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
314
src/plugins/texteditor/codeassist/functionhintproposalwidget.cpp
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314
src/plugins/texteditor/codeassist/functionhintproposalwidget.cpp
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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
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** 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 "functionhintproposalwidget.h"
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#include "ifunctionhintproposalmodel.h"
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#include "codeassistant.h"
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#include <utils/faketooltip.h>
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#include <QtCore/QDebug>
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#include <QtGui/QApplication>
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#include <QtGui/QLabel>
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#include <QtGui/QToolButton>
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#include <QtGui/QHBoxLayout>
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#include <QtGui/QVBoxLayout>
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#include <QtGui/QDesktopWidget>
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#include <QtGui/QKeyEvent>
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#include <QtGui/QShortcutEvent>
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namespace TextEditor {
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// -------------------------
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// HintProposalWidgetPrivate
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// -------------------------
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struct FunctionHintProposalWidgetPrivate
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{
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FunctionHintProposalWidgetPrivate();
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const QWidget *m_underlyingWidget;
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CodeAssistant *m_assistant;
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IFunctionHintProposalModel *m_model;
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Utils::FakeToolTip *m_popupFrame;
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QLabel *m_numberLabel;
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QLabel *m_hintLabel;
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QWidget *m_pager;
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QRect m_displayRect;
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int m_currentHint;
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int m_totalHints;
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int m_currentArgument;
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bool m_escapePressed;
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};
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FunctionHintProposalWidgetPrivate::FunctionHintProposalWidgetPrivate()
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: m_underlyingWidget(0)
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, m_assistant(0)
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, m_model(0)
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, m_popupFrame(new Utils::FakeToolTip)
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, m_numberLabel(new QLabel)
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, m_hintLabel(new QLabel)
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, m_pager(new QWidget)
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, m_currentHint(-1)
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, m_totalHints(0)
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, m_currentArgument(-1)
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, m_escapePressed(false)
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{
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m_hintLabel->setTextFormat(Qt::RichText);
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}
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// ------------------
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// HintProposalWidget
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// ------------------
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FunctionHintProposalWidget::FunctionHintProposalWidget()
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: m_d(new FunctionHintProposalWidgetPrivate)
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{
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QToolButton *downArrow = new QToolButton;
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downArrow->setArrowType(Qt::DownArrow);
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downArrow->setFixedSize(16, 16);
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downArrow->setAutoRaise(true);
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QToolButton *upArrow = new QToolButton;
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upArrow->setArrowType(Qt::UpArrow);
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upArrow->setFixedSize(16, 16);
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upArrow->setAutoRaise(true);
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QHBoxLayout *pagerLayout = new QHBoxLayout(m_d->m_pager);
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pagerLayout->setMargin(0);
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pagerLayout->setSpacing(0);
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pagerLayout->addWidget(upArrow);
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pagerLayout->addWidget(m_d->m_numberLabel);
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pagerLayout->addWidget(downArrow);
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QHBoxLayout *popupLayout = new QHBoxLayout(m_d->m_popupFrame);
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popupLayout->setMargin(0);
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popupLayout->setSpacing(0);
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popupLayout->addWidget(m_d->m_pager);
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popupLayout->addWidget(m_d->m_hintLabel);
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connect(upArrow, SIGNAL(clicked()), SLOT(previousPage()));
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connect(downArrow, SIGNAL(clicked()), SLOT(nextPage()));
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qApp->installEventFilter(this);
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setFocusPolicy(Qt::NoFocus);
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}
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FunctionHintProposalWidget::~FunctionHintProposalWidget()
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{
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delete m_d->m_model;
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}
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void FunctionHintProposalWidget::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 FunctionHintProposalWidget::setReason(AssistReason reason)
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{
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Q_UNUSED(reason);
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}
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void FunctionHintProposalWidget::setUnderlyingWidget(const QWidget *underlyingWidget)
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{
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m_d->m_underlyingWidget = underlyingWidget;
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}
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void FunctionHintProposalWidget::setModel(IAssistProposalModel *model)
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{
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m_d->m_model = static_cast<IFunctionHintProposalModel *>(model);
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}
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void FunctionHintProposalWidget::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 FunctionHintProposalWidget::setIsSynchronized(bool)
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{}
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void FunctionHintProposalWidget::showProposal(const QString &prefix)
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{
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m_d->m_totalHints = m_d->m_model->size();
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if (m_d->m_totalHints == 0) {
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abort();
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return;
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}
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m_d->m_pager->setVisible(m_d->m_totalHints > 1);
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m_d->m_currentHint = 0;
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if (!updateAndCheck(prefix)) {
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abort();
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return;
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}
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m_d->m_popupFrame->show();
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}
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void FunctionHintProposalWidget::updateProposal(const QString &prefix)
