of digits which can be displayed on lcd can also be set from here itself. In this example I have set the min value as 0 and max as 99. Do not forget to save the project side by side while making the changes.Click on the window property editor, from where you can set the dial’s min, max value, step change etc. To add the functionality to the dial and slider, just add the line Repeat the same step with right clicking on the horizontal slider.Īfter doing the above step, the mainwindow.cpp and mainwindow.h file will automatically create these two methods and their declarations in the header file. There will be several options available, select the ‘ value(changed) ‘ option. So right click on the dial and click on ‘Go to slot’. Now we have to assign signals and slots, since we want to notify the lcd to increment or decrement the number while the dial or the slider is moved. In this example, I have used a dial, a horizontal slider and a LCD number. h.Ĭlick on the mainwindow.ui, and drag and drop the components which you want to include in the ui. Go to the next step and click on finish project.The IDE will show your project with some files, which are automatically generated by Qt, in the project explorer. Give a name to your project and select the Desktop Qt version. The Qt C++ project has three options, from that select the first one, Qt Gui Application. So to start building the application, you need to have a Qt SDK 4.7 or higher, which you can get from here.Īfter you are done with the installation, click on create project and select Qt C++ Project. By moving the dial clockwise or anti- clockwise or by moving the slider left or right, the value on the lcd changes. Here I have described about a simple slider and dial desktop application. Qt is widely used for developing applications with a GUI.
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