Auto status change to "Under Review"
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1 | 1 | #include "Visualization/VisualizationDragDropContainer.h" |
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2 | 2 | #include "DragAndDrop/DragDropGuiController.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 | 17 | auto DRAGGED_MINIATURE_WIDTH = 200; // in pixels |
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18 | 18 | |
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19 | 19 | struct VisualizationDragDropContainer::VisualizationDragDropContainerPrivate { |
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20 | 20 | |
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21 | 21 | QVBoxLayout *m_Layout; |
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22 | 22 | QHash<QString, VisualizationDragDropContainer::DropBehavior> m_AcceptedMimeTypes; |
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23 | 23 | QString m_PlaceHolderText; |
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24 | 24 | DragDropGuiController::PlaceHolderType m_PlaceHolderType; |
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25 | 25 | |
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26 | 26 | VisualizationDragDropContainer::AcceptMimeDataFunction m_AcceptMimeDataFun |
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27 | 27 | = [](auto mimeData) { return true; }; |
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28 | 28 | VisualizationDragDropContainer::AcceptDragWidgetFunction m_AcceptDragWidgetFun |
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29 | 29 | = [](auto dragWidget, auto mimeData) { return true; }; |
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30 | 30 | |
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31 | 31 | int m_MinContainerHeight = 0; |
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32 | 32 | |
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33 | 33 | explicit VisualizationDragDropContainerPrivate(QWidget *widget) |
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34 | 34 | : m_PlaceHolderType(DragDropGuiController::PlaceHolderType::Graph) |
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35 | 35 | { |
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36 | 36 | m_Layout = new QVBoxLayout(widget); |
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37 | 37 | m_Layout->setContentsMargins(0, 0, 0, 0); |
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38 | 38 | } |
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39 | 39 | |
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40 | 40 | bool acceptMimeData(const QMimeData *data) const |
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41 | 41 | { |
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42 | 42 | auto accepted = false; |
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43 | 43 | for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd(); |
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44 | 44 | ++it) { |
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45 | 45 | const auto &type = it.key(); |
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46 | 46 | const auto &behavior = it.value(); |
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47 | 47 | |
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48 | 48 | if (data->hasFormat(type)) { |
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49 | 49 | if (behavior != DropBehavior::Forbidden) { |
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50 | 50 | accepted = true; |
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51 | 51 | } |
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52 | 52 | else { |
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53 | 53 | accepted = false; |
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54 | 54 | break; |
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55 | 55 | } |
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56 | 56 | } |
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57 | 57 | } |
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58 | 58 | |
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59 | 59 | if (accepted) { |
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60 | 60 | accepted = m_AcceptMimeDataFun(data); |
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61 | 61 | } |
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62 | 62 | |
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63 | 63 | return accepted; |
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64 | 64 | } |
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65 | 65 | |
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66 | 66 | bool allowMergeForMimeData(const QMimeData *data) const |
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67 | 67 | { |
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68 | 68 | auto result = false; |
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69 | 69 | for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd(); |
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70 | 70 | ++it) { |
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71 | 71 | |
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72 | 72 | if (data->hasFormat(it.key()) |
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73 | 73 | && (it.value() == VisualizationDragDropContainer::DropBehavior::Merged |
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74 | 74 | || it.value() |
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75 | 75 | == VisualizationDragDropContainer::DropBehavior::InsertedAndMerged)) { |
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76 | 76 | result = true; |
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77 | 77 | } |
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78 | 78 | else if (data->hasFormat(it.key()) |
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79 | 79 | && it.value() == VisualizationDragDropContainer::DropBehavior::Inserted) { |
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80 | 80 | // Merge is forbidden if the mime data contain an acceptable type which cannot be |
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81 | 81 | // merged |
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82 | 82 | result = false; |
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83 | 83 | break; |
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84 | 84 | } |
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85 | 85 | } |
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86 | 86 | |
