forked from qt-creator/qt-creator
New code assist API
This is a re-work of our completion engine. Primary goals are: - Allow the computation to run in a separate thread so the GUI is not locked. - Support a model-based approach. QStrings are still needed (filtering, etc), but internal structures are free to use more efficient representations. - Unifiy all kinds of *assist* into a more reusable and extensible framework. - Remove unnecessary dependencies on the text editor so we have more generic and easily "plugable" components (still things to be resolved).
This commit is contained in:
Leandro Melo
576
src/plugins/texteditor/codeassist/genericproposalwidget.cpp
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576
src/plugins/texteditor/codeassist/genericproposalwidget.cpp
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@@ -0,0 +1,576 @@
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/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (info@qt.nokia.com)
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**
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**
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** GNU Lesser General Public License Usage
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**
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this file.
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** Please review the following information to ensure the GNU Lesser General
|
||||
** Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** Other Usage
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**
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at info@qt.nokia.com.
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**
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**************************************************************************/
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#include "genericproposalwidget.h"
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#include "iassistprovider.h"
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#include "igenericproposalmodel.h"
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#include "iassistproposalitem.h"
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#include "genericproposal.h"
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#include "codeassistant.h"
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#include <texteditor/texteditorsettings.h>
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#include <texteditor/completionsettings.h>
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#include <utils/faketooltip.h>
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#include <QtCore/QRect>
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#include <QtCore/QLatin1String>
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#include <QtCore/QAbstractListModel>
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#include <QtCore/QPointer>
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#include <QtCore/QDebug>
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#include <QtCore/QTimer>
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#include <QtGui/QApplication>
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#include <QtGui/QVBoxLayout>
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#include <QtGui/QListView>
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#include <QtGui/QAbstractItemView>
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#include <QtGui/QScrollBar>
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#include <QtGui/QKeyEvent>
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#include <QtGui/QDesktopWidget>
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#include <QtGui/QLabel>
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namespace TextEditor {
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// ------------
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// ModelAdapter
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// ------------
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class ModelAdapter : public QAbstractListModel
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{
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Q_OBJECT
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public:
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ModelAdapter(IGenericProposalModel *completionModel, QWidget *parent);
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virtual int rowCount(const QModelIndex &) const;
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virtual QVariant data(const QModelIndex &index, int role) const;
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private:
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IGenericProposalModel *m_completionModel;
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};
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ModelAdapter::ModelAdapter(IGenericProposalModel *completionModel, QWidget *parent)
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: QAbstractListModel(parent)
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, m_completionModel(completionModel)
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{}
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int ModelAdapter::rowCount(const QModelIndex &) const
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{
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return m_completionModel->size();
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}
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QVariant ModelAdapter::data(const QModelIndex &index, int role) const
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{
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if (index.row() >= m_completionModel->size())
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return QVariant();
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if (role == Qt::DisplayRole) {
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return m_completionModel->text(index.row());
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} else if (role == Qt::DecorationRole) {
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return m_completionModel->icon(index.row());
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} else if (role == Qt::WhatsThisRole) {
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return m_completionModel->detail(index.row());
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}
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return QVariant();
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}
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// ------------------------
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// GenericProposalInfoFrame
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// ------------------------
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class GenericProposalInfoFrame : public Utils::FakeToolTip
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{
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public:
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GenericProposalInfoFrame(QWidget *parent = 0)
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: Utils::FakeToolTip(parent), m_label(new QLabel(this))
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{
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QVBoxLayout *layout = new QVBoxLayout(this);
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layout->setMargin(0);
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layout->setSpacing(0);
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layout->addWidget(m_label);
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m_label->setForegroundRole(QPalette::ToolTipText);
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m_label->setBackgroundRole(QPalette::ToolTipBase);
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}
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void setText(const QString &text)
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{
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m_label->setText(text);
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}
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private:
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QLabel *m_label;
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};
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// -----------------------
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// GenericProposalListView
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// -----------------------
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class GenericProposalListView : public QListView
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{
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public:
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GenericProposalListView(QWidget *parent) : QListView(parent) {}
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QSize calculateSize() const;
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QPoint infoFramePos() const;
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int rowSelected() const { return currentIndex().row(); }
