/****************************************************************************
**
** Copyright (C) 2008 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Script Generator project on Trolltech Labs.
**
** 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.
**
****************************************************************************/

function tr(s) { return s; }


Operation = { NoTransformation: 0, Rotate: 1, Scale: 2, Translate: 3 };


function RenderArea(parent)
{
    QWidget.call(this, parent);

    var newFont = new QFont(this.font);
    newFont.setPixelSize(12);
    this.font = newFont;

    var fontMetrics = new QFontMetrics(newFont);
    this.xBoundingRect = fontMetrics.boundingRect(tr("x"));
    this.yBoundingRect = fontMetrics.boundingRect(tr("y"));
    this.shape = new QPainterPath();
    this.operations = new Array();
}

RenderArea.prototype = new QWidget();

RenderArea.prototype.setOperations = function(operations)
{
    this.operations = operations;
    this.update();
}

RenderArea.prototype.setShape = function(shape)
{
    this.shape = shape;
    this.update();
}

RenderArea.prototype.getMinimumSizeHint = function()
{
    return new QSize(182, 182);
}

RenderArea.prototype.getSizeHint = function()
{
    return new QSize(232, 232);
}

RenderArea.prototype.paintEvent = function(event)
{
    var painter = new QPainter();
    painter.begin(this);
    painter.setRenderHint(QPainter.Antialiasing);
    painter.fillRect(event.rect(), new QBrush(new QColor(Qt.white)));

    painter.translate(66, 66);

    painter.save();
    this.transformPainter(painter);
    this.drawShape(painter);
    painter.restore();

    this.drawOutline(painter);

    this.transformPainter(painter);
    this.drawCoordinates(painter);

    painter.end();
}

RenderArea.prototype.drawCoordinates = function(painter)
{
    painter.setPen(new QColor(Qt.red));

    painter.drawLine(0, 0, 50, 0);
    painter.drawLine(48, -2, 50, 0);
    painter.drawLine(48, 2, 50, 0);
    painter.drawText(60 - this.xBoundingRect.width() / 2,
                     0 + this.xBoundingRect.height() / 2, tr("x"));

    painter.drawLine(0, 0, 0, 50);
    painter.drawLine(-2, 48, 0, 50);
    painter.drawLine(2, 48, 0, 50);
    painter.drawText(0 - this.yBoundingRect.width() / 2,
                     60 + this.yBoundingRect.height() / 2, tr("y"));
}

RenderArea.prototype.drawOutline = function(painter)
{
    painter.setPen(new QPen(new QColor(Qt.darkGreen)));
    painter.setPen(new QPen(Qt.DashLine));
    painter.setBrush(new QBrush(Qt.NoBrush));
    painter.drawRect(0, 0, 100, 100);
}

RenderArea.prototype.drawShape = function(painter)
{
    painter.fillPath(this.shape, new QColor(Qt.blue));
}

RenderArea.prototype.transformPainter = function(painter)
{
    for (var i = 0; i < this.operations.length; ++i) {
        switch (this.operations[i]) {
        case Operation.Translate:
            painter.translate(50, 50);
            break;
        case Operation.Scale:
            painter.scale(0.75, 0.75);
            break;
        case Operation.Rotate:
            painter.rotate(60);
            break;
        case Operation.NoTransformation:
        default:
            ;
        }
    }
}



function Window(parent)
{
    QWidget.call(this, parent);

    this.originalRenderArea = new RenderArea();

    this.shapeComboBox = new QComboBox();
    this.shapeComboBox.addItem(tr("Clock"));
    this.shapeComboBox.addItem(tr("House"));
    this.shapeComboBox.addItem(tr("Text"));
    this.shapeComboBox.addItem(tr("Truck"));

    var layout = new QGridLayout();
    layout.addWidget(this.originalRenderArea, 0, 0);
    layout.addWidget(this.shapeComboBox, 1, 0);

    this.transformedRenderAreas = new Array(Window.NumTransformedAreas);
    this.operationComboBoxes = new Array(Window.NumTransformedAreas);
    for (var i = 0; i < Window.NumTransformedAreas; ++i) {
        this.transformedRenderAreas[i] = new RenderArea();