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87 | 87 | return result; |
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88 | 88 | } |
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89 | 89 | |
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90 | 90 | bool allowInsertForMimeData(const QMimeData *data) const |
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91 | 91 | { |
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92 | 92 | for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd(); |
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93 | 93 | ++it) { |
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94 | 94 | if (data->hasFormat(it.key()) |
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95 | 95 | && (it.value() == VisualizationDragDropContainer::DropBehavior::Inserted |
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96 | 96 | || it.value() |
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97 | 97 | == VisualizationDragDropContainer::DropBehavior::InsertedAndMerged)) { |
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98 | 98 | return true; |
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99 | 99 | } |
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100 | 100 | } |
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101 | 101 | |
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102 | 102 | return false; |
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103 | 103 | } |
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104 | 104 | |
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105 | 105 | bool hasPlaceHolder() const |
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106 | 106 | { |
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107 | 107 | return sqpApp->dragDropGuiController().placeHolder().parentWidget() |
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108 | 108 | == m_Layout->parentWidget(); |
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109 | 109 | } |
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110 | 110 | |
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111 | 111 | VisualizationDragWidget *getChildDragWidgetAt(const QWidget *parent, const QPoint &pos) const |
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112 | 112 | { |
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113 | 113 | VisualizationDragWidget *dragWidget = nullptr; |
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114 | 114 | |
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115 | 115 | for (auto child : parent->children()) { |
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116 | 116 | auto widget = qobject_cast<VisualizationDragWidget *>(child); |
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117 | 117 | if (widget && widget->isVisible()) { |
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118 | 118 | if (widget->frameGeometry().contains(pos)) { |
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119 | 119 | dragWidget = widget; |
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120 | 120 | break; |
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121 | 121 | } |
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122 | 122 | } |
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123 | 123 | } |
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124 | 124 | |
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125 | 125 | return dragWidget; |
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126 | 126 | } |
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127 | 127 | |
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128 | 128 | bool cursorIsInContainer(QWidget *container) const |
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129 | 129 | { |
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130 | 130 | auto widgetUnderMouse = sqpApp->widgetAt(QCursor::pos()); |
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131 | 131 | return container->isAncestorOf(widgetUnderMouse) && widgetUnderMouse != container |
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132 | 132 | && sqpApp->dragDropGuiController().placeHolder().isAncestorOf(widgetUnderMouse); |
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133 | 133 | } |
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134 | 134 | |
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135 | 135 | int countDragWidget(const QWidget *parent, bool onlyVisible = false) const |
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136 | 136 | { |
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137 | 137 | auto nbGraph = 0; |
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138 | 138 | for (auto child : parent->children()) { |
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139 | 139 | if (qobject_cast<VisualizationDragWidget *>(child)) { |
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140 | 140 | if (!onlyVisible || qobject_cast<VisualizationDragWidget *>(child)->isVisible()) { |
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141 | 141 | nbGraph += 1; |
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142 | 142 | } |
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143 | 143 | } |
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144 | 144 | } |
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145 | 145 | |
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146 | 146 | return nbGraph; |
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147 | 147 | } |
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148 | 148 | |
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149 | 149 | bool findPlaceHolderPosition(const QPoint &pos, const QMimeData *mimeData, bool canInsert, |
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150 | 150 | bool canMerge, const VisualizationDragDropContainer *container); |
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151 | 151 | }; |
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152 | 152 | |
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153 | 153 | VisualizationDragDropContainer::VisualizationDragDropContainer(QWidget *parent) |
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154 | 154 | : QFrame{parent}, |
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155 | 155 | impl{spimpl::make_unique_impl<VisualizationDragDropContainerPrivate>(this)} |
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156 | 156 | { |
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157 | 157 | setAcceptDrops(true); |
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158 | 158 | } |
