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Thread: Android screen res problem (it's always 640x480 instead of maximized) -- Qt 5.1, XP

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  1. 18th July 2013, 12:01 #1
    andruxa
    andruxa is offline Beginner
    Join Date
    Jul 2013
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    Qt products
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    Windows Android

    Default Android screen res problem (it's always 640x480 instead of maximized) -- Qt 5.1, XP

    Good time of the day!

    I'm struggling for two days with a problem, which appears with the android build (latest Qt 5.1 and Qt Creator 2.7.2) on WinXP (but I think it don't matter), latest NDK, SDK, and WinAnt. In two words, android app always uses 640x480 resolution! The problem disappers once when I manually cleaned all the files built in the project, including *.pro.user, and rebuilt project from scratch. But one build later the problem returns (code changes cannot affect this, I'm sure). I didn't tried for more than one time to cleanup the project, because I think the problem is not in project properties (which hasn't changed between launches).

    Please at picture attached. The situation is not only on emulator occurs, but on the real device too. However, windows app running as expected.

    The actual code is the following:
    main.cpp
    Qt Code: 
    1. #include "mainwindow.h"
    2. #include "mainwidget.h"
    3.  
    4. #include <QApplication>
    5. #include <QTime>
    6.  
    7. int main(int argc, char *argv[])
    8. {    
    9.     QApplication app(argc, argv);
    10.  
    11.     qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
    12.  
    13.     MainWindow main_window;
    14.     main_window.showMaximized();
    15.     main_window.setCentralWidget(new MainWidget(&main_window));
    16.  
    17.     return app.exec();
    18. }
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    mainwindow.h
    Qt Code: 
    1. #ifndef MAINWINDOW_H
    2. #define MAINWINDOW_H
    3.  
    4. #include <QMainWindow>
    5.  
    6. class MainWindow : public QMainWindow
    7. {
    8.     Q_OBJECT
    9.  
    10. public:
    11.     MainWindow(QWidget *parent = 0);
    12.     ~MainWindow();
    13. };
    14.  
    15. #endif // MAINWINDOW_H
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    mainwidget.h
    Qt Code: 
    1. #ifndef MAINWIDGET_H
    2. #define MAINWIDGET_H
    3.  
    4. #include <QGraphicsView>
    5.  
    7. class QImage;
    9.  
    10. class MainWidget : public QGraphicsView
    11. {
    12.     Q_OBJECT
    13. public:
    14.     explicit MainWidget(QWidget *parent);
    15. protected:
    16.     void drawBackground(QPainter *painter, const QRectF& rect);
    17.  
    18. private:
    19.  
    20.     void createGameScene();
    21.  
    22.     QGraphicsScene      * scene;
    23.     QWidget             * parent;
    24.     QGraphicsPixmapItem * splash, * score, * blueMeeple, * redMeeple;
    25.  
    26. private slots:
    27.     void unsetSplash();
    28.  
    29. };
    30.  
    31. #endif // MAINWIDGET_H
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    [/code]

