# HG changeset patch
# User unc0rr
# Date 1291748529 -10800
# Node ID 63a21fac8bf757bdf2bb0b4771e8878dac7cdfa0
# Parent  54e78c40970b21e28d626dd1480763efc88f39c5
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget

diff -r 54e78c40970b -r 63a21fac8bf7 tools/drawMapTest/drawMapTest.pro
--- a/tools/drawMapTest/drawMapTest.pro	Mon Dec 06 21:15:41 2010 -0500
+++ b/tools/drawMapTest/drawMapTest.pro	Tue Dec 07 22:02:09 2010 +0300
@@ -5,7 +5,11 @@
 TEMPLATE = app
 SOURCES += main.cpp \
     mainwindow.cpp \
-    drawmapscene.cpp
+    drawmapscene.cpp \
+    qaspectratiolayout.cpp \
+    drawmapwidget.cpp
 HEADERS += mainwindow.h \
-    drawmapscene.h
+    drawmapscene.h \
+    qaspectratiolayout.h \
+    drawmapwidget.h
 FORMS += mainwindow.ui
diff -r 54e78c40970b -r 63a21fac8bf7 tools/drawMapTest/drawmapwidget.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/drawMapTest/drawmapwidget.cpp	Tue Dec 07 22:02:09 2010 +0300
@@ -0,0 +1,38 @@
+#include "drawmapwidget.h"
+
+DrawMapWidget::DrawMapWidget(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::DrawMapWidget)
+{
+    ui->setupUi(this);
+}
+
+DrawMapWidget::~DrawMapWidget()
+{
+    delete ui;
+}
+
+void DrawMapWidget::changeEvent(QEvent *e)
+{
+    QWidget::changeEvent(e);
+    switch (e->type()) {
+    case QEvent::LanguageChange:
+        ui->retranslateUi(this);
+        break;
+    default:
+        break;
+    }
+}
+
+void DrawMapWidget::setScene(DrawMapScene * scene)
+{
+    ui->graphicsView->setScene(scene);
+}
+
+void DrawMapWidget::resizeEvent(QResizeEvent * event)
+{
+    Q_UNUSED(event);
+
+    if(ui->graphicsView && ui->graphicsView->scene())
+        ui->graphicsView->fitInView(ui->graphicsView->scene()->sceneRect(), Qt::KeepAspectRatio);
+}
diff -r 54e78c40970b -r 63a21fac8bf7 tools/drawMapTest/drawmapwidget.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/drawMapTest/drawmapwidget.h	Tue Dec 07 22:02:09 2010 +0300
@@ -0,0 +1,61 @@
+#ifndef DRAWMAPWIDGET_H
+#define DRAWMAPWIDGET_H
+
+#include <QWidget>
+#include <QHBoxLayout>
+#include <QPushButton>
+#include <QGraphicsView>
+#include <QApplication>
+
+#include "qaspectratiolayout.h"
+#include "drawmapscene.h"
+
+namespace Ui {
+    class Ui_DrawMapWidget
+    {
+    public:
+        QGraphicsView *graphicsView;
+        QPushButton *pbUndo;
+
+        void setupUi(QWidget *drawMapWidget)
+        {
+            QAspectRatioLayout * arLayout = new QAspectRatioLayout(drawMapWidget);
+            arLayout->setMargin(0);
+
+            graphicsView = new QGraphicsView(drawMapWidget);
+            arLayout->addWidget(graphicsView);
+
+            retranslateUi(drawMapWidget);
+
+            QMetaObject::connectSlotsByName(drawMapWidget);
+        } // setupUi
+
+        void retranslateUi(QWidget *drawMapWidget)
+        {
+            Q_UNUSED(drawMapWidget);
+        } // retranslateUi
+
+    };
+
+    class DrawMapWidget: public Ui_DrawMapWidget {};
+}
+
+class DrawMapWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit DrawMapWidget(QWidget *parent = 0);
+    ~DrawMapWidget();
+
+    void setScene(DrawMapScene * scene);
+
+protected:
+    void changeEvent(QEvent *e);
+    virtual void resizeEvent(QResizeEvent * event);
+
+private:
+    Ui::DrawMapWidget *ui;
+};
+
+#endif // DRAWMAPWIDGET_H
diff -r 54e78c40970b -r 63a21fac8bf7 tools/drawMapTest/mainwindow.cpp
--- a/tools/drawMapTest/mainwindow.cpp	Mon Dec 06 21:15:41 2010 -0500
+++ b/tools/drawMapTest/mainwindow.cpp	Tue Dec 07 22:02:09 2010 +0300
@@ -11,7 +11,8 @@
     ui->setupUi(this);
 
     scene = new DrawMapScene(this);
-    ui->graphicsView->setScene(scene);
+    //ui->graphicsView->setScene(scene);
+    ui->drawMapWidget->setScene(scene);
 
     connect(ui->pbUndo, SIGNAL(clicked()), scene, SLOT(undo()));
     connect(scene, SIGNAL(pathChanged()), this, SLOT(scene_pathChanged()));
@@ -34,14 +35,6 @@
     }
 }
 