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159 | 159 | |
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160 | 160 | void VisualizationDragDropContainer::addDragWidget(VisualizationDragWidget *dragWidget) |
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161 | 161 | { |
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162 | 162 | impl->m_Layout->addWidget(dragWidget); |
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163 | 163 | disconnect(dragWidget, &VisualizationDragWidget::dragDetected, nullptr, nullptr); |
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164 | 164 | connect(dragWidget, &VisualizationDragWidget::dragDetected, this, |
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165 | 165 | &VisualizationDragDropContainer::startDrag); |
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166 | 166 | } |
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167 | 167 | |
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168 | 168 | void VisualizationDragDropContainer::insertDragWidget(int index, |
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169 | 169 | VisualizationDragWidget *dragWidget) |
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170 | 170 | { |
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171 | 171 | impl->m_Layout->insertWidget(index, dragWidget); |
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172 | 172 | disconnect(dragWidget, &VisualizationDragWidget::dragDetected, nullptr, nullptr); |
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173 | 173 | connect(dragWidget, &VisualizationDragWidget::dragDetected, this, |
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174 | 174 | &VisualizationDragDropContainer::startDrag); |
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175 | 175 | } |
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176 | 176 | |
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177 | 177 | void VisualizationDragDropContainer::setMimeType( |
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178 | 178 | const QString &mimeType, VisualizationDragDropContainer::DropBehavior behavior) |
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179 | 179 | { |
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180 | 180 | impl->m_AcceptedMimeTypes[mimeType] = behavior; |
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181 | 181 | } |
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182 | 182 | |
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183 | 183 | int VisualizationDragDropContainer::countDragWidget() const |
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184 | 184 | { |
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185 | 185 | return impl->countDragWidget(this); |
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186 | 186 | } |
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187 | 187 | |
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188 | 188 | void VisualizationDragDropContainer::setAcceptMimeDataFunction( |
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189 | 189 | VisualizationDragDropContainer::AcceptMimeDataFunction fun) |
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190 | 190 | { |
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191 | 191 | impl->m_AcceptMimeDataFun = fun; |
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192 | 192 | } |
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193 | 193 | |
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194 | 194 | void VisualizationDragDropContainer::setAcceptDragWidgetFunction( |
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195 | 195 | VisualizationDragDropContainer::AcceptDragWidgetFunction fun) |
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196 | 196 | { |
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197 | 197 | impl->m_AcceptDragWidgetFun = fun; |
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198 | 198 | } |
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199 | 199 | |
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200 | 200 | void VisualizationDragDropContainer::setPlaceHolderType(DragDropGuiController::PlaceHolderType type, |
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201 | 201 | const QString &placeHolderText) |
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202 | 202 | { |
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203 | 203 | impl->m_PlaceHolderType = type; |
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204 | 204 | impl->m_PlaceHolderText = placeHolderText; |
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205 | 205 | } |
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206 | 206 | |
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207 | 207 | void VisualizationDragDropContainer::startDrag(VisualizationDragWidget *dragWidget, |
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208 | 208 | const QPoint &dragPosition) |
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209 | 209 | { |
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210 | 210 | auto &helper = sqpApp->dragDropGuiController(); |
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211 | 211 | helper.resetDragAndDrop(); |
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212 | 212 | |
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213 | 213 | // Note: The management of the drag object is done by Qt |
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214 | 214 | auto drag = new QDrag{dragWidget}; |
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215 | 215 | |
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216 | 216 | auto mimeData = dragWidget->mimeData(dragPosition); |
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217 | 217 | drag->setMimeData(mimeData); |
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218 | 218 | |
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219 | 219 | auto pixmap = dragWidget->customDragPixmap(dragPosition); |
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220 | 220 | if (pixmap.isNull()) { |
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221 | 221 | pixmap = QPixmap{dragWidget->size()}; |
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222 | 222 | dragWidget->render(&pixmap); |
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223 | 223 | } |
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224 | 224 | |
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225 | 225 | drag->setPixmap(pixmap.scaled(DRAGGED_MINIATURE_WIDTH, DRAGGED_MINIATURE_WIDTH, |
