forked from qt-creator/qt-creator
Add qmlinspector plugin.
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Bea Lam
264
src/plugins/qmlinspector/components/expressionquerywidget.cpp
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264
src/plugins/qmlinspector/components/expressionquerywidget.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) 2009 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include "expressionquerywidget.h"
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#include <QtCore/qdebug.h>
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#include <QtGui/qlabel.h>
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#include <QtGui/qtextedit.h>
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#include <QtGui/qlineedit.h>
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#include <QtGui/qpushbutton.h>
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#include <QtGui/qevent.h>
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#include <QtGui/qgroupbox.h>
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#include <QtGui/qtextobject.h>
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#include <QtGui/qlayout.h>
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ExpressionQueryWidget::ExpressionQueryWidget(Mode mode, QmlEngineDebug *client, QWidget *parent)
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: QWidget(parent),
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m_mode(mode),
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m_client(client),
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m_query(0),
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m_textEdit(new QTextEdit),
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m_lineEdit(0)
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{
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m_prompt = QLatin1String(">> ");
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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_textEdit);
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updateTitle();
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if (m_mode == SeparateEntryMode) {
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m_lineEdit = new QLineEdit;
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connect(m_lineEdit, SIGNAL(returnPressed()), SLOT(executeExpression()));
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QHBoxLayout *hbox = new QHBoxLayout;
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hbox->setMargin(5);
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hbox->setSpacing(5);
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hbox->addWidget(new QLabel(tr("Expression:")));
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hbox->addWidget(m_lineEdit);
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layout->addLayout(hbox);
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m_textEdit->setReadOnly(true);
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m_lineEdit->installEventFilter(this);
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} else {
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m_textEdit->installEventFilter(this);
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appendPrompt();
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}
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}
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void ExpressionQueryWidget::setEngineDebug(QmlEngineDebug *client)
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{
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m_client = client;
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}
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void ExpressionQueryWidget::clear()
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{
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m_textEdit->clear();
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if (m_lineEdit)
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m_lineEdit->clear();
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if (m_mode == ShellMode)
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appendPrompt();
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}
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void ExpressionQueryWidget::updateTitle()
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{
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if (m_currObject.debugId() < 0) {
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m_title = tr("Expression queries");
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} else {
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QString desc = QLatin1String("<")
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+ m_currObject.className() + QLatin1String(": ")
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+ (m_currObject.name().isEmpty() ? QLatin1String("<unnamed>") : m_currObject.name())
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+ QLatin1String(">");
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m_title = tr("Expression queries (using context for %1)" , "Selected object").arg(desc);
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}
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}
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void ExpressionQueryWidget::appendPrompt()
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{
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m_textEdit->moveCursor(QTextCursor::End);
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if (m_mode == SeparateEntryMode) {
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m_textEdit->insertPlainText("\n");
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} else {
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m_textEdit->setTextColor(Qt::gray);
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m_textEdit->append(m_prompt);
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}
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}
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void ExpressionQueryWidget::setCurrentObject(const QmlDebugObjectReference &obj)
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{
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m_currObject = obj;
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updateTitle();
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}
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void ExpressionQueryWidget::checkCurrentContext()
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{
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m_textEdit->moveCursor(QTextCursor::End);
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if (m_currObject.debugId() != -1 && m_currObject.debugId() != m_objectAtLastFocus.debugId())
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showCurrentContext();
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m_objectAtLastFocus = m_currObject;
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}
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void ExpressionQueryWidget::showCurrentContext()
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{
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if (m_mode == ShellMode) {
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// clear the initial prompt
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if (m_textEdit->document()->lineCount() == 1)
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m_textEdit->clear();
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}
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m_textEdit->moveCursor(QTextCursor::End);
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m_textEdit->setTextColor(Qt::darkGreen);
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m_textEdit->append(m_currObject.className()
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+ QLatin1String(": ")
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+ (m_currObject.name().isEmpty() ? QLatin1String("<unnamed object>") : m_currObject.name()));
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appendPrompt();
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}
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void ExpressionQueryWidget::executeExpression()
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{
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if (!m_client)
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return;
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if (m_mode == SeparateEntryMode)
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m_expr = m_lineEdit->text().trimmed();
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else
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m_expr = m_expr.trimmed();
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if (!m_expr.isEmpty() && m_currObject.debugId() != -1) {
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if (m_query)
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delete m_query;
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m_query = m_client->queryExpressionResult(m_currObject.debugId(), m_expr, this);
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if (!m_query->isWaiting())
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showResult();
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else
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QObject::connect(m_query, SIGNAL(stateChanged(QmlDebugQuery::State)),
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this, SLOT(showResult()));
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m_lastExpr = m_expr;
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if (m_lineEdit)
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m_lineEdit->clear();
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}
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}
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void ExpressionQueryWidget::showResult()
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{
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if (m_query) {
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m_textEdit->moveCursor(QTextCursor::End);
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QVariant value = m_query->result();
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QString result;
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if (value.type() == QVariant::List || value.type() == QVariant::StringList) {
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result = tr("<%1 items>", "%1 = number of items").arg(value.toList().count());
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} else if (value.isNull()) {
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result = QLatin1String("<no value>");
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} else {
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result = value.toString();
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}
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if (m_mode == SeparateEntryMode) {
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m_textEdit->setTextColor(Qt::black);
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m_textEdit->setFontWeight(QFont::Bold);
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m_textEdit->insertPlainText(m_expr + " : ");
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m_textEdit->setFontWeight(QFont::Normal);
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m_textEdit->insertPlainText(result);
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} else {
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m_textEdit->setTextColor(Qt::darkGreen);
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m_textEdit->insertPlainText(" => ");
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m_textEdit->setTextColor(Qt::black);
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m_textEdit->insertPlainText(result);
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}
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appendPrompt();
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m_expr.clear();
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}
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}
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bool ExpressionQueryWidget::eventFilter(QObject *obj, QEvent *event)
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{
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if (obj == m_textEdit) {
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switch (event->type()) {
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case QEvent::KeyPress:
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{
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QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
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int key = keyEvent->key();
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if (key == Qt::Key_Return || key == Qt::Key_Enter) {
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executeExpression();
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return true;
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} else if (key == Qt::Key_Backspace) {
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// ensure m_expr doesn't contain backspace characters
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QTextCursor cursor = m_textEdit->textCursor();
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bool atLastLine = !(cursor.block().next().isValid());
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if (!atLastLine)
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return true;
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if (cursor.columnNumber() <= m_prompt.count())
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return true;
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cursor.deletePreviousChar();
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m_expr = cursor.block().text().mid(m_prompt.count());
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return true;
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} else {
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m_textEdit->moveCursor(QTextCursor::End);
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m_textEdit->setTextColor(Qt::black);
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m_expr += keyEvent->text();
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}
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break;
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}
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case QEvent::FocusIn:
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checkCurrentContext();
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m_textEdit->moveCursor(QTextCursor::End);
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break;
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default:
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break;
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}
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} else if (obj == m_lineEdit) {
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switch (event->type()) {
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case QEvent::KeyPress:
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{
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QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
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int key = keyEvent->key();
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if (key == Qt::Key_Up && m_lineEdit->text() != m_lastExpr) {
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m_expr = m_lineEdit->text();
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if (!m_lastExpr.isEmpty())
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m_lineEdit->setText(m_lastExpr);
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} else if (key == Qt::Key_Down) {
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m_lineEdit->setText(m_expr);
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}
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break;
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}
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case QEvent::FocusIn:
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checkCurrentContext();
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break;
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default:
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break;
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}
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}
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return QWidget::eventFilter(obj, event);
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}
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