 324 | // and if the drag is started from the visualization (in that case, the |
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323 | 325 | // dragWidget is hidden) |
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324 | 326 | droppedIndex -= 1; |
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325 | 327 | } |
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326 | 328 | |
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327 | 329 | dragWidget->setVisible(true); |
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328 | 330 | } |
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329 | 331 | |
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330 | 332 | event->acceptProposedAction(); |
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331 | 333 | |
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332 | 334 | helper.removePlaceHolder(); |
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333 | 335 | |
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334 | 336 | emit dropOccuredInContainer(droppedIndex, event->mimeData()); |
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335 | 337 | } |
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336 | 338 | else { |
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337 | 339 | qCWarning(LOG_VisualizationDragDropContainer()) << tr( |
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338 | 340 | "VisualizationDragDropContainer::dropEvent, dropping on the placeHolder, but " |
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339 | 341 | "the insertion is forbidden."); |
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340 | 342 | Q_ASSERT(false); |
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341 | 343 | } |
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342 | 344 | } |
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343 | 345 | else if (helper.getHightlightedDragWidget()) { |
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344 | 346 | // drop on the highlighted widget |
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345 | 347 | |
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346 | 348 | auto canMerge = impl->allowMergeForMimeData(event->mimeData()); |
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347 | 349 | if (canMerge) { |
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348 | 350 | event->acceptProposedAction(); |
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349 | 351 | emit dropOccuredOnWidget(helper.getHightlightedDragWidget(), event->mimeData()); |
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350 | 352 | } |
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351 | 353 | else { |
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352 | 354 | qCWarning(LOG_VisualizationDragDropContainer()) |
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353 | 355 | << tr("VisualizationDragDropContainer::dropEvent, dropping on a widget, but " |
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354 | 356 | "the merge is forbidden."); |
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355 | 357 | Q_ASSERT(false); |
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356 | 358 | } |
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357 | 359 | } |
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358 | 360 | } |
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359 | 361 | else { |
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360 | 362 | event->ignore(); |
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361 | 363 | } |
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362 | 364 | |
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363 | 365 | sqpApp->dragDropHelper().setHightlightedDragWidget(nullptr); |
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364 | 366 | impl->m_MinContainerHeight = 0; |
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365 | 367 | |
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366 | 368 | QWidget::dropEvent(event); |
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367 | 369 | } |
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368 | 370 | |
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369 | 371 | |
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370 | 372 | void VisualizationDragDropContainer::VisualizationDragDropContainerPrivate::findPlaceHolderPosition( |
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371 | 373 | const QPoint &pos, bool canInsert, bool canMerge, |
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372 | 374 | const VisualizationDragDropContainer *container) |
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373 | 375 | { |
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374 | 376 | auto &helper = sqpApp->dragDropHelper(); |
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375 | 377 | |
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376 | 378 | auto absPos = container->mapToGlobal(pos); |
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377 | 379 | auto isOnPlaceHolder = sqpApp->widgetAt(absPos) == &(helper.placeHolder()); |
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378 | 380 | |
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379 | 381 | if (countDragWidget(container, true) == 0) { |
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380 | 382 | // Drop on an empty container, just add the placeHolder at the top |
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381 | 383 | helper.insertPlaceHolder(m_Layout, 0, m_PlaceHolderType, m_PlaceHolderText); |
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382 | 384 | } |
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383 | 385 | else if (!isOnPlaceHolder) { |
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384 | 386 | auto nbDragWidget = countDragWidget(container); |
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385 | 387 | if (nbDragWidget > 0) { |
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386 | 388 | |
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387 | 389 | if (m_MinContainerHeight == 0) { |
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388 | 390 | m_MinContainerHeight = container->size().height(); |
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389 | 391 | } |
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390 | 392 | |
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391 | 393 | m_MinContainerHeight = qMin(m_MinContainerHeight, container->size().height()); |
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392 | 394 | auto graphHeight = qMax(m_MinContainerHeight / nbDragWidget, GRAPH_MINIMUM_HEIGHT); |
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393 | 395 | |
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394 | 396 | auto posY = pos.y(); |
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395 | 397 | auto dropIndex = floor(posY / graphHeight); |
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396 | 398 | auto zoneSize = qMin(graphHeight / 4.0, 75.0); |
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397 | 399 | |
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398 | 400 | |
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399 | 401 | auto isOnTop = posY < dropIndex * graphHeight + zoneSize; |
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400 | 402 | auto isOnBottom = posY > (dropIndex + 1) * graphHeight - zoneSize; |
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401 | 403 | |
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402 | 404 | auto placeHolderIndex = m_Layout->indexOf(&(helper.placeHolder())); |
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403 | 405 | |
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404 | 406 | auto dragWidgetHovered = getChildDragWidgetAt(container, pos); |
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405 | 407 | |
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406 | 408 | if (canInsert && (isOnTop || isOnBottom || !canMerge)) { |
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407 | 409 | if (isOnBottom) { |
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408 | 410 | dropIndex += 1; |
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409 | 411 | } |
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410 | 412 | |
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411 | 413 | if (helper.getCurrentDragWidget()) { |
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412 | 414 | auto dragWidgetIndex = m_Layout->indexOf(helper.getCurrentDragWidget()); |
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413 | 415 | if (dragWidgetIndex >= 0 && dragWidgetIndex <= dropIndex) { |
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414 | 416 | // Correction of the index if the drop occurs in the same container |
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415 | 417 | // and if the drag is started from the visualization (in that case, the |
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416 | 418 | // dragWidget is hidden) |
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417 | 419 | dropIndex += 1; |
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418 | 420 | } |
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419 | 421 | } |
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420 | 422 | |
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421 | 423 | if (dropIndex != placeHolderIndex) { |
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422 | 424 | helper.insertPlaceHolder(m_Layout, dropIndex, m_PlaceHolderType, |
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423 | 425 | m_PlaceHolderText); |
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424 | 426 | } |
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425 | 427 | |
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426 | 428 | helper.setHightlightedDragWidget(nullptr); |
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427 | 429 | } |
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428 | 430 | else if (canMerge && dragWidgetHovered) { |
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429 | 431 | // drop on the middle -> merge |
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430 | 432 | if (hasPlaceHolder()) { |
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431 | 433 | helper.removePlaceHolder(); |
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432 | 434 | } |
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433 | 435 | |
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434 | 436 | helper.setHightlightedDragWidget(dragWidgetHovered); |
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435 | 437 | } |
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436 | 438 | else { |
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437 | 439 | qCWarning(LOG_VisualizationDragDropContainer()) |
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438 | 440 | << tr("VisualizationDragDropContainer::findPlaceHolderPosition, no valid drop " |
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439 | 441 | "action."); |
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440 | 442 | } |
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441 | 443 | } |
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442 | 444 | else { |
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443 | 445 | qCWarning(LOG_VisualizationDragDropContainer()) |
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444 | 446 | << tr("VisualizationDragDropContainer::findPlaceHolderPosition, no widget " |
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445 | 447 | "found in the " |
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446 | 448 | "container"); |
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447 | 449 | } |
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448 | 450 | } |
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449 | 451 | else { |
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450 | 452 | // the mouse is hover the placeHolder |
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451 | 453 | // Do nothing |
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452 | 454 | } |
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453 | 455 | } |
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