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226 | 226 | Qt::KeepAspectRatio, Qt::SmoothTransformation)); |
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227 | 227 | |
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228 | 228 | auto image = pixmap.toImage(); |
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229 | 229 | mimeData->setImageData(image); |
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230 | 230 | mimeData->setUrls({helper.imageTemporaryUrl(image)}); |
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231 | 231 | |
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232 | 232 | if (impl->m_Layout->indexOf(dragWidget) >= 0) { |
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233 | 233 | |
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234 | 234 | if (impl->acceptMimeData(mimeData) && impl->allowInsertForMimeData(mimeData)) { |
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235 | 235 | helper.setCurrentDragWidget(dragWidget); |
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236 | 236 | |
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237 | 237 | if (impl->cursorIsInContainer(this)) { |
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238 | 238 | auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget); |
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239 | 239 | helper.insertPlaceHolder(impl->m_Layout, dragWidgetIndex, impl->m_PlaceHolderType, |
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240 | 240 | impl->m_PlaceHolderText); |
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241 | 241 | dragWidget->setVisible(false); |
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242 | 242 | } |
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243 | 243 | else { |
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244 | 244 | // The drag starts directly outside the drop zone |
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245 | 245 | // do not add the placeHolder |
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246 | 246 | } |
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247 | 247 | } |
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248 | 248 | |
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249 | 249 | drag->exec(Qt::MoveAction | Qt::CopyAction, Qt::MoveAction); |
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250 | 250 | |
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251 | 251 | helper.doCloseWidgets(); |
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252 | 252 | } |
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253 | 253 | else { |
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254 | 254 | qCWarning(LOG_VisualizationDragDropContainer()) |
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255 | 255 | << tr("VisualizationDragDropContainer::startDrag, drag aborted, the specified " |
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256 | 256 | "VisualizationDragWidget is not found in this container."); |
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257 | 257 | } |
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258 | 258 | } |
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259 | 259 | |
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260 | 260 | void VisualizationDragDropContainer::dragEnterEvent(QDragEnterEvent *event) |
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261 | 261 | { |
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262 | 262 | if (impl->acceptMimeData(event->mimeData())) { |
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263 | 263 | event->acceptProposedAction(); |
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264 | 264 | |
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265 | 265 | auto &helper = sqpApp->dragDropGuiController(); |
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266 | 266 | |
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267 | 267 | if (!impl->hasPlaceHolder()) { |
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268 | 268 | auto dragWidget = helper.getCurrentDragWidget(); |
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269 | 269 | |
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270 | 270 | if (dragWidget) { |
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271 | 271 | // If the drag&drop is internal to the visualization, entering the container hide |
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272 | 272 | // the dragWidget which was made visible by the dragLeaveEvent |
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273 | 273 | auto parentWidget |
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274 | 274 | = qobject_cast<VisualizationDragDropContainer *>(dragWidget->parentWidget()); |
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275 | 275 | if (parentWidget) { |
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276 | 276 | dragWidget->setVisible(false); |
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277 | 277 | } |
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278 | 278 | } |
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279 | 279 | |
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280 | 280 | auto canMerge = impl->allowMergeForMimeData(event->mimeData()); |
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281 | 281 | auto canInsert = impl->allowInsertForMimeData(event->mimeData()); |
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282 | 282 | if (!impl->findPlaceHolderPosition(event->pos(), event->mimeData(), canInsert, canMerge, |
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283 | 283 | this)) { |
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284 | 284 | event->ignore(); |
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285 | 285 | } |
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286 | 286 | } |
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287 | 287 | else { |
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288 | 288 | // do nothing |
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289 | 289 | } |
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290 | 290 | } |
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291 | 291 | else { |
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292 | 292 | event->ignore(); |
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293 | 293 | } |
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294 | 294 | |
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295 | 295 | QWidget::dragEnterEvent(event); |
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296 | 296 | } |
