< PoliciesRevision as of 19:39, 30 March 2009 by Rakuco (talk | contribs) (Removed extra blank line.)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) There are classes and functions that should be avoided in KDE applications, but KDE has no direct control over them (for example, they are part of Qt). Contents 1 API that has KDE replacements 1.1 Qt classes that have their KDE versions 1.2 QSystemTrayIcon::showMessage() 2 API that is considered broken 2.1 QWidget::showFullScreen/Maximized/Minimized/Normal() 3 Further Links API that has KDE replacements Qt classes that have their KDE versions KDE applications should not use Qt classes that have their KDE replacements. Examples include QFileDialog, QDialog, QMainWindow. KDE versions of these classes provide better integration with KDE. QSystemTrayIcon::showMessage() Use KNotification for better KDE integration. API that is considered broken QWidget::showFullScreen/Maximized/Minimized/Normal() Try to avoid calls to QWidget::showFullScreen(), QWidget::showMaximized(), QWidget::showMinimized() and QWidget::showNormal(), use them only if you understand what they do and you really want that. These calls do not only change the relevant window state as most people expect, but they also have other effects. For example, showFullScreen() among other things also removes the maximized state (see bug #157941), the same way showNormal() is not an inverse call to showFullScreen(). Either use QWidget::setWindowState() in the following way widget->setWindowState(widget->windowState() | Qt::WindowFullScreen); // set widget->setWindowState(widget->windowState() & ~Qt::WindowFullScreen); // reset or use KDE API - KToggleFullScreenAction has setFullScreen() helper function, and KWindowSystem has calls for changing window state. Further Links For further programming tips, please read the article about common programming mistakes. Retrieved from "https://community.kde.org/index.php?title=Policies/API_to_Avoid&oldid=47696" Content is available under Creative Commons License SA 4.0 unless otherwise noted.