|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# mainwindow.cpp Example File
widgets/charactermap/mainwindow.cpp

        /****************************************************************************
        **
        ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the example classes of the Qt Toolkit.
        **
        ** Licensees holding valid Qt Preview licenses may use this file in
        ** accordance with the Qt Preview License Agreement provided with the
        ** Software.
        **
        ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
        ** information about Qt Commercial License Agreements.
        **
        ** Contact info@trolltech.com if any conditions of this licensing are
        ** not clear to you.
        **
        ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        **
        ****************************************************************************/

        #include <QtGui>

        #include "characterwidget.h"
        #include "mainwindow.h"

        MainWindow::MainWindow()
        {
            QWidget *centralWidget = new QWidget;

            QLabel *fontLabel = new QLabel(tr("Font:"));
            fontCombo = new QFontComboBox;
            QLabel *sizeLabel = new QLabel(tr("Size:"));
            sizeCombo = new QComboBox;
            QLabel *styleLabel = new QLabel(tr("Style:"));
            styleCombo = new QComboBox;
            QLabel *fontMergingLabel = new QLabel(tr("Automatic Font Merging:"));
            fontMerging = new QCheckBox;
            fontMerging->setChecked(true);

            scrollArea = new QScrollArea;
            characterWidget = new CharacterWidget;
            scrollArea->setWidget(characterWidget);

            findStyles(fontCombo->currentFont());
            findSizes(fontCombo->currentFont());

            lineEdit = new QLineEdit;
            QPushButton *clipboardButton = new QPushButton(tr("&To clipboard"));

            clipboard = QApplication::clipboard();

            connect(fontCombo, SIGNAL(currentFontChanged(const QFont &)),
                    this, SLOT(findStyles(const QFont &)));
            connect(fontCombo, SIGNAL(currentFontChanged(const QFont &)),
                    this, SLOT(findSizes(const QFont &)));
            connect(fontCombo, SIGNAL(currentFontChanged(const QFont &)),
                    characterWidget, SLOT(updateFont(const QFont &)));
            connect(sizeCombo, SIGNAL(currentIndexChanged(const QString &)),
                    characterWidget, SLOT(updateSize(const QString &)));
            connect(styleCombo, SIGNAL(currentIndexChanged(const QString &)),
                    characterWidget, SLOT(updateStyle(const QString &)));
            connect(characterWidget, SIGNAL(characterSelected(const QString &)),
                    this, SLOT(insertCharacter(const QString &)));
            connect(clipboardButton, SIGNAL(clicked()), this, SLOT(updateClipboard()));
            connect(fontMerging, SIGNAL(toggled(bool)), characterWidget, SLOT(updateFontMerging(bool)));

            QHBoxLayout *controlsLayout = new QHBoxLayout;
            controlsLayout->addWidget(fontLabel);
            controlsLayout->addWidget(fontCombo, 1);
            controlsLayout->addWidget(sizeLabel);
            controlsLayout->addWidget(sizeCombo, 1);
            controlsLayout->addWidget(styleLabel);
            controlsLayout->addWidget(styleCombo, 1);
            controlsLayout->addWidget(fontMergingLabel);
            controlsLayout->addWidget(fontMerging, 1);
            controlsLayout->addStretch(1);

            QHBoxLayout *lineLayout = new QHBoxLayout;
            lineLayout->addWidget(lineEdit, 1);
            lineLayout->addSpacing(12);
            lineLayout->addWidget(clipboardButton);

            QVBoxLayout *centralLayout = new QVBoxLayout;
            centralLayout->addLayout(controlsLayout);
            centralLayout->addWidget(scrollArea, 1);
            centralLayout->addSpacing(4);
            centralLayout->addLayout(lineLayout);
            centralWidget->setLayout(centralLayout);

            setCentralWidget(centralWidget);
            setWindowTitle(tr("Character Map"));
        }

        void MainWindow::findStyles(const QFont &font)
        {
            QFontDatabase fontDatabase;
            QString currentItem = styleCombo->currentText();
            styleCombo->clear();

            QString style;
            foreach (style, fontDatabase.styles(font.family()))
                styleCombo->addItem(style);

            int styleIndex = styleCombo->findText(currentItem);

            if (styleIndex == -1)
                styleCombo->setCurrentIndex(0);
            else
                styleCombo->setCurrentIndex(styleIndex);
        }

        void MainWindow::findSizes(const QFont &font)
        {
            QFontDatabase fontDatabase;
            QString currentSize = sizeCombo->currentText();
            sizeCombo->blockSignals(true);
            sizeCombo->clear();

            int size;
            if(fontDatabase.isSmoothlyScalable(font.family(), fontDatabase.styleString(font))) {
                foreach(size, QFontDatabase::standardSizes()) {
                    sizeCombo->addItem(QVariant(size).toString());
                    sizeCombo->setEditable(true);
                }

            } else {
                foreach(size, fontDatabase.smoothSizes(font.family(), fontDatabase.styleString(font))) {
                    sizeCombo->addItem(QVariant(size).toString());
                    sizeCombo->setEditable(false);
                }
            }

            sizeCombo->blockSignals(false);

            int sizeIndex = sizeCombo->findText(currentSize);

            if(sizeIndex == -1)
                sizeCombo->setCurrentIndex(qMax(0, sizeCombo->count() / 3));
            else
                sizeCombo->setCurrentIndex(sizeIndex);
        }

        void MainWindow::insertCharacter(const QString &character)
        {
            lineEdit->insert(character);
        }

        void MainWindow::updateClipboard()
        {
            clipboard->setText(lineEdit->text(), QClipboard::Clipboard);
            clipboard->setText(lineEdit->text(), QClipboard::Selection);
        }