|  | Home · Examples

# Code for Styles Example

    /****************************************************************************
    **
    ** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
    **
    ** This file is part of Qt Jambi.
    **
    ** ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 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 GNU
    ** General Public Licensing requirements will be met:
    ** http://www.trolltech.com/products/qt/opensource.html
    **
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://www.trolltech.com/products/qt/licensing.html or contact the
    ** sales department at sales@trolltech.com.

    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    package com.trolltech.examples;

    import com.trolltech.qt.core.*;
    import com.trolltech.qt.gui.*;

    @QtJambiExample(name = "Styles")
    public class Styles extends QDialog
    {
        private QPalette originalPalette;

        private QLabel styleLabel;
        private QComboBox styleComboBox;
        private QCheckBox useStylePaletteCheckBox;
        private QCheckBox disableWidgetsCheckBox;

        private QGroupBox topLeftGroupBox;
        private QRadioButton radioButton1;
        private QRadioButton radioButton2;
        private QRadioButton radioButton3;
        private QCheckBox checkBox;

        private QGroupBox topRightGroupBox;
        private QPushButton defaultPushButton;
        private QPushButton togglePushButton;
        private QPushButton flatPushButton;

        private QTabWidget bottomLeftTabWidget;
        private QTableWidget tableWidget;
        private QTextEdit textEdit;

        private QGroupBox bottomRightGroupBox;
        private QLineEdit lineEdit;
        private QSpinBox spinBox;
        private QDateTimeEdit dateTimeEdit;
        private QSlider slider;
        private QScrollBar scrollBar;
        private QDial dial;

        private QProgressBar progressBar;

        public Styles()
        {
            originalPalette = QApplication.palette();

            styleComboBox = new QComboBox();
            styleComboBox.addItem("NorwegianWood");
            styleComboBox.addItems(QStyleFactory.keys());

            styleLabel = new QLabel(tr("&Style:"));
            styleLabel.setBuddy(styleComboBox);

            useStylePaletteCheckBox = new QCheckBox(tr("&Use style's standard palette"));
            useStylePaletteCheckBox.setChecked(true);

            disableWidgetsCheckBox = new QCheckBox(tr("&Disable widgets"));

            createTopLeftGroupBox();
            createTopRightGroupBox();
            createBottomLeftTabWidget();
            createBottomRightGroupBox();
            createProgressBar();

            styleComboBox.activated.connect(this, "changeStyle(String)");
            useStylePaletteCheckBox.toggled.connect(this, "changePalette()");
            disableWidgetsCheckBox.toggled.connect(topLeftGroupBox, "setDisabled(boolean)");
            disableWidgetsCheckBox.toggled.connect(topRightGroupBox, "setDisabled(boolean)");
            disableWidgetsCheckBox.toggled.connect(bottomLeftTabWidget, "setDisabled(boolean)");
            disableWidgetsCheckBox.toggled.connect(bottomRightGroupBox, "setDisabled(boolean)");

            QHBoxLayout topLayout = new QHBoxLayout();
            topLayout.addWidget(styleLabel);
            topLayout.addWidget(styleComboBox);
            topLayout.addStretch(1);
            topLayout.addWidget(useStylePaletteCheckBox);
            topLayout.addWidget(disableWidgetsCheckBox);

            QGridLayout mainLayout = new QGridLayout();
            mainLayout.addLayout(topLayout, 0, 0, 1, 2);
            mainLayout.addWidget(topLeftGroupBox, 1, 0);
            mainLayout.addWidget(topRightGroupBox, 1, 1);
            mainLayout.addWidget(bottomLeftTabWidget, 2, 0);
            mainLayout.addWidget(bottomRightGroupBox, 2, 1);
            mainLayout.addWidget(progressBar, 3, 0, 1, 2);
            mainLayout.setRowStretch(1, 1);
            mainLayout.setRowStretch(2, 1);
            mainLayout.setColumnStretch(0, 1);
            mainLayout.setColumnStretch(1, 1);
            setLayout(mainLayout);

            setWindowTitle(tr("Styles"));
            changeStyle("NorwegianWood");
        }

        public void changeStyle(String styleName)
        {
            if (styleName.equals("NorwegianWood")) {
                QApplication.setStyle(new NorwegianWoodStyle());
            } else {
                QApplication.setStyle(QStyleFactory.create(styleName));
            }
            changePalette();
        }

        public void changePalette()
        {
            if (useStylePaletteCheckBox.isChecked())
                QApplication.setPalette(QApplication.style().standardPalette());
            else
                QApplication.setPalette(originalPalette);
        }

        public void advanceProgressBar()
        {
            int curVal = progressBar.value();
            int maxVal = progressBar.maximum();
            progressBar.setValue(curVal + (maxVal - curVal) / 100);
        }

        public void createTopLeftGroupBox()
        {
            topLeftGroupBox = new QGroupBox(tr("Group 1"));

            radioButton1 = new QRadioButton(tr("Radio button 1"));
            radioButton2 = new QRadioButton(tr("Radio button 2"));
            radioButton3 = new QRadioButton(tr("Radio button 3"));
            radioButton1.setChecked(true);

            checkBox = new QCheckBox(tr("Tri-state check box"));
            checkBox.setTristate(true);
            checkBox.setCheckState(Qt.CheckState.PartiallyChecked);