        this.operationComboBoxes[i] = new QComboBox;
        this.operationComboBoxes[i].addItem(tr("No transformation"));
        this.operationComboBoxes[i].addItem(tr("Rotate by 60\xB0"));
        this.operationComboBoxes[i].addItem(tr("Scale to 75%"));
        this.operationComboBoxes[i].addItem(tr("Translate by (50, 50)"));

        this.operationComboBoxes[i]["activated(int)"].connect(
            this, this.operationChanged);

        layout.addWidget(this.transformedRenderAreas[i], 0, i + 1);
        layout.addWidget(this.operationComboBoxes[i], 1, i + 1);
    }

    this.setLayout(layout);
    this.setupShapes();
    this.shapeSelected(0);

    this.windowTitle = tr("Transformations");
}

Window.prototype = new QWidget();

Window.NumTransformedAreas = 3;

Window.prototype.setupShapes = function()
{
    var truck = new QPainterPath();
    truck.setFillRule(Qt.WindingFill);
    truck.moveTo(0.0, 87.0);
    truck.lineTo(0.0, 60.0);
    truck.lineTo(10.0, 60.0);
    truck.lineTo(35.0, 35.0);
    truck.lineTo(100.0, 35.0);
    truck.lineTo(100.0, 87.0);
    truck.lineTo(0.0, 87.0);
    truck.moveTo(17.0, 60.0);
    truck.lineTo(55.0, 60.0);
    truck.lineTo(55.0, 40.0);
    truck.lineTo(37.0, 40.0);
    truck.lineTo(17.0, 60.0);
    truck.addEllipse(17.0, 75.0, 25.0, 25.0);
    truck.addEllipse(63.0, 75.0, 25.0, 25.0);

    var clock = new QPainterPath();
    clock.addEllipse(-50.0, -50.0, 100.0, 100.0);
    clock.addEllipse(-48.0, -48.0, 96.0, 96.0);
    clock.moveTo(0.0, 0.0);
    clock.lineTo(-2.0, -2.0);
    clock.lineTo(0.0, -42.0);
    clock.lineTo(2.0, -2.0);
    clock.lineTo(0.0, 0.0);
    clock.moveTo(0.0, 0.0);
    clock.lineTo(2.732, -0.732);
    clock.lineTo(24.495, 14.142);
    clock.lineTo(0.732, 2.732);
    clock.lineTo(0.0, 0.0);

    var house = new QPainterPath();
    house.moveTo(-45.0, -20.0);
    house.lineTo(0.0, -45.0);
    house.lineTo(45.0, -20.0);
    house.lineTo(45.0, 45.0);
    house.lineTo(-45.0, 45.0);
    house.lineTo(-45.0, -20.0);
    house.addRect(15.0, 5.0, 20.0, 35.0);
    house.addRect(-35.0, -15.0, 25.0, 25.0);

    var text = new QPainterPath();
    font = new QFont();
    font.setPixelSize(50);
    var fontBoundingRect = new QFontMetrics(font).boundingRect(tr("Qt"));
    text.addText(-new QPointF(fontBoundingRect.center()), font, tr("Qt"));

    this.shapes = new Array();
    this.shapes.push(clock);
    this.shapes.push(house);
    this.shapes.push(text);
    this.shapes.push(truck);

    this.shapeComboBox["activated(int)"].connect(
            this, this.shapeSelected);
}

Window.prototype.operationChanged = function()
{
    var operations = new Array();
    for (var i = 0; i < Window.NumTransformedAreas; ++i) {
        var index = this.operationComboBoxes[i].currentIndex;
        operations.push(index);
        this.transformedRenderAreas[i].setOperations(operations.slice());
    }
}

Window.prototype.shapeSelected = function(index)
{
    var shape = this.shapes[index];
    this.originalRenderArea.setShape(shape);
    for (var i = 0; i < Window.NumTransformedAreas; ++i)
        this.transformedRenderAreas[i].setShape(shape);
}

var win = new Window();
win.show();
QCoreApplication.exec();