-void MainWindow::resizeEvent(QResizeEvent * event)
-{
-    Q_UNUSED(event);
-
-    if(ui->graphicsView)
-        ui->graphicsView->fitInView(ui->graphicsView->scene()->sceneRect(), Qt::KeepAspectRatio);
-}
-
 void MainWindow::scene_pathChanged()
 {
     QString str = scene->encode().toBase64();
@@ -49,11 +42,6 @@
     ui->sbBytes->setValue(str.size());
 }
 
-void MainWindow::on_pbSimplify_clicked()
-{
-    scene->simplifyLast();
-}
-
 void MainWindow::on_pbSave_clicked()
 {
     QString fileName = QFileDialog::getSaveFileName(this, tr("Save map"), ".");
diff -r 54e78c40970b -r 63a21fac8bf7 tools/drawMapTest/mainwindow.h
--- a/tools/drawMapTest/mainwindow.h	Mon Dec 06 21:15:41 2010 -0500
+++ b/tools/drawMapTest/mainwindow.h	Tue Dec 07 22:02:09 2010 +0300
@@ -22,12 +22,9 @@
     Ui::MainWindow *ui;
     DrawMapScene * scene;
 
-    virtual void resizeEvent(QResizeEvent * event);
-
 private slots:
     void on_pbLoad_clicked();
     void on_pbSave_clicked();
-    void on_pbSimplify_clicked();
     void scene_pathChanged();
 };
 