            QVBoxLayout layout = new QVBoxLayout();
            layout.addWidget(radioButton1);
            layout.addWidget(radioButton2);
            layout.addWidget(radioButton3);
            layout.addWidget(checkBox);
            layout.addStretch(1);
            topLeftGroupBox.setLayout(layout);
        }

        private void createTopRightGroupBox()
        {
            topRightGroupBox = new QGroupBox(tr("Group 2"));

            defaultPushButton = new QPushButton(tr("Default Push Button"));
            defaultPushButton.setDefault(true);

            togglePushButton = new QPushButton(tr("Toggle Push Button"));
            togglePushButton.setCheckable(true);
            togglePushButton.setChecked(true);

            flatPushButton = new QPushButton(tr("Flat Push Button"));
            flatPushButton.setFlat(true);

            QVBoxLayout layout = new QVBoxLayout();
            layout.addWidget(defaultPushButton);
            layout.addWidget(togglePushButton);
            layout.addWidget(flatPushButton);
            layout.addStretch(1);
            topRightGroupBox.setLayout(layout);
        }

        private void createBottomLeftTabWidget()
        {
            bottomLeftTabWidget = new QTabWidget();
            bottomLeftTabWidget.setSizePolicy(QSizePolicy.Policy.Preferred,
                                               QSizePolicy.Policy.Ignored);

            QWidget tab1 = new QWidget();
            tableWidget = new QTableWidget(10, 10);

            QHBoxLayout tab1hbox = new QHBoxLayout();
            tab1hbox.setMargin(5);
            tab1hbox.addWidget(tableWidget);
            tab1.setLayout(tab1hbox);

            QWidget tab2 = new QWidget();
            textEdit = new QTextEdit();

            textEdit.setPlainText(tr("Twinkle, twinkle, little star,\n" +
                                      "How I wonder what you are.\n" +
                                      "Up above the world so high,\n" +
                                      "Like a diamond in the sky.\n" +
                                      "Twinkle, twinkle, little star,\n" +
                                      "How I wonder what you are!\n"));

            QHBoxLayout tab2hbox = new QHBoxLayout();
            tab2hbox.setMargin(5);
            tab2hbox.addWidget(textEdit);
            tab2.setLayout(tab2hbox);

            bottomLeftTabWidget.addTab(tab1, tr("&Table"));
            bottomLeftTabWidget.addTab(tab2, tr("Text &Edit"));
        }

        private void createBottomRightGroupBox()
        {
            bottomRightGroupBox = new QGroupBox(tr("Group 3"));
            bottomRightGroupBox.setCheckable(true);
            bottomRightGroupBox.setChecked(true);

            lineEdit = new QLineEdit("s3cRe7");
            lineEdit.setEchoMode(QLineEdit.EchoMode.Password);

            spinBox = new QSpinBox(bottomRightGroupBox);
            spinBox.setValue(50);

            dateTimeEdit = new QDateTimeEdit(bottomRightGroupBox);
            dateTimeEdit.setDateTime(QDateTime.currentDateTime());

            slider = new QSlider(Qt.Orientation.Horizontal, bottomRightGroupBox);
            slider.setValue(40);

            scrollBar = new QScrollBar(Qt.Orientation.Horizontal, bottomRightGroupBox);
            scrollBar.setValue(60);

            dial = new QDial(bottomRightGroupBox);
            dial.setValue(30);
            dial.setNotchesVisible(true);

            QGridLayout layout = new QGridLayout();
            layout.addWidget(lineEdit, 0, 0, 1, 2);
            layout.addWidget(spinBox, 1, 0, 1, 2);
            layout.addWidget(dateTimeEdit, 2, 0, 1, 2);
            layout.addWidget(slider, 3, 0);
            layout.addWidget(scrollBar, 4, 0);
            layout.addWidget(dial, 3, 1, 2, 1);
            layout.setRowStretch(5, 1);
            bottomRightGroupBox.setLayout(layout);
        }

        private void createProgressBar()
        {
            progressBar = new QProgressBar();
            progressBar.setRange(0, 10000);
            progressBar.setValue(0);

