diff options
Diffstat (limited to 'README.md')
-rw-r--r-- | README.md | 25 |
1 files changed, 12 insertions, 13 deletions
@@ -3,11 +3,11 @@ SingleApplication This is a replacement of the QSingleApplication for `Qt5`. -Keeps the Primary Instance of your Application and kills each subsequent instance. +Keeps the Primary Instance of your Application and kills each subsequent instances. Usage ----- -The `SingleApplication` class inherits from `QApplication`. Use it as if you are using the `QApplication` class. +The `SingleApplication` class inherits from whatever `Q[Core|Gui]Application` class you specify in the `*.pro` file. Further usage is similar to use one of the `Q[Core|Gui]Application` classes. The library uses your `Organization Name` and `Application Name` to set up a `QLocalServer` and a `QSharedMemory` block. The first instance of your Application would check if the shared memory block exists and if not it will start a `QLocalServer` and then listen for connections on it. Each subsequent instance of your application would check if the shared memory block exists and if it does, it will connect to the QLocalServer to notify it that a new instance had been started, after which would terminate the new instance with status code `0`. The Primary Instance, `SingleApplication` would emmit the `showUp()` signal upon detecting that a new instance had been started. @@ -15,6 +15,10 @@ The library uses `stdlib` to terminate the program with the `exit()` function. Here is an example usage of the library: ```cpp +// project.pro +DEFINES += QAPPLICATION_CLASS=QApplication # or whatever app class you want + +// main.cpp #include "singleapplication.h" int main(int argc, char *argv[]) @@ -34,21 +38,16 @@ The SingleApplication class implements a `showUp()` signal. You can bind to that Note that since `SingleApplication` extends the `QApplication` class you can do the following: ```cpp -QObject::connect(QApplication::instance(), SIGNAL(showUp()), window, SLOT(raise())); // window is your QWindow instance +// Truly raise your window. +QObject::connect(&app, &SingleApplication::showUp, [&]{ + window.show(); + window.raise(); + window.activateWindow(); + }); // 'window' is your QWindow instance ``` Using `QApplication::instance()` is a neat way to get the `SingleApplication` instance at any place in your program. -Extending from other application classes ------------------------ - -`SingleApplication` extends from the `QApplication` class by default , but you can easily change that to `QGuiApplication` or `QCoreApplication` with the `QAPPLICATION_CLASS` macro. Define it before the include statement of `singleapplication.h` or change the default value in the file. - -__Example:__ - -```cpp -#define QAPPLICATION_CLASS QCoreApplication -``` Implementation -------------- |