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bool isFirstRowSelected() const { return rowSelected() == 0; }
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bool isLastRowSelected() const { return rowSelected() == model()->rowCount() - 1; }
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void selectRow(int row) { setCurrentIndex(model()->index(row, 0)); }
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void selectFirstRow() { selectRow(0); }
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void selectLastRow() { selectRow(model()->rowCount() - 1); }
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};
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QSize GenericProposalListView::calculateSize() const
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{
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static const int maxVisibleItems = 10;
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// Determine size by calculating the space of the visible items
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int visibleItems = model()->rowCount();
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if (visibleItems > maxVisibleItems)
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visibleItems = maxVisibleItems;
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const QStyleOptionViewItem &option = viewOptions();
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QSize shint;
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for (int i = 0; i < visibleItems; ++i) {
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QSize tmp = itemDelegate()->sizeHint(option, model()->index(i, 0));
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if (shint.width() < tmp.width())
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shint = tmp;
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}
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shint.rheight() *= visibleItems;
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return shint;
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}
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QPoint GenericProposalListView::infoFramePos() const
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{
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const QRect &r = rectForIndex(currentIndex());
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QPoint p((parentWidget()->mapToGlobal(
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parentWidget()->rect().topRight())).x() + 3,
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mapToGlobal(r.topRight()).y() - verticalOffset()
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);
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return p;
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}
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// ----------------------------
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// GenericProposalWidgetPrivate
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// ----------------------------
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class GenericProposalWidgetPrivate : public QObject
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{
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Q_OBJECT
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public:
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GenericProposalWidgetPrivate(QWidget *completionWidget);
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const QWidget *m_underlyingWidget;
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GenericProposalListView *m_completionListView;
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IGenericProposalModel *m_model;
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QRect m_displayRect;
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bool m_isSynchronized;
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bool m_explicitlySelected;
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AssistReason m_reason;
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bool m_gotContent;
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QPointer<GenericProposalInfoFrame> m_infoFrame;
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QTimer m_infoTimer;
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CodeAssistant *m_assistant;
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public slots:
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void handleActivation(const QModelIndex &modelIndex);
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void maybeShowInfoTip();
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};
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GenericProposalWidgetPrivate::GenericProposalWidgetPrivate(QWidget *completionWidget)
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: m_underlyingWidget(0)
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, m_completionListView(new GenericProposalListView(completionWidget))
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, m_model(0)
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, m_isSynchronized(true)
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, m_explicitlySelected(false)
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, m_gotContent(false)
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, m_assistant(0)
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{
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connect(m_completionListView, SIGNAL(activated(QModelIndex)),
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this, SLOT(handleActivation(QModelIndex)));
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m_infoTimer.setInterval(1000);
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m_infoTimer.setSingleShot(true);
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connect(&m_infoTimer, SIGNAL(timeout()), SLOT(maybeShowInfoTip()));
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}
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void GenericProposalWidgetPrivate::handleActivation(const QModelIndex &modelIndex)
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{
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static_cast<GenericProposalWidget *>
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(m_completionListView->parent())->notifyActivation(modelIndex.row());
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}
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void GenericProposalWidgetPrivate::maybeShowInfoTip()
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{
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const QModelIndex ¤t = m_completionListView->currentIndex();
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if (!current.isValid())
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return;
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const QString &infoTip = current.data(Qt::WhatsThisRole).toString();
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if (infoTip.isEmpty()) {
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delete m_infoFrame.data();
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m_infoTimer.setInterval(200);
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return;
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}
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if (m_infoFrame.isNull())
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m_infoFrame = new GenericProposalInfoFrame(m_completionListView);
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m_infoFrame->move(m_completionListView->infoFramePos());
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m_infoFrame->setText(infoTip);
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m_infoFrame->adjustSize();
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m_infoFrame->show();
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m_infoFrame->raise();
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m_infoTimer.setInterval(0);
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}
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// ------------------------
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// GenericProposalWidget
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// ------------------------
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GenericProposalWidget::GenericProposalWidget()
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: m_d(new GenericProposalWidgetPrivate(this))
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{
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#ifdef Q_WS_MAC
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if (m_d->m_completionListView->horizontalScrollBar())
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m_d->m_completionListView->horizontalScrollBar()->setAttribute(Qt::WA_MacMiniSize);
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if (m_d->m_completionListView->verticalScrollBar())
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m_d->m_completionListView->verticalScrollBar()->setAttribute(Qt::WA_MacMiniSize);
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#else
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// This improves the look with QGTKStyle.