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297 | 297 | |
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298 | 298 | void VisualizationDragDropContainer::dragLeaveEvent(QDragLeaveEvent *event) |
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299 | 299 | { |
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300 | 300 | Q_UNUSED(event); |
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301 | 301 | |
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302 | 302 | auto &helper = sqpApp->dragDropGuiController(); |
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303 | 303 | |
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304 | 304 | if (!impl->cursorIsInContainer(this)) { |
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305 | 305 | helper.removePlaceHolder(); |
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306 | 306 | helper.setHightlightedDragWidget(nullptr); |
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307 | 307 | impl->m_MinContainerHeight = 0; |
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308 | 308 | |
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309 | 309 | auto dragWidget = helper.getCurrentDragWidget(); |
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310 | 310 | if (dragWidget) { |
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311 | 311 | // dragWidget has a value only if the drag is started from the visualization |
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312 | 312 | // In that case, shows the drag widget at its original place |
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313 | 313 | // So the drag widget doesn't stay hidden if the drop occurs outside the visualization |
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314 | 314 | // drop zone (It is not possible to catch a drop event outside of the application) |
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315 | 315 | |
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316 | 316 | if (dragWidget) { |
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317 | 317 | dragWidget->setVisible(true); |
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318 | 318 | } |
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319 | 319 | } |
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320 | 320 | } |
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321 | 321 | else { |
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322 | 322 | // Leave event probably received for a child widget. |
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323 | 323 | // Do nothing. |
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324 | 324 | // Note: The DragLeave event, doesn't have any mean to determine who sent it. |
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325 | 325 | } |
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326 | 326 | |
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327 | 327 | QWidget::dragLeaveEvent(event); |
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328 | 328 | } |
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329 | 329 | |
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330 | 330 | void VisualizationDragDropContainer::dragMoveEvent(QDragMoveEvent *event) |
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331 | 331 | { |
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332 | 332 | if (impl->acceptMimeData(event->mimeData())) { |
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333 | 333 | auto canMerge = impl->allowMergeForMimeData(event->mimeData()); |
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334 | 334 | auto canInsert = impl->allowInsertForMimeData(event->mimeData()); |
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335 | 335 | impl->findPlaceHolderPosition(event->pos(), event->mimeData(), canInsert, canMerge, this); |
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336 | 336 | } |
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337 | 337 | else { |
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338 | 338 | event->ignore(); |
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339 | 339 | } |
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340 | 340 | |
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341 | 341 | QWidget::dragMoveEvent(event); |
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342 | 342 | } |
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343 | 343 | |
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344 | 344 | void VisualizationDragDropContainer::dropEvent(QDropEvent *event) |
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345 | 345 | { |
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346 | 346 | auto &helper = sqpApp->dragDropGuiController(); |
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347 | 347 | |
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348 | 348 | if (impl->acceptMimeData(event->mimeData())) { |
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349 | 349 | auto dragWidget = helper.getCurrentDragWidget(); |
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350 | 350 | if (impl->hasPlaceHolder()) { |
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351 | 351 | // drop where the placeHolder is located |
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352 | 352 | |
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353 | 353 | auto canInsert = impl->allowInsertForMimeData(event->mimeData()); |
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354 | 354 | if (canInsert) { |
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355 | 355 | auto droppedIndex = impl->m_Layout->indexOf(&helper.placeHolder()); |
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356 | 356 | |
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357 | 357 | if (dragWidget) { |
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358 | 358 | auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget); |
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359 | 359 | if (dragWidgetIndex >= 0 && dragWidgetIndex < droppedIndex) { |
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360 | 360 | // Correction of the index if the drop occurs in the same container |
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361 | 361 | // and if the drag is started from the visualization (in that case, the |
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362 | 362 | // dragWidget is hidden) |
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363 | 363 | droppedIndex -= 1; |
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364 | 364 | } |