    mainwindow.cpp
    Qt Code: 
    1. #include "mainwindow.h"
    2.  
    3. MainWindow::MainWindow(QWidget *parent)
    4.     : QMainWindow(parent) {
    5.     setStyleSheet("background-color: darkGrey;");
    6. }
    7.  
    8. MainWindow::~MainWindow() {
    9.  
    10. }
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    mainwidget.cpp
    Qt Code: 
    1. #include "mainwidget.h"
    2.  
    3. #include <QGraphicsScene>
    4. #include <QGraphicsPixmapItem>
    5. #include <QTimer>
    6.  
    7. MainWidget::MainWidget(QWidget *parentWidget):
    8.     QGraphicsView(parentWidget), parent(parentWidget), splash(0), score(0) {
    9.     scene = new QGraphicsScene;
    10.     scene->setItemIndexMethod(QGraphicsScene::NoIndex);
    11.  
    12.     setScene(scene);
    13.  
    14.     setCacheMode(CacheBackground);
    15.     setViewportUpdateMode(FullViewportUpdate);
    16.     setRenderHint(QPainter::Antialiasing);
    17.  
    18.     scene->addItem(splash = new QGraphicsPixmapItem(QPixmap(":/images/DiscoveryArt.jpg")));
    19.     QTimer::singleShot(2000, this, SLOT(unsetSplash()));
    20. }
    21.  
    22. void MainWidget::drawBackground(QPainter *painter, const QRectF& rect) {
    23.     scene->setSceneRect(20, 20, parent->geometry().width() - 20, parent->geometry().height() - 20);
    24.     QRectF scene_rect = scene->sceneRect();
    25.  
    26.     if (splash)
    27.         splash->setPos(mapToScene(rect.width()/2 - splash->pixmap().width()/2,
    28.                                   rect.height()/2 - splash->pixmap().height()/2));
    29.  
    30.     QRectF right_shadow(scene_rect.right(), scene_rect.top() + 5, 5, scene_rect.height());
    31.     QRectF bottom_shadow(scene_rect.left() + 5, scene_rect.bottom(), scene_rect.width(), 5);
    32.  
    33.     if (right_shadow.intersects(rect) || right_shadow.contains(rect))
    34.         painter->fillRect(right_shadow, Qt::darkGray);
    35.  
    36.     if (bottom_shadow.intersects(rect) || bottom_shadow.contains(rect))
    37.         painter->fillRect(bottom_shadow, Qt::darkGray);
    38.  
    39.     QLinearGradient gradient(scene_rect.topLeft(), scene_rect.bottomRight());
    40.     gradient.setColorAt(0, Qt::white);
    41.     gradient.setColorAt(1, Qt::lightGray);
    42.     painter->fillRect(rect.intersected(scene_rect), gradient);
    43.     painter->setBrush(Qt::NoBrush);
    44.     painter->drawRect(scene_rect);
    45. }
    46.  
    47. void MainWidget::unsetSplash() {
    48.     scene->removeItem(splash);
    49.     delete splash;
    50.     splash = 0;
    51.     createGameScene();
    52.     update();
    53. }
    54.  
    55. void MainWidget::createGameScene() {
    56.     scene->addItem(score = new QGraphicsPixmapItem(QPixmap(":/images/DiscoveryScore.jpg")));
    57.     score->setPos(mapToScene(scene->sceneRect().top(),scene->sceneRect().left()));
    58.     scene->addItem(redMeeple = new QGraphicsPixmapItem(QPixmap(":/images/DiscoveryRedMeeple.png")));
    59.     redMeeple->setPos(score->boundingRect().left() + 30, score->boundingRect().bottom() - 20);
    60.     scene->addItem(blueMeeple = new QGraphicsPixmapItem(QPixmap(":/images/DiscoveryBlueMeeple.png")));
    61.     blueMeeple->setPos(score->boundingRect().left() + 60, score->boundingRect().bottom() - 20);
    62. }
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    *.pro file
    Qt Code: 
    1. #-------------------------------------------------
    2. #
    3. # Project created by QtCreator 2013-07-16T22:21:30
    4. #
    5. #-------------------------------------------------
    6.  
    7. QT       += core gui
    8.  
    9. greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
    10.  
    11. TARGET = Discovery
    12. TEMPLATE = app
    13.  
    14. RESOURCES     = discovery.qrc
    15.  
    16. SOURCES += main.cpp\
    17.         mainwindow.cpp \
    18.     mainwidget.cpp
    19.  
    20. HEADERS  += mainwindow.h \
    21.     mainwidget.h
    22.  
    23. CONFIG += mobility
    24. MOBILITY = 
    25.  
    26. OTHER_FILES += \
    27.     android/AndroidManifest.xml \
    28.     android/res/layout/splash.xml \
    29.     android/res/values/libs.xml \
    30.     android/res/values/strings.xml \
    31.     android/res/values-de/strings.xml \
    32.     android/res/values-el/strings.xml \
    33.     android/res/values-es/strings.xml \
    34.     android/res/values-et/strings.xml \
    35.     android/res/values-fa/strings.xml \
    36.     android/res/values-fr/strings.xml \
    37.     android/res/values-id/strings.xml \
    38.     android/res/values-it/strings.xml \
    39.     android/res/values-ja/strings.xml \
    40.     android/res/values-ms/strings.xml \
    41.     android/res/values-nb/strings.xml \
    42.     android/res/values-nl/strings.xml \
    43.     android/res/values-pl/strings.xml \
    44.     android/res/values-pt-rBR/strings.xml \
    45.     android/res/values-ro/strings.xml \
    46.     android/res/values-rs/strings.xml \
    47.     android/res/values-ru/strings.xml \
    48.     android/res/values-zh-rCN/strings.xml \
    49.     android/res/values-zh-rTW/strings.xml \
    50.     android/src/org/kde/necessitas/ministro/IMinistro.aidl \
    51.     android/src/org/kde/necessitas/ministro/IMinistroCallback.aidl \
    52.     android/src/org/qtproject/qt5/android/bindings/QtActivity.java \
    53.     android/src/org/qtproject/qt5/android/bindings/QtApplication.java \
    54.     android/version.xml \
    55.     android/AndroidManifest.xml \
    56.     android/res/layout/splash.xml \
    57.     android/res/values/libs.xml \
    58.     android/res/values/strings.xml \
    59.     android/res/values-de/strings.xml \
    60.     android/res/values-el/strings.xml \
    61.     android/res/values-es/strings.xml \
    62.     android/res/values-et/strings.xml \
    63.     android/res/values-fa/strings.xml \
    64.     android/res/values-fr/strings.xml \
    65.     android/res/values-id/strings.xml \
    66.     android/res/values-it/strings.xml \
    67.     android/res/values-ja/strings.xml \
    68.     android/res/values-ms/strings.xml \
    69.     android/res/values-nb/strings.xml \
    70.     android/res/values-nl/strings.xml \
    71.     android/res/values-pl/strings.xml \
    72.     android/res/values-pt-rBR/strings.xml \
    73.     android/res/values-ro/strings.xml \
    74.     android/res/values-rs/strings.xml \
    75.     android/res/values-ru/strings.xml \
    76.     android/res/values-zh-rCN/strings.xml \
    77.     android/res/values-zh-rTW/strings.xml \
    78.     android/src/org/kde/necessitas/ministro/IMinistro.aidl \
    79.     android/src/org/kde/necessitas/ministro/IMinistroCallback.aidl \
    80.     android/src/org/qtproject/qt5/android/bindings/QtActivity.java \
    81.     android/src/org/qtproject/qt5/android/bindings/QtApplication.java \
    82.     android/version.xml
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    Please help me to solve the issue, I can't develop further with this behavior.
    Thanks in advance, Andrey
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