            QTimer timer = new QTimer(this);
            timer.timeout.connect(this, "advanceProgressBar()");
            timer.start(1000);
        }

        class NorwegianWoodStyle extends QMotifStyle
        {
            @Override
            public void polish(QPalette palette)
            {
                QColor beige = new QColor(236, 182, 120);
                QColor slightlyOpaqueBlack = new QColor(0, 0, 0, 63);

                QPixmap backgroundImage = new QPixmap("classpath:com/trolltech/examples/images/woodbackground.png");
                QPixmap buttonImage = new QPixmap("classpath:com/trolltech/examples/images/woodbutton.png");

                QPixmap midImage = new QPixmap(buttonImage);

                QPainter painter = new QPainter();
                painter.begin(midImage);
                painter.setPen(Qt.PenStyle.NoPen);
                painter.fillRect(midImage.rect(), new QBrush(slightlyOpaqueBlack));
                painter.end();

                palette.setBrush(QPalette.ColorRole.BrightText, new QBrush(new QColor(Qt.GlobalColor.white)));
                palette.setBrush(QPalette.ColorRole.Base, new QBrush(beige));
                palette.setBrush(QPalette.ColorRole.Highlight, new QBrush(new QColor(Qt.GlobalColor.darkGreen)));
                setTexture(palette, QPalette.ColorRole.Button, buttonImage);
                setTexture(palette, QPalette.ColorRole.Mid, midImage);
                setTexture(palette, QPalette.ColorRole.Window, backgroundImage);

                QBrush brush = palette.window();
                brush.setColor(brush.color().darker());

                palette.setBrush(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Base, brush);
                palette.setBrush(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Button, brush);
                palette.setBrush(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Mid, brush);
            }

            @Override
            public void polish(QWidget widget)
            {
                if (widget instanceof QPushButton
                    || widget instanceof QComboBox)
                    widget.setAttribute(Qt.WidgetAttribute.WA_Hover, true);
            }

            @Override
            public void unpolish(QWidget widget)
            {
                if (widget instanceof QPushButton
                    || widget instanceof QComboBox)
                    widget.setAttribute(Qt.WidgetAttribute.WA_Hover, false);
            }

            @Override
            public int pixelMetric(PixelMetric metric, QStyleOption option,
                                   QWidget widget)
            {
                switch (metric) {
                    case PM_ComboBoxFrameWidth:
                        return 8;
                    case PM_ScrollBarExtent:
                        return super.pixelMetric(metric, option, widget) + 4;
                    default:
                        return super.pixelMetric(metric, option, widget);
                }
            }

            @Override
            public int styleHint(StyleHint hint, QStyleOption option, QWidget widget,
                                 QStyleHintReturn returnData)
            {
                switch (hint) {
                    case SH_DitherDisabledText:
                        return 0;
                    case SH_EtchDisabledText:
                        return 0;
                    default:
                        return super.styleHint(hint, option, widget, returnData);
                }
            }

            @Override
            public void drawPrimitive(QStyle.PrimitiveElement element, QStyleOption option,
                                      QPainter painter, QWidget widget)
            {
                switch (element) {
                    case PE_PanelButtonCommand:
                        int delta = option.state().isSet(StateFlag.State_MouseOver) ? 64 : 0;
                        QColor slightlyOpaqueBlack = new QColor(0, 0, 0, 63);
                        QColor semiTransparentWhite = new QColor(255, 255, 255, 127 + delta);
                        QColor semiTransparentBlack = new QColor(0, 0, 0, 127 - delta);

                        int x, y, width, height;
                        x = option.rect().x();
                        y = option.rect().y();
                        width = option.rect().width();
                        height = option.rect().height();

                        QPainterPath roundRect = roundRectPath(option.rect());
                        int radius = Math.min(width, height) / 2;

                        QBrush brush;
                        boolean darker;

                        if (option instanceof QStyleOptionButton &&
                            ((QStyleOptionButton) option).features().isSet(QStyleOptionButton.ButtonFeature.Flat)) {
                            brush = option.palette().brush(QPalette.ColorRole.Window);
                            darker = option.state().isSet(StateFlag.State_Sunken) || option.state().isSet(StateFlag.State_On);
                        } else {
                            if (option.state().isSet(StateFlag.State_Sunken) || option.state().isSet(StateFlag.State_On)) {
                                brush = option.palette().mid();
                                darker = !option.state().isSet(StateFlag.State_Sunken);
                            } else {
                                brush = option.palette().button();
                                darker = false;
                            }
                        }
                        painter.save();
                        painter.setRenderHint(QPainter.RenderHint.Antialiasing, true);
                        painter.fillPath(roundRect, brush);
                        if (darker)
                            painter.fillPath(roundRect, new QBrush(slightlyOpaqueBlack));