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365 | 365 | |
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366 | 366 | dragWidget->setVisible(true); |
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367 | 367 | } |
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368 | 368 | |
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369 | 369 | event->acceptProposedAction(); |
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370 | 370 | |
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371 | 371 | helper.removePlaceHolder(); |
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372 | 372 | |
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373 | 373 | emit dropOccuredInContainer(droppedIndex, event->mimeData()); |
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374 | 374 | } |
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375 | 375 | else { |
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376 | 376 | qCWarning(LOG_VisualizationDragDropContainer()) << tr( |
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377 | 377 | "VisualizationDragDropContainer::dropEvent, dropping on the placeHolder, but " |
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378 | 378 | "the insertion is forbidden."); |
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379 | 379 | Q_ASSERT(false); |
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380 | 380 | } |
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381 | 381 | } |
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382 | 382 | else if (helper.getHightlightedDragWidget()) { |
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383 | 383 | // drop on the highlighted widget |
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384 | 384 | |
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385 | 385 | auto canMerge = impl->allowMergeForMimeData(event->mimeData()); |
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386 | 386 | if (canMerge) { |
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387 | 387 | event->acceptProposedAction(); |
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388 | 388 | emit dropOccuredOnWidget(helper.getHightlightedDragWidget(), event->mimeData()); |
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389 | 389 | } |
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390 | 390 | else { |
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391 | 391 | qCWarning(LOG_VisualizationDragDropContainer()) |
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392 | 392 | << tr("VisualizationDragDropContainer::dropEvent, dropping on a widget, but " |
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393 | 393 | "the merge is forbidden."); |
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394 | 394 | Q_ASSERT(false); |
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395 | 395 | } |
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396 | 396 | } |
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397 | 397 | } |
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398 | 398 | else { |
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399 | 399 | event->ignore(); |
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400 | 400 | } |
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401 | 401 | |
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402 | 402 | sqpApp->dragDropGuiController().setHightlightedDragWidget(nullptr); |
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403 | 403 | impl->m_MinContainerHeight = 0; |
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404 | 404 | |
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405 | 405 | QWidget::dropEvent(event); |
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406 | 406 | } |
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407 | 407 | |
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408 | 408 | |
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409 | 409 | bool VisualizationDragDropContainer::VisualizationDragDropContainerPrivate::findPlaceHolderPosition( |
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410 | 410 | const QPoint &pos, const QMimeData *mimeData, bool canInsert, bool canMerge, |
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411 | 411 | const VisualizationDragDropContainer *container) |
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412 | 412 | { |
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413 | 413 | auto &helper = sqpApp->dragDropGuiController(); |
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414 | 414 | |
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415 | 415 | auto absPos = container->mapToGlobal(pos); |
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416 | 416 | auto isOnPlaceHolder = helper.placeHolder().isAncestorOf(sqpApp->widgetAt(absPos)); |
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417 | 417 | |
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418 | 418 | if (countDragWidget(container, true) == 0) { |
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419 | 419 | // Drop on an empty container, just add the placeHolder at the top |
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420 | 420 | helper.insertPlaceHolder(m_Layout, 0, m_PlaceHolderType, m_PlaceHolderText); |
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421 | 421 | } |
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422 | 422 | else if (!isOnPlaceHolder) { |
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423 | 423 | auto nbDragWidget = countDragWidget(container); |
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424 | 424 | if (nbDragWidget > 0) { |
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425 | 425 | |
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426 | 426 | if (m_MinContainerHeight == 0) { |
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427 | 427 | m_MinContainerHeight = container->size().height(); |
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428 | 428 | } |
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429 | 429 | |
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430 | 430 | m_MinContainerHeight = qMin(m_MinContainerHeight, container->size().height()); |
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431 | 431 | auto graphHeight = qMax(m_MinContainerHeight / nbDragWidget, GRAPH_MINIMUM_HEIGHT); |
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432 | 432 | |
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433 | 433 | auto posY = pos.y(); |
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434 | 434 | auto dropIndex = floor(posY / graphHeight); |
