Mercurial > projects > qtd
view demos/browser/modelmenu.d @ 59:17165763b300
CMake: build QtD tools.
author | SokoL_SD |
---|---|
date | Tue, 19 May 2009 08:30:31 +0000 |
parents | 71b382c10ef6 |
children | 7bfd46c330dc |
line wrap: on
line source
/**************************************************************************** ** ** 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. ** $QT_END_LICENSE$ ** ****************************************************************************/ import QtGui.QMenu import QtCore.QAbstractItemModel; import modelmenu; import QtCore.QAbstractItemModel; import qdebug; // A QMenu that is dynamically populated from a QAbstractItemModel class ModelMenu : public QMenu { Q_OBJECT signals: void activated(const QModelIndex &index); void hovered(const QString &text); public: ModelMenu(QWidget *parent = null) { super(parent); m_maxRows = 7; m_firstSeparator = -1; m_maxWidth = -1; m_hoverRole = 0; m_separatorRole = 0; m_model = 0; connect(this, SIGNAL(aboutToShow()), this, SLOT(aboutToShow())); } void setModel(QAbstractItemModel *model) { m_model = model; } QAbstractItemModel *model() const { return m_model; } void setMaxRows(int max) { m_maxRows = max; } int maxRows() const { return m_maxRows; } void setFirstSeparator(int offset) { m_firstSeparator = offset; } int firstSeparator() const { return m_firstSeparator; } void setRootIndex(const QModelIndex &index) { m_root = index; } QModelIndex rootIndex() const { return m_root; } void setHoverRole(int role) { m_hoverRole = role; } int hoverRole() const { return m_hoverRole; } void setSeparatorRole(int role) { m_separatorRole = role; } int separatorRole() const { return m_separatorRole; } QAction *makeAction(const QIcon &icon, const QString &text, QObject *parent); { QFontMetrics fm(font()); if (-1 == m_maxWidth) m_maxWidth = fm.width(QLatin1Char('m')) * 30; QString 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. virtual bool prePopulated() { return false; } // add any actions after the tree virtual void postPopulated() { } // put all of the children of parent into menu up to max void createMenu(const QModelIndex &parent, int max, QMenu *parentMenu = null, QMenu *menu = null) { if (!menu) { QString title = parent.data().toString(); menu = new QMenu(title, this); QIcon icon = qvariant_cast<QIcon>(parent.data(Qt.DecorationRole)); menu.setIcon(icon); parentMenu.addMenu(menu); QVariant v; v.setValue(parent); menu.menuAction().setData(v); connect(menu, SIGNAL(aboutToShow()), this, SLOT(aboutToShow())); return; } int end = m_model.rowCount(parent); if (max != -1) end = qMin(max, end); connect(menu, SIGNAL(triggered(QAction*)), this, SLOT(triggered(QAction*))); connect(menu, SIGNAL(hovered(QAction*)), this, SLOT(hovered(QAction*))); 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 slots: Q_DECLARE_METATYPE(QModelIndex) void aboutToShow() { if (QMenu *menu = qobject_cast<QMenu*>(sender())) { QVariant v = menu.menuAction().data(); if (v.canConvert<QModelIndex>()) { QModelIndex idx = qvariant_cast<QModelIndex>(v); createMenu(idx, -1, menu, menu); disconnect(menu, SIGNAL(aboutToShow()), this, SLOT(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 = qvariant_cast<QModelIndex>(v); emit activated(idx); } } void hovered(QAction *action) { QVariant v = action.data(); if (v.canConvert<QModelIndex>()) { QModelIndex idx = qvariant_cast<QModelIndex>(v); QString hoveredString = idx.data(m_hoverRole).toString(); if (!hoveredString.isEmpty()) emit hovered(hoveredString); } } private: QAction *makeAction(const QModelIndex &index); { QIcon icon = qvariant_cast<QIcon>(index.data(Qt.DecorationRole)); QAction *action = makeAction(icon, index.data().toString(), this); QVariant v; 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; }