Weird background color with a QScrollArea under KDE 4.10

kevina67

Hi everybody,

I'm currently working on a project and I'd like to display a list of items, list with an unknown length at compile time. So I'm trying to use a QScrollArea to display list of any length without modifying the dimension of my window. It compiles but the aspect of my window is a bit weird imho.

I'll let you judge

Code:

@EditProjectSettingsDialog::EditProjectSettingsDialog(QWidget* parent) : QDialog(parent)
{
setWindowTitle(QObject::tr("Edit project settings"));
resize(640, 380);

_changesWereMade = false;

QVBoxLayout* mainLayout = new QVBoxLayout();
QTabWidget* projectConfigurationTabWidget = new QTabWidget();
QScrollArea* editCompilerConfigurationScrollArea = new QScrollArea();
editCompilerConfigurationScrollArea->setWidget(editCompilerConfigurationWidget());
projectConfigurationTabWidget->addTab(editCompilerConfigurationScrollArea, QObject::tr("Compiler"));
projectConfigurationTabWidget->addTab(editDirectoriesConfigurationWidget(), QObject::tr("Directories"));
mainLayout->addWidget(projectConfigurationTabWidget);

QHBoxLayout* buttonsLayout = new QHBoxLayout();
QPushButton* okButton = new QPushButton(QObject::tr("Ok"));
QObject::connect(okButton, SIGNAL(clicked()), this, SLOT(saveChanges()));
buttonsLayout->addWidget(okButton);
QPushButton* cancelButton = new QPushButton(QObject::tr("Cancel"));
QObject::connect(cancelButton, SIGNAL(clicked()), this, SLOT(close()));
buttonsLayout->addWidget(cancelButton);

mainLayout->addLayout(buttonsLayout);
setLayout(mainLayout);

}

QWidget* EditProjectSettingsDialog::editCompilerConfigurationWidget()
{
// Random stuff here
QFormLayout* editCMakeConfigurationLayout = new QFormLayout();

QComboBox* availablesCompilersComboBox = new QComboBox();

for (const QString& compilerName : availablesCompilers())
    availablesCompilersComboBox->addItem(compilerName);

editCMakeConfigurationLayout->addRow("Compiler: ", availablesCompilersComboBox);

editCMakeConfigurationLayout->addRow("Procude debugging symbols [-g]", new QCheckBox());
editCMakeConfigurationLayout->addRow("Have g++ follow the new C++ standard [-std=c++11]", new QCheckBox());
editCMakeConfigurationLayout->addRow("Inhibit all warning messages [-w]", new QCheckBox());
editCMakeConfigurationLayout->addRow("Warn if main is not conformant [-Wmain]", new QCheckBox());

// Some code concerning editCMakeConfigurationLayout

QWidget* editCMakeConfigurationWidget = new QWidget();
editCMakeConfigurationWidget->setLayout(editCMakeConfigurationLayout);

return editCMakeConfigurationWidget;

}@

Aspect of my window:

!http://sdz-upload.s3.amazonaws.com/prod/upload/qscrollarea.png(http://sdz-upload.s3.amazonaws.com/prod/upload/qscrollarea.png)!

Background color with a normal tab:

!http://sdz-upload.s3.amazonaws.com/prod/upload/normal1.png(http://sdz-upload.s3.amazonaws.com/prod/upload/normal1.png)!

As you can see, the two tabs doesn't have the same background color and that's annoying me.

Does anybody knows why it's so ? Thanks in advance ;)

raven-worx

the tabs itself actually have the same background color. The scroll view has the grey background.
You could use stylesheets to avoid the problem.

kevina67

Thanks raven-worx ;) I know understand the problem. But the thing is, if I manually modified the background color, I'll have to handle all the operating system the program could run on, don't I. Is there any os-agnostic way to proceed ?

raven-worx

only if you use the "platform macros":http://qt-project.org/doc/qt-4.8/qtglobal.html#Q_OS_LINUX:
@
#ifdef Q_OS_LINUX
scrollview->setStyleSheet(...);
#endif
@

kevina67

Ok thanks. I tought Qt would do it for me ;(
I'll try to work it out.