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435 | 435 | auto zoneSize = qMin(graphHeight / 4.0, 75.0); |
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436 | 436 | |
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437 | 437 | |
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438 | 438 | auto isOnTop = posY < dropIndex * graphHeight + zoneSize; |
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439 | 439 | auto isOnBottom = posY > (dropIndex + 1) * graphHeight - zoneSize; |
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440 | 440 | |
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441 | 441 | auto placeHolderIndex = m_Layout->indexOf(&(helper.placeHolder())); |
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442 | 442 | |
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443 | 443 | auto dragWidgetHovered = getChildDragWidgetAt(container, pos); |
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444 | 444 | |
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445 | if (canInsert && (isOnTop || isOnBottom || !canMerge)) { | |
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446 | if (isOnBottom) { | |
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445 | auto acceptMerge = m_AcceptDragWidgetFun(dragWidgetHovered, mimeData); | |
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446 | ||
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447 | if (canInsert && (isOnTop || isOnBottom || !canMerge || !acceptMerge)) { | |
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448 | if (posY > (dropIndex + 1) * graphHeight - graphHeight / 2.0) { | |
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447 | 449 | dropIndex += 1; |
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448 | 450 | } |
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449 | 451 | |
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450 | 452 | if (helper.getCurrentDragWidget()) { |
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451 | 453 | auto dragWidgetIndex = m_Layout->indexOf(helper.getCurrentDragWidget()); |
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452 | 454 | if (dragWidgetIndex >= 0 && dragWidgetIndex <= dropIndex) { |
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453 | 455 | // Correction of the index if the drop occurs in the same container |
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454 | 456 | // and if the drag is started from the visualization (in that case, the |
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455 | 457 | // dragWidget is hidden) |
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456 | 458 | dropIndex += 1; |
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457 | 459 | } |
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458 | 460 | } |
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459 | 461 | |
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460 | 462 | if (dropIndex != placeHolderIndex) { |
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461 | 463 | helper.insertPlaceHolder(m_Layout, dropIndex, m_PlaceHolderType, |
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462 | 464 | m_PlaceHolderText); |
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463 | 465 | } |
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464 | 466 | |
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465 | 467 | helper.setHightlightedDragWidget(nullptr); |
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466 | 468 | } |
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467 | 469 | else if (canMerge && dragWidgetHovered) { |
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468 | 470 | // drop on the middle -> merge |
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469 | 471 | if (hasPlaceHolder()) { |
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470 | 472 | helper.removePlaceHolder(); |
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471 | 473 | } |
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472 | 474 | |
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473 |
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474 | helper.setHightlightedDragWidget(dragWidgetHovered); | |
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475 | return true; | |
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476 | } | |
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477 | else { | |
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478 | return false; | |
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479 | } | |
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475 | helper.setHightlightedDragWidget(dragWidgetHovered); | |
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480 | 476 | } |
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481 | 477 | else { |
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482 | 478 | qCWarning(LOG_VisualizationDragDropContainer()) |
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483 | 479 | << tr("VisualizationDragDropContainer::findPlaceHolderPosition, no valid drop " |
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484 | 480 | "action."); |
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485 | 481 | } |
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486 | 482 | } |
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487 | 483 | else { |
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488 | 484 | qCWarning(LOG_VisualizationDragDropContainer()) |
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489 | 485 | << tr("VisualizationDragDropContainer::findPlaceHolderPosition, no widget " |
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490 | 486 | "found in the " |
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491 | 487 | "container"); |
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492 | 488 | } |
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493 | 489 | } |
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494 | 490 | else { |
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495 | 491 | // the mouse is hover the placeHolder |
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496 | 492 | // Do nothing |
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497 | 493 | } |
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498 | 494 | |
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499 | 495 | return true; |
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500 | 496 | } |
General Comments 4
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