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setFrameStyle(m_d->m_completionListView->frameStyle());
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#endif
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m_d->m_completionListView->setFrameStyle(QFrame::NoFrame);
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m_d->m_completionListView->setAttribute(Qt::WA_MacShowFocusRect, false);
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m_d->m_completionListView->setUniformItemSizes(true);
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m_d->m_completionListView->setSelectionBehavior(QAbstractItemView::SelectItems);
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m_d->m_completionListView->setSelectionMode(QAbstractItemView::SingleSelection);
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m_d->m_completionListView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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m_d->m_completionListView->setMinimumSize(1, 1);
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QVBoxLayout *layout = new QVBoxLayout(this);
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layout->setMargin(0);
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layout->addWidget(m_d->m_completionListView);
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m_d->m_completionListView->installEventFilter(this);
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setObjectName(QLatin1String("m_popupFrame"));
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setMinimumSize(1, 1);
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}
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GenericProposalWidget::~GenericProposalWidget()
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{
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delete m_d->m_model;
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}
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void GenericProposalWidget::setAssistant(CodeAssistant *assistant)
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{
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m_d->m_assistant = assistant;
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}
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void GenericProposalWidget::setReason(AssistReason reason)
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{
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m_d->m_reason = reason;
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}
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void GenericProposalWidget::setUnderlyingWidget(const QWidget *underlyingWidget)
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{
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setFont(underlyingWidget->font());
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m_d->m_underlyingWidget = underlyingWidget;
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}
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void GenericProposalWidget::setModel(IAssistProposalModel *model)
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{
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delete m_d->m_model;
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m_d->m_model = static_cast<IGenericProposalModel *>(model);
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m_d->m_completionListView->setModel(new ModelAdapter(m_d->m_model, m_d->m_completionListView));
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connect(m_d->m_completionListView->selectionModel(),
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SIGNAL(currentChanged(QModelIndex,QModelIndex)),
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&m_d->m_infoTimer,
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SLOT(start()));
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}
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void GenericProposalWidget::setDisplayRect(const QRect &rect)
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{
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m_d->m_displayRect = rect;
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}
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void GenericProposalWidget::setIsSynchronized(bool isSync)
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{
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m_d->m_isSynchronized = isSync;
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}
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void GenericProposalWidget::showProposal(const QString &prefix)
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{
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ensurePolished();
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if (m_d->m_isSynchronized && !prefix.isEmpty())
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m_d->m_gotContent = true;
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m_d->m_model->removeDuplicates();
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if (!updateAndCheck(prefix))
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return;
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show();
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m_d->m_completionListView->setFocus();
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}
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void GenericProposalWidget::updateProposal(const QString &prefix)
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{
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if (!isVisible())
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return;
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updateAndCheck(prefix);
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}
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void GenericProposalWidget::closeProposal()
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{
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abort();
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}
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void GenericProposalWidget::notifyActivation(int index)
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{
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abort();
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emit proposalItemActivated(m_d->m_model->proposalItem(index));
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}
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void GenericProposalWidget::abort()
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{
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if (isVisible())
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close();
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deleteLater();
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}
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bool GenericProposalWidget::updateAndCheck(const QString &prefix)
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{
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// Keep track in the case there has been an explicit selection.
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int preferredItemId = -1;
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if (m_d->m_explicitlySelected)
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preferredItemId =
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m_d->m_model->persistentId(m_d->m_completionListView->currentIndex().row());
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// Filter, sort, etc.
