Qt Creator provides a cross-platform, complete integrated development environment (IDE) for application developers to create applications for multiple desktop. You can use Qt Creator to create applications for several platforms by using several technologies. The tutorials in this manual explain how to create some basic. Qt Creator Manual - The manual contains information on how to achieve training material are available as videos, downloadable code, and PDF files.
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Qt Designer is the Qt tool for designing and building graphical user interfaces ( GUIs) with Qt Widgets. You can compose and customize your windows or dialogs . Remark: This tutorial series target mainly Qt4. Even if most of these tutorials are Before writing our first GUI app, let's discover Qt Creator. 3 Qt Creator IDE. In the background, Qt Creator runs qmlscene and passes your QML document as the first argument. The qmlscene.
Well use these to set up the user controls for the number of sides and the radius of the polygon to be displayed. Feel free to play around with the various mechanisms for aligning and arranging these widgets. There are lots of fun springy Spacer tools as well as vertical, horizontal, grid, and form Layouts.
You may also want to play with setting the Size Constraints for some of your widgets like buttons in conjunction with these layouts. Note that again, the header and source les are automatically declared for you: 3. To do so, select the spin box you want to limit, and then scroll to the bottom of the Property Value window the lower righthand corner. The three methods we will need to include are: initializeGL which will be called to initialize the GL Context resizeGL which will be called when the widget is resized There you can set the minimum and maximum values for each spin box, as well as the number of decimals and the size of each step.
We recommend: Sides: ranging [3, 60] Radius: ranging [1, 5] with 1 decimal place, and each step being 0. To do this, lets add a new class to the project by selecting: File New File or Project Notice how the header le is automatically lled in for you, and click Add. For clarity, lets rename this object to panelGL: 5. Unfortunately, you will notice that the changeSides int method isnt available from the list of slots, and so you will need to add it by clicking Edit Now, to add some functionality! Using this same method, congure another connection so that: when the Radius spin box has its valueChanged double , the changeRadius double method is called.
Now its nally time to make those buttons do something.
While still in the Design editor, select: Filling in Functions Youll notice that every object now has a blue box around it, and youre able to click and drag arrows to indicate interactive relationships.
Well start with an easy one: 5. We will leave the coding of the straightforward methods changeSides int s and changeRadius double r to you without additional instruction, and move on to the more interesting OpenGL methods.
It is important, however, to call updateGL after updating either the sides or the radius to prompt OpenGL to redraw. Click and drag on the Quit button object, releasing the mouse somewhere that the head of the arrow is touching only the mainwindow. When you release the mouse, a dialog box will pop up: 4 6.
You can read more about glHint appears in the right place. Well do this using: online if youre curious. Next, well call: glTranslated 5. Now, well set the width and color of the pen: glLineWidth 1 ; glColor3f 0, 0. The installer will come up. Hit Next. If you have a Qt online account, enter the information here.
If you want to create one, go ahead. Otherwise just select Skip to proceed. Click Next. It will now download information about the available components from a remote server. Pick the installation folder the default is normally fine unless you need more disk space on another drive.
A path with spaces in it or that is very long may cause problems later, so avoid doing that. Let's do a minimal install. If you want more components you can select them.
I expanded Qt 5. The only other item I selected was under Tools, where Qt Creator 4. Next read and accept the license agreement. Then pick the Start menu shortcuts you want. The default is typically fine. Installation is now ready, so select Next. At this point it will download all the selected components.
This will take a while depending on the speed of your Internet connection. After downloads are completed it will start installing. Qt Creator will launch and show the Welcome screen. Qt Creator should auto-detect the Qt install and compiler and create a "kit" for desktop development. We can now test the installation by creating a simple project.
Pick the kit only one option is available then Next. You can specify some more information. Pick the defaults unless you want to use something else. Pick no project management. You will now see the created skeleton application. You can look at the source code if desired: a main.