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{
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updateAndCheck(prefix);
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}
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void FunctionHintProposalWidget::closeProposal()
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{
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abort();
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}
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void FunctionHintProposalWidget::abort()
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{
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if (m_d->m_popupFrame->isVisible())
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m_d->m_popupFrame->close();
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deleteLater();
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}
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bool FunctionHintProposalWidget::eventFilter(QObject *obj, QEvent *e)
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{
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switch (e->type()) {
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case QEvent::ShortcutOverride:
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if (static_cast<QKeyEvent*>(e)->key() == Qt::Key_Escape) {
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m_d->m_escapePressed = true;
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}
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break;
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case QEvent::KeyPress:
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if (static_cast<QKeyEvent*>(e)->key() == Qt::Key_Escape) {
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m_d->m_escapePressed = true;
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}
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if (m_d->m_model->size() > 1) {
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QKeyEvent *ke = static_cast<QKeyEvent*>(e);
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if (ke->key() == Qt::Key_Up) {
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previousPage();
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return true;
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} else if (ke->key() == Qt::Key_Down) {
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nextPage();
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return true;
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}
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return false;
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}
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break;
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case QEvent::KeyRelease:
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if (static_cast<QKeyEvent*>(e)->key() == Qt::Key_Escape && m_d->m_escapePressed) {
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abort();
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return false;
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}
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m_d->m_assistant->notifyChange();
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break;
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case QEvent::WindowDeactivate:
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case QEvent::FocusOut:
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if (obj != m_d->m_underlyingWidget) {
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break;
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}
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abort();
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break;
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case QEvent::MouseButtonPress:
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case QEvent::MouseButtonRelease:
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case QEvent::MouseButtonDblClick:
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case QEvent::Wheel: {
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QWidget *widget = qobject_cast<QWidget *>(obj);
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if (! (widget == this || isAncestorOf(widget))) {
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abort();
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}
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}
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break;
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default:
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break;
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}
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return false;
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}
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void FunctionHintProposalWidget::nextPage()
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{
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m_d->m_currentHint = (m_d->m_currentHint + 1) % m_d->m_totalHints;
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updateContent();
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}
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void FunctionHintProposalWidget::previousPage()
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{
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if (m_d->m_currentHint == 0)
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m_d->m_currentHint = m_d->m_totalHints - 1;
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else
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--m_d->m_currentHint;
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updateContent();
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}
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bool FunctionHintProposalWidget::updateAndCheck(const QString &prefix)
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{
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const int activeArgument = m_d->m_model->activeArgument(prefix);
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if (activeArgument == -1) {
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abort();
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return false;
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} else if (activeArgument != m_d->m_currentArgument) {
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m_d->m_currentArgument = activeArgument;
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updateContent();
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}
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return true;
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}
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void FunctionHintProposalWidget::updateContent()
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{
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m_d->m_hintLabel->setText(m_d->m_model->text(m_d->m_currentHint));
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m_d->m_numberLabel->setText(tr("%1 of %2").arg(m_d->m_currentHint + 1).arg(m_d->m_totalHints));
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updatePosition();
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}
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void FunctionHintProposalWidget::updatePosition()
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{
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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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m_d->m_pager->setFixedWidth(m_d->m_pager->minimumSizeHint().width());
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m_d->m_hintLabel->setWordWrap(false);
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const int maxDesiredWidth = screen.width() - 10;
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const QSize &minHint = m_d->m_popupFrame->minimumSizeHint();
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if (minHint.width() > maxDesiredWidth) {
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m_d->m_hintLabel->setWordWrap(true);
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m_d->m_popupFrame->setFixedWidth(maxDesiredWidth);
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const int extra = m_d->m_popupFrame->contentsMargins().bottom() +
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m_d->m_popupFrame->contentsMargins().top();
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m_d->m_popupFrame->setFixedHeight(
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m_d->m_hintLabel->heightForWidth(maxDesiredWidth - m_d->m_pager->width()) + extra);
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} else {
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m_d->m_popupFrame->setFixedSize(minHint);
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}
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const QSize &sz = m_d->m_popupFrame->size();
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QPoint pos = m_d->m_displayRect.topLeft();
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pos.setY(pos.y() - sz.height() - 1);
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if (pos.x() + sz.width() > screen.right())
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pos.setX(screen.right() - sz.width());
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m_d->m_popupFrame->move(pos);
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}
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} // TextEditor
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