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m_d->m_model->reset();
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if (!prefix.isEmpty())
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m_d->m_model->filter(prefix);
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if (m_d->m_model->size() == 0
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|| (m_d->m_model->size() == 1 && prefix == m_d->m_model->proposalPrefix())) {
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abort();
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return false;
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}
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if (m_d->m_model->isSortable())
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m_d->m_model->sort();
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m_d->m_completionListView->reset();
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// Try to find the previosly explicit selection (if any). If we can find the item set it
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// as the current. Otherwise (it might have been filtered out) select the first row.
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if (m_d->m_explicitlySelected) {
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Q_ASSERT(preferredItemId != -1);
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for (int i = 0; i < m_d->m_model->size(); ++i) {
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if (m_d->m_model->persistentId(i) == preferredItemId) {
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m_d->m_completionListView->selectRow(i);
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break;
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}
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}
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}
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if (!m_d->m_completionListView->currentIndex().isValid()) {
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m_d->m_completionListView->selectFirstRow();
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if (m_d->m_explicitlySelected)
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m_d->m_explicitlySelected = false;
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}
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if (TextEditorSettings::instance()->completionSettings().m_partiallyComplete
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&& m_d->m_reason == ExplicitlyInvoked
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&& m_d->m_gotContent) {
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if (m_d->m_model->size() == 1) {
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IAssistProposalItem *item = m_d->m_model->proposalItem(0);
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if (item->implicitlyApplies()) {
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abort();
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emit proposalItemActivated(item);
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return false;
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}
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}
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if (m_d->m_model->supportsPrefixExpansion()) {
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const QString &proposalPrefix = m_d->m_model->proposalPrefix();
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if (proposalPrefix.length() > prefix.length())
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emit prefixExpanded(proposalPrefix);
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}
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}
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updatePositionAndSize();
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return true;
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}
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void GenericProposalWidget::updatePositionAndSize()
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{
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const QSize &shint = m_d->m_completionListView->calculateSize();
|
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const int fw = frameWidth();
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const int width = shint.width() + fw * 2 + 30;
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const int height = shint.height() + fw * 2;
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// Determine the position, keeping the popup on the screen
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const QDesktopWidget *desktop = QApplication::desktop();
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#ifdef Q_WS_MAC
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const QRect screen = desktop->availableGeometry(desktop->screenNumber(m_d->m_underlyingWidget));
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||||
#else
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const QRect screen = desktop->screenGeometry(desktop->screenNumber(m_d->m_underlyingWidget));
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#endif
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||||
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QPoint pos = m_d->m_displayRect.bottomLeft();
|
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pos.rx() -= 16 + fw; // Space for the icons
|
||||
if (pos.y() + height > screen.bottom())
|
||||
pos.setY(m_d->m_displayRect.top() - height);
|
||||
if (pos.x() + width > screen.right())
|
||||
pos.setX(screen.right() - width);
|
||||
setGeometry(pos.x(), pos.y(), width, height);
|
||||
}
|
||||
|
||||
bool GenericProposalWidget::eventFilter(QObject *o, QEvent *e)
|
||||
{
|
||||
if (e->type() == QEvent::FocusOut) {
|
||||
abort();
|
||||
#if defined(Q_OS_DARWIN) && ! defined(QT_MAC_USE_COCOA)
|
||||
QFocusEvent *fe = static_cast<QFocusEvent *>(e);
|
||||
if (fe->reason() == Qt::OtherFocusReason) {
|
||||
// Qt/carbon workaround
|
||||
// focus out is received before the key press event.