diff -r 54e78c40970b -r 63a21fac8bf7 tools/drawMapTest/mainwindow.ui
--- a/tools/drawMapTest/mainwindow.ui	Mon Dec 06 21:15:41 2010 -0500
+++ b/tools/drawMapTest/mainwindow.ui	Tue Dec 07 22:02:09 2010 +0300
@@ -15,9 +15,6 @@
   </property>
   <widget class="QWidget" name="centralWidget">
    <layout class="QGridLayout" name="gridLayout" rowstretch="3,1">
-    <item row="0" column="2">
-     <widget class="QGraphicsView" name="graphicsView"/>
-    </item>
     <item row="1" column="2">
      <widget class="QPlainTextEdit" name="plainTextEdit"/>
     </item>
@@ -75,10 +72,21 @@
       </item>
      </layout>
     </item>
+    <item row="0" column="2">
+     <widget class="DrawMapWidget" name="drawMapWidget" native="true"/>
+    </item>
    </layout>
   </widget>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
+ <customwidgets>
+  <customwidget>
+   <class>DrawMapWidget</class>
+   <extends>QWidget</extends>
+   <header>drawmapwidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>
diff -r 54e78c40970b -r 63a21fac8bf7 tools/drawMapTest/qaspectratiolayout.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/drawMapTest/qaspectratiolayout.cpp	Tue Dec 07 22:02:09 2010 +0300
@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 2009 Nokia Corporation.
+ */
+
+#include "qaspectratiolayout.h"
+
+QAspectRatioLayout::QAspectRatioLayout(QWidget* parent, int spacing) : QLayout(parent) {
+        init(spacing);
+}
+
+QAspectRatioLayout::QAspectRatioLayout(int spacing) {
+        init(spacing);
+}
+
+QAspectRatioLayout::~QAspectRatioLayout() {
+        delete item;
+        delete lastReceivedRect;
+        delete _geometry;
+}
+
+void QAspectRatioLayout::init(int spacing) {
+        item = 0;
+        lastReceivedRect = new QRect(0, 0, 0, 0);
+        _geometry = new QRect(0, 0, 0, 0);
+        setSpacing(spacing);
+}
+
+
+/* Adds item if place isn't already taken. */
+void QAspectRatioLayout::add(QLayoutItem* item) {
+        if(!hasItem()) {
+                replaceItem(item);
+        }
+}
+
+/* Adds item if place isn't already taken. */
+void QAspectRatioLayout::addItem(QLayoutItem* item) {
+        if(!hasItem()) {
+                replaceItem(item);
+        }
+}
+
+/* Adds widget if place isn't already taken. */
+void QAspectRatioLayout::addWidget(QWidget* widget) {
+        if(!hasItem()) {
+                replaceItem(new QWidgetItem(widget));
+        }
+}
+
+/* Returns the item pointer and dereferences it here. */
+QLayoutItem* QAspectRatioLayout::take() {
+        QLayoutItem* item = 0;
+        if(this->hasItem()) {
+                item = this->item;
+                this->item = 0;
+        }
+        return item;
+}
+
+/* Returns the item pointer and dereferences it here. */
+QLayoutItem* QAspectRatioLayout::takeAt(int index) {
+        if(index != 0) {
+                return 0;
+        }
+        return this->take();
+}
+
+/* Returns the item pointer. */
+QLayoutItem* QAspectRatioLayout::itemAt(int index) const {
+        if(index != 0) {
+                return 0;
+        }
+        if(hasItem()) {
+                return this->item;
+        }
+        return 0;
+}
+
+/* Checks if we have an item. */
+bool QAspectRatioLayout::hasItem() const {
+        return this->item != 0;
+}
+
+/* Returns the count of items which can be either 0 or 1. */
+int QAspectRatioLayout::count() const {
+        int returnValue = 0;
+        if(hasItem()) {
+                returnValue = 1;
+        }
+        return returnValue;
+}
+
+/* Replaces the item with the new and returns the old. */
+QLayoutItem* QAspectRatioLayout::replaceItem(QLayoutItem* item) {
+        QLayoutItem* old = 0;
+        if(this->hasItem()) {
+                old = this->item;
+        }
+        this->item = item;
+        setGeometry(*this->_geometry);
+        return old;
+}
+
+/* Tells which way layout expands. */
+Qt::Orientations QAspectRatioLayout::expandingDirections() const {
+        return Qt::Horizontal | Qt::Vertical;
+}
+
+/* Tells which size is preferred. */
+QSize QAspectRatioLayout::sizeHint() const {
+        return this->item->minimumSize();
+}
+
+/* Tells minimum size. */
+QSize QAspectRatioLayout::minimumSize() const {
+        return this->item->minimumSize();
+}
+
+/*
+ * Tells if heightForWidth calculations is handled.
+ * It isn't since width isn't enough to calculate
+ * proper size.
+ */
+bool QAspectRatioLayout::hasHeightForWidth() const {
+        return false;
+}
+
+/* Replaces lastReceivedRect. */
+void QAspectRatioLayout::setLastReceivedRect(const QRect& rect) {
+        QRect* oldRect = this->lastReceivedRect;
+        this->lastReceivedRect = new QRect(rect.topLeft(), rect.size());
+        delete oldRect;
+}
+
+/* Returns geometry */
+QRect QAspectRatioLayout::geometry() {
+        return QRect(*this->_geometry);
+}
+
+/* Sets geometry to given size. */
+void QAspectRatioLayout::setGeometry(const QRect& rect) {
+        /*
+         * We check if the item is set and
+         * if size is the same previously received.
+         * If either is false nothing is done.
+         */
+        if(!this->hasItem() ||
+           areRectsEqual(*this->lastReceivedRect, rect)) {
+                return;
+        }
+        /* Replace the last received rectangle. */
+        setLastReceivedRect(rect);
+        /* Calculate proper size for the item relative to the received size. */
