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Merge pull request #167 from samsonwang/master
Windows raise widget example
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cmake_minimum_required(VERSION 3.7.0) | ||
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project(windows_raise_widget LANGUAGES CXX) | ||
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set(CMAKE_AUTOMOC ON) | ||
set(CMAKE_WIN32_EXECUTABLE TRUE) | ||
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# SingleApplication base class | ||
set(QAPPLICATION_CLASS QApplication) | ||
add_subdirectory(../.. SingleApplication) | ||
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find_package(Qt${QT_DEFAULT_MAJOR_VERSION} COMPONENTS Core Widgets REQUIRED) | ||
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add_executable(${PROJECT_NAME} main.cpp) | ||
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target_link_libraries(${PROJECT_NAME} SingleApplication::SingleApplication) |
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#include <QWidget> | ||
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#include "singleapplication.h" | ||
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#ifdef Q_OS_WINDOWS | ||
#include <Windows.h> | ||
#endif | ||
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void raiseWidget(QWidget* widget); | ||
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int main(int argc, char *argv[]) { | ||
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#ifdef Q_OS_WINDOWS | ||
SingleApplication app(argc, argv, true); | ||
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if (app.isSecondary()) { | ||
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AllowSetForegroundWindow( DWORD( app.primaryPid() ) ); | ||
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app.sendMessage("RAISE_WIDGET"); | ||
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return 0; | ||
} | ||
#else | ||
SingleApplication app(argc, argv); | ||
#endif | ||
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QWidget* widget = new QWidget; | ||
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#ifdef Q_OS_WINDOWS | ||
QObject::connect(&app, &SingleApplication::receivedMessage, | ||
widget, [widget] () { raiseWidget(widget); } ); | ||
#else | ||
QObject::connect(&app, &SingleApplication::instanceStarted, | ||
widget, [widget] () { raiseWidget(widget); } ); | ||
#endif | ||
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widget->show(); | ||
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return app.exec(); | ||
} | ||
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void raiseWidget(QWidget* widget) { | ||
#ifdef Q_OS_WINDOWS | ||
HWND hwnd = (HWND)widget->winId(); | ||
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// check if widget is minimized to Windows task bar | ||
if (::IsIconic(hwnd)) { | ||
::ShowWindow(hwnd, SW_RESTORE); | ||
} | ||
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::SetForegroundWindow(hwnd); | ||
#else | ||
widget->show(); | ||
widget->raise(); | ||
widget->activateWindow(); | ||
#endif | ||
} |
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# Single Application implementation | ||
include(../../singleapplication.pri) | ||
DEFINES += QAPPLICATION_CLASS=QApplication | ||
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QT += widgets | ||
SOURCES += main.cpp | ||
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win32{ | ||
LIBS += User32.lib | ||
} |