                        int penWidth;
                        if (radius < 10)
                            penWidth = 3;
                        else if (radius < 20)
                            penWidth = 5;
                        else
                            penWidth = 7;

                        QPen topPen = new QPen(semiTransparentWhite, penWidth);
                        QPen bottomPen = new QPen(semiTransparentBlack, penWidth);

                        if (option.state().isSet(StateFlag.State_Sunken) ||
                            option.state().isSet(StateFlag.State_On)) {
                            QPen tmpPen = topPen;
                            topPen = bottomPen;
                            bottomPen = tmpPen;
                        }

                        int x1 = x;
                        int x2 = x + radius;
                        int x3 = x + width - radius;
                        int x4 = x + width;

                        if (option.direction().equals(Qt.LayoutDirection.RightToLeft)) {
                            int tmp;

                            tmp = x1;
                            x1 = x4;
                            x4 = tmp;
                            tmp = x2;
                            x3 = x2;
                            x2 = tmp;
                        }

                        QPolygon topHalf = new QPolygon();
                        topHalf.add(new QPoint(x1, y));
                        topHalf.add(new QPoint(x4, y));
                        topHalf.add(new QPoint(x3, y + radius));
                        topHalf.add(new QPoint(x2, y + height - radius));
                        topHalf.add(new QPoint(x1, y + height));

                        painter.setClipPath(roundRect);
                        painter.setClipRegion(new QRegion(topHalf), Qt.ClipOperation.IntersectClip);
                        painter.setPen(topPen);
                        painter.drawPath(roundRect);

                        QPolygon bottomHalf = new QPolygon(topHalf);
                        bottomHalf.replace(0, new QPoint(x4, y + height));
                        painter.setClipPath(roundRect);
                        painter.setClipRegion(new QRegion(bottomHalf), Qt.ClipOperation.IntersectClip);
                        painter.setPen(bottomPen);
                        painter.drawPath(roundRect);

                        painter.setPen(option.palette().windowText().color());
                        painter.setClipping(false);
                        painter.drawPath(roundRect);

                        painter.restore();
                    break;
                    default:
                        super.drawPrimitive(element, option, painter, widget);
                }
            }

            @Override
            public void drawControl(ControlElement element, QStyleOption option,
                                    QPainter painter, QWidget widget)
            {
                switch (element) {
                case CE_PushButtonLabel:
                        QStyleOptionButton myButtonOption = (QStyleOptionButton) option;

                        if (option instanceof QStyleOptionButton) {
                            if (!myButtonOption.palette().currentColorGroup().equals(QPalette.ColorGroup.Disabled)) {
                                if (myButtonOption.state().isSet(StateFlag.State_Sunken) ||
                                    myButtonOption.state().isSet(StateFlag.State_On)) {
                                    QPalette pal = myButtonOption.palette();
                                    pal.setBrush(QPalette.ColorRole.ButtonText,
                                                 myButtonOption.palette().brightText());
                                    myButtonOption.setPalette(pal);
                                }
                            }
                        }
                        super.drawControl(element, myButtonOption, painter, widget);
                    break;
                default:
                    super.drawControl(element, option, painter, widget);
                }
            }

            private void setTexture(QPalette palette, QPalette.ColorRole role, QPixmap pixmap)
            {
                for (QPalette.ColorGroup cg : QPalette.ColorGroup.values()) {
                    if (cg.value() > 2)
                        continue;

                    QColor color = palette.brush(cg, role).color();
                    palette.setBrush(cg, role, new QBrush(color, pixmap));
                }
            }

            private QPainterPath roundRectPath(QRect rect)
            {
                int radius = Math.min(rect.width(), rect.height()) / 2;
                int diam = 2 * radius;

                int x1, y1, x2, y2;
                x1 = rect.left();
                y1 = rect.top();
                x2 = rect.right();
                y2 = rect.bottom();

                QPainterPath path = new QPainterPath();
                path.moveTo(x2, y1 + radius);
                path.arcTo(new QRectF(x2 - diam, y1, diam, diam), 0.0, +90.0);
                path.lineTo(x1 + radius, y1);
                path.arcTo(new QRectF(x1, y1, diam, diam), 90.0, +90.0);
                path.lineTo(x1, y2 - radius);
                path.arcTo(new QRectF(x1, y2 - diam, diam, diam), 180.0, +90.0);
                path.lineTo(x1 + radius, y2);
                path.arcTo(new QRectF(x2 - diam, y2 - diam, diam, diam), 270.0, +90.0);
                path.closeSubpath();

                return path;
            }
        } // class NorwegianWoodStyle

        public static void main(String args[])
        {
            QApplication.initialize(args);

            new Styles().setVisible(true);

            QApplication.exec();
        }

    }