Mercurial > projects > qtd
view demos/browser/modelmenu.d @ 101:4f909ae70e76
add dynamiclayouts example
author | mandel |
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date | Fri, 29 May 2009 13:25:41 +0000 |
parents | 87bb4e622f9e |
children |
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/**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). ** Contact: Qt Software Information (qt-info@nokia.com) ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain ** additional rights. These rights are described in the Nokia Qt LGPL ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this ** package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** If you are unsure which license is appropriate for your use, please ** contact the sales department at qt-sales@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/ module modelmenu; import qt.gui.QMenu; import qt.core.QAbstractItemModel; import qt.core.QPersistentModelIndex; //import qdebug; // A QMenu that is dynamically populated from a QAbstractItemModel class ModelMenu : public QMenu { mixin Signal!("activated", QModelIndex /*index*/); mixin Signal!("linkHovered", string /*text*/); public: this(QWidget parent = null) { super(parent); m_maxRows = 7; m_firstSeparator = -1; m_maxWidth = -1; m_hoverRole = 0; m_separatorRole = 0; m_model = 0; this.aboutToShow.connect(&this.aboutToShow); } void setModel(QAbstractItemModel model) { m_model = model; } QAbstractItemModel model() { return m_model; } void setMaxRows(int max) { m_maxRows = max; } int maxRows() { return m_maxRows; } void setFirstSeparator(int offset) { m_firstSeparator = offset; } int firstSeparator() { return m_firstSeparator; } void setRootIndex(QModelIndex index) { m_root = index; } QModelIndex rootIndex() { return m_root; } void setHoverRole(int role) { m_hoverRole = role; } int hoverRole() { return m_hoverRole; } void setSeparatorRole(int role) { m_separatorRole = role; } int separatorRole() { return m_separatorRole; } QAction makeAction(QIcon icon, string text, QObject parent) { auto fm = new QFontMetrics(font()); if (-1 == m_maxWidth) m_maxWidth = fm.width(QLatin1Char('m')) * 30; string smallText = fm.elidedText(text, Qt.ElideMiddle, m_maxWidth); return new QAction(icon, smallText, parent); } protected: // add any actions before the tree, return true if any actions are added. bool prePopulated() { return false; } // add any actions after the tree void postPopulated() { } // put all of the children of parent into menu up to max void createMenu(QModelIndex parent, int max, QMenu parentMenu = null, QMenu menu = null) { if (!menu) { string title = parent.data().toString(); menu = new QMenu(title, this); QIcon icon = cast(QIcon) parent.data(Qt.DecorationRole); menu.setIcon(icon); parentMenu.addMenu(menu); auto v = new QVariant; v.setValue(parent); menu.menuAction().setData(v); menu.aboutToShow.connect(&this.aboutToShow); return; } int end = m_model.rowCount(parent); if (max != -1) end = qMin(max, end); menu.triggered.connect(&this.triggered); menu.linkHovered.connect(&this.linkHovered); for (int i = 0; i < end; ++i) { QModelIndex idx = m_model.index(i, 0, parent); if (m_model.hasChildren(idx)) { createMenu(idx, -1, menu); } else { if (m_separatorRole != 0 && idx.data(m_separatorRole).toBool()) addSeparator(); else menu.addAction(makeAction(idx)); } if (menu == this && i == m_firstSeparator - 1) addSeparator(); } } private: void aboutToShow() { if (QMenu menu = cast(QMenu) signalSender()) { QVariant v = menu.menuAction().data(); if (v.canConvert!(QModelIndex)()) { QModelIndex idx = cast(QModelIndex) v; createMenu(idx, -1, menu, menu); menu.aboutToShow.disconnect(&this.aboutToShow); return; } } clear(); if (prePopulated()) addSeparator(); int max = m_maxRows; if (max != -1) max += m_firstSeparator; createMenu(m_root, max, this, this); postPopulated(); } void triggered(QAction action) { QVariant v = action.data(); if (v.canConvert!(QModelIndex)()) { QModelIndex idx = cast(QModelIndex) v; activated.emit(idx); } } void linkHovered(QAction action) { QVariant v = action.data(); if (v.canConvert!(QModelIndex)()) { QModelIndex idx = cast(QModelIndex) v; string hoveredString = idx.data(m_hoverRole).toString(); if (!hoveredString.isEmpty()) linkHovered.emit(hoveredString); } } private: QAction makeAction(QModelIndex index) { QIcon icon = cast(QIcon) index.data(Qt.DecorationRole); QAction action = makeAction(icon, index.data().toString(), this); auto v = new QVariant; v.setValue(index); action.setData(v); return action; } int m_maxRows; int m_firstSeparator; int m_maxWidth; int m_hoverRole; int m_separatorRole; QAbstractItemModel m_model; QPersistentModelIndex m_root; }