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annotate layout_view.cpp @ 10:877a005c2b42

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Layout designer: WidgetView class, with two types: WidgetViewItem and WidgetViewBox which contains items.
author Goffi <goffi@goffi.org>
date Fri, 26 Aug 2011 15:58:46 +0200
parents 0d7875c26974
children 98485ebbdb86
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1 /*
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2 Bellaciao: a Salut à Toi frontend
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3 Copyright (C) 2011 Jérôme Poisson (goffi@goffi.org)
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU Affero General Public License as published by
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7 the Free Software Foundation, either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU Affero General Public License for more details.
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14
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15 You should have received a copy of the GNU Affero General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18 #include "layout_view.h"
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19 #include <QDebug>
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20
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21 WidgetView::WidgetView(const QString& name)
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22 {
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23 qDebug() << "Contructeur WidgetView";
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24 }
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25
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26 WidgetView::~WidgetView()
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27 {
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28 qDebug() << "Destructeur WidgetView";
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29 }
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30
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31 WidgetViewItem::WidgetViewItem(const QString& name)
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32 : QLabel(name), WidgetView(name)
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33 {
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34 }
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35
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36 WidgetViewBox::WidgetViewBox(const QString& name)
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37 : WidgetView(name)
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38 {
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39 setWidget(new LayoutView(0, HORIZONTAL));
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40 }
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41
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42 LayoutView::LayoutView(QWidget* parent, LayoutDirection direction)
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43 : m_direction(direction)
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44 {
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45 setAcceptDrops(true);
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46 if (m_direction == VERTICAL)
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47 m_layout = new QVBoxLayout;
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48 else
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49 m_layout = new QHBoxLayout;
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50 setLayout(m_layout);
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51 m_layout->addStretch();
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52 setStyleSheet("WidgetViewItem {border: 1px solid black; \
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53 border-radius: 5px; \
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54 text-align: center; \
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55 background-color: white; \
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56 min-height: 20px; \
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57 max-height: 20px; \
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58 margin: 2px; \
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59 }");
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60 }
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61
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62 LayoutView::~LayoutView()
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63 {
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64 }
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65
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66 void LayoutView::setLayoutWidgets(const QHash<QString, LayoutWidget*>& layout_widgets)
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67 {
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68 m_layout_widgets = layout_widgets;
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69 }
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70
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71 void LayoutView::dragEnterEvent (QDragEnterEvent* event )
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72 {
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73 if (event->mimeData()->hasFormat(LAYOUT_WIDGET_MIME))
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74 event->acceptProposedAction();
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75 }
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76
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77 void LayoutView::dragLeaveEvent (QDragLeaveEvent* event )
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78 {
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79 m_loc_hint.setCoords(1,1,0,0); //We make the QRect invalid to hide it
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80 update();
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81 }
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82
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83
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84 void LayoutView::dragMoveEvent (QDragMoveEvent* event )
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85 {
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86 int ref_pos = m_direction == VERTICAL ? event->pos().y() : event->pos().x();
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87 int hint_start = 0;
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88 int pos_start, pos_end;
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89 QList<QWidget*> _children = findChildren<QWidget*>("");
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90
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91 QWidget* wid = 0;
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92
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93 for (m_insert_pos=0; m_insert_pos<layout()->count()-1; m_insert_pos++) {
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94 wid = layout()->itemAt(m_insert_pos)->widget();
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95
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96 if (m_direction == VERTICAL) {
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97 pos_start = wid->geometry().top();
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98 pos_end = wid->geometry().bottom();
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99 }
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100 else {
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101 pos_start = wid->geometry().left();
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102 pos_end = wid->geometry().right();
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103 }
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104
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105 if (pos_end > ref_pos && pos_start < ref_pos) {
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106 //We are inside a widget, we break here
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107 hint_start = pos_end;
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108 m_insert_pos++;
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109 break;
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110 }
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111 else if (pos_start > ref_pos)
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112 //we are too far, we stop
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113 break;
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114
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115 hint_start = pos_end;
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116 }
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117
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118 if (m_direction == VERTICAL)
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119 m_loc_hint.setRect(5, hint_start+1, qMax(5,width()-10), 5);
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120 else
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121 m_loc_hint.setRect(hint_start+1, 5, 5, qMax(5,height()-10));
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122 update();
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123 }
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124
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125 void LayoutView::dropEvent (QDropEvent* event)
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126 {
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127 m_loc_hint.setCoords(1,1,0,0); //We make the QRect invalid to hide it
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128 update();
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129 const QMimeData *data = event->mimeData();
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130 QByteArray encodedData = data->data(LAYOUT_WIDGET_MIME);
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131 QDataStream stream(&encodedData, QIODevice::ReadOnly);
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132 while (!stream.atEnd()) {
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133 QString widget_name;
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134 stream >> widget_name;
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135 addWidget(widget_name);
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136 }
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137 }
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138
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139 void LayoutView::addWidget(const QString& name)
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140 {
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141 LayoutWidget* _widget = m_layout_widgets[name];
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142 WidgetView* _widget_view;
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143 if (name == "Box") {
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144 _widget_view = new WidgetViewBox(name);
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145 }
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146 else {
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147 _widget_view = new WidgetViewItem(name);
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148 reinterpret_cast<WidgetViewItem*>(_widget_view)->setAlignment(Qt::AlignCenter);
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149 }
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150 m_layout->insertWidget(m_insert_pos, reinterpret_cast<QWidget*>(_widget_view), 0, Qt::AlignTop);
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151
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152 }
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153
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154 void LayoutView::paintEvent(QPaintEvent* event)
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155 {
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156 if (m_loc_hint.isValid()) {
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157 QPainter newPainter(this);
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158 newPainter.fillRect(m_loc_hint, Qt::blue);
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159 }
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160 }