+        QSize properSize = calculateProperSize(rect.size());
+        /* Calculate center location in the rect and with item size. */
+        QPoint properLocation = calculateCenterLocation(rect.size(), properSize);
+        /* Set items geometry */
+        this->item->setGeometry(QRect(properLocation, properSize));
+        QRect* oldRect = this->_geometry;
+        /* Cache the calculated geometry. */
+        this->_geometry = new QRect(properLocation, properSize);
+        delete oldRect;
+        /* Super classes setGeometry */
+        QLayout::setGeometry(*this->_geometry);
+}
+
+/* Takes the shortest side and creates QSize
+ * with the shortest side as width and height. */
+QSize QAspectRatioLayout::calculateProperSize(QSize from) const {
+        QSize properSize;
+        if(from.height() * 2 < from.width()) {
+                properSize.setHeight(from.height() - this->margin());
+                properSize.setWidth(from.height() * 2 - this->margin());
+        }
+        else {
+                properSize.setWidth(from.width() - this->margin());
+                properSize.setHeight(from.width() / 2 - this->margin());
+        }
+        return properSize;
+}
+
+/* Calculates center location from the given height and width for item size. */
+QPoint QAspectRatioLayout::calculateCenterLocation(QSize from,
+                                                   QSize itemSize) const {
+        QPoint centerLocation;
+        if((from.width() - itemSize.width()) > 0) {
+                centerLocation.setX((from.width() - itemSize.width())/2);
+        }
+        if((from.height() - itemSize.height()) > 0) {
+                centerLocation.setY((from.height() - itemSize.height())/2);
+        }
+        return centerLocation;
+}
+
+/* Compares if two QRects are equal. */
+bool QAspectRatioLayout::areRectsEqual(const QRect& a,
+                                       const QRect& b) const {
+        bool result = false;
+        if(a.x() == b.x() &&
+           a.y() == b.y() &&
+           a.height() == b.height() &&
+           a.width() == b.width()) {
+                result = true;
+        }
+        return result;
+}
diff -r 54e78c40970b -r 63a21fac8bf7 tools/drawMapTest/qaspectratiolayout.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/drawMapTest/qaspectratiolayout.h	Tue Dec 07 22:02:09 2010 +0300
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2009 Nokia Corporation.
+ */
+
+#ifndef QASPECTRATIOLAYOUT_H_
+#define QASPECTRATIOLAYOUT_H_
+
+#include <QLayout>
+#include <QPointer>
+#include <QRect>
+#include <QWidgetItem>
+#include <QLayoutItem>
+
+
+class QAspectRatioLayout : public QLayout
+{
+        Q_OBJECT
+
+public:
+        QAspectRatioLayout(QWidget* parent, int spacing =-1);
+        QAspectRatioLayout(int spacing = -1);
+        ~QAspectRatioLayout();
+
+        /* Convenience method */
+        virtual void add(QLayoutItem* item);
+
+/* http://doc.trolltech.com/qlayout.html#addItem */
+        virtual void addItem(QLayoutItem* item);
+        /* http://doc.trolltech.com/qlayout.html#addWidget */
+        virtual void addWidget(QWidget* widget);
+        /* http://doc.trolltech.com/qlayout.html#takeAt */
+        virtual QLayoutItem* takeAt(int index);
+        /* http://doc.trolltech.com/qlayout.html#itemAt */
+        virtual QLayoutItem* itemAt(int index) const;
+        /* http://doc.trolltech.com/qlayout.html#count */
+        virtual int count() const;
+
+        /*
+         * These are ours since we do have only one item.
+         */
+        virtual QLayoutItem* replaceItem(QLayoutItem* item);
+        virtual QLayoutItem* take();
+        virtual bool hasItem() const;
+
+/* http://doc.trolltech.com/qlayout.html#expandingDirections */
+        virtual Qt::Orientations expandingDirections() const;
+
+        /*
+         * This method contains most of the juice of this article.
+         * http://doc.trolltech.com/qlayoutitem.html#setGeometry
+         */
+        virtual void setGeometry(const QRect& rect);
+        /* http://doc.trolltech.com/qlayoutitem.html#geometry */
+        virtual QRect geometry();
+
+        /* http://doc.trolltech.com/qlayoutitem.html#sizeHint */
+        virtual QSize sizeHint() const;
+        /* http://doc.trolltech.com/qlayout.html#minimumSize */
+        virtual QSize minimumSize() const;
+        /* http://doc.trolltech.com/qlayoutitem.html#hasHeightForWidth */
+        virtual bool hasHeightForWidth() const;
+
+private:
+        /* Saves the last received rect. */
+        void setLastReceivedRect(const QRect& rect);
+        /* Used to initialize the object. */
+        void init(int spacing);
+        /* Calculates the maximum size for the item from the assigned size. */
+        QSize calculateProperSize(QSize from) const;
+        /* Calculates the center location from the assigned size and
+         * the items size. */
+        QPoint calculateCenterLocation(QSize from, QSize itemSize) const;
+        /* Check if two QRects are equal */
+        bool areRectsEqual(const QRect& a, const QRect& b) const;
+        /* Contains item reference */
+        QLayoutItem* item;
+        /*
+         * Used for caching so we won't do calculations every time
+         * setGeometry is called.
+         */
+        QRect* lastReceivedRect;
+        /* Contains geometry */
+        QRect* _geometry;
+
+};
+
+#endif /* QASPECTRATIOLAYOUT_H_ */