|
||||
if (m_d->m_completionListView->currentIndex().isValid())
|
||||
emit proposalItemActivated(m_d->m_model->proposalItem(
|
||||
m_d->m_completionListView->currentIndex().row()));
|
||||
}
|
||||
#endif
|
||||
if (m_d->m_infoFrame)
|
||||
m_d->m_infoFrame->close();
|
||||
return true;
|
||||
} else if (e->type() == QEvent::ShortcutOverride) {
|
||||
QKeyEvent *ke = static_cast<QKeyEvent *>(e);
|
||||
switch (ke->key()) {
|
||||
case Qt::Key_N:
|
||||
case Qt::Key_P:
|
||||
if (ke->modifiers() == Qt::ControlModifier) {
|
||||
e->accept();
|
||||
return true;
|
||||
}
|
||||
}
|
||||
} else if (e->type() == QEvent::KeyPress) {
|
||||
m_d->m_gotContent = false;
|
||||
QKeyEvent *ke = static_cast<QKeyEvent *>(e);
|
||||
switch (ke->key()) {
|
||||
case Qt::Key_Escape:
|
||||
abort();
|
||||
return true;
|
||||
|
||||
case Qt::Key_N:
|
||||
case Qt::Key_P:
|
||||
// select next/previous completion
|
||||
m_d->m_explicitlySelected = true;
|
||||
if (ke->modifiers() == Qt::ControlModifier) {
|
||||
int change = (ke->key() == Qt::Key_N) ? 1 : -1;
|
||||
int nrows = m_d->m_model->size();
|
||||
int row = m_d->m_completionListView->currentIndex().row();
|
||||
int newRow = (row + change + nrows) % nrows;
|
||||
if (newRow == row + change || !ke->isAutoRepeat())
|
||||
m_d->m_completionListView->selectRow(newRow);
|
||||
return true;
|
||||
}
|
||||
m_d->m_gotContent = true;
|
||||
break;
|
||||
|
||||
case Qt::Key_Tab:
|
||||
case Qt::Key_Return:
|
||||
#if defined(QT_MAC_USE_COCOA) || !defined(Q_OS_DARWIN)
|
||||
abort();
|
||||
if (m_d->m_completionListView->currentIndex().isValid())
|
||||
emit proposalItemActivated(m_d->m_model->proposalItem(
|
||||
m_d->m_completionListView->currentIndex().row()));
|
||||
#endif
|
||||
return true;
|
||||
|
||||
case Qt::Key_Up:
|
||||
m_d->m_explicitlySelected = true;
|
||||
if (!ke->isAutoRepeat() && m_d->m_completionListView->isFirstRowSelected()) {
|
||||
m_d->m_completionListView->selectLastRow();
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
|
||||
case Qt::Key_Down:
|
||||
m_d->m_explicitlySelected = true;
|
||||
if (!ke->isAutoRepeat() && m_d->m_completionListView->isLastRowSelected()) {
|
||||
m_d->m_completionListView->selectFirstRow();
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
|
||||
case Qt::Key_Enter:
|
||||
case Qt::Key_PageDown:
|
||||
case Qt::Key_PageUp:
|
||||
return false;
|
||||
|
||||
case Qt::Key_Right:
|
||||
case Qt::Key_Left:
|
||||
case Qt::Key_Home:
|
||||
case Qt::Key_End:
|
||||
case Qt::Key_Backspace:
|
||||
// We want these navigation keys to work in the editor.
|
||||
break;
|
||||
|
||||
default:
|
||||
// Only forward keys that insert text and refine the completion.
|
||||
if (ke->text().isEmpty())
|
||||
return true;
|
||||
m_d->m_gotContent = true;
|
||||
break;
|
||||
}
|
||||
|
||||
if (ke->text().length() == 1
|
||||
&& m_d->m_completionListView->currentIndex().isValid()
|
||||
&& qApp->focusWidget() == o) {
|
||||
const QChar &typedChar = ke->text().at(0);
|
||||
IAssistProposalItem *item =
|
||||
m_d->m_model->proposalItem(m_d->m_completionListView->currentIndex().row());
|
||||
if (item->prematurelyApplies(typedChar)) {
|
||||
abort();
|
||||
emit proposalItemActivated(item);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
QApplication::sendEvent(const_cast<QWidget *>(m_d->m_underlyingWidget), e);
|
||||
if (isVisible())
|
||||
m_d->m_assistant->notifyChange();
|
||||
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
#include "genericproposalwidget.moc"
|
||||
|
||||
} // TextEditor
|
||||
Reference in New Issue
Block a user