After we got familiar with Qt Creator environment in the lesson 2 we will build a simple calculator in order to get familiar with some data types which come with Qt Creator framework like QString and other C++ primitive data types. First of all we need to create a new project as shown in the lesson 1 . During the creation, instead of mainwindow class we have used calculator class. After creating the project, in design view of qt creator we create the layout of our application. Initially we get a LineEdit element from the toolbox panel as shown in the figure 1. Figure 1: Add LineEdit on window After we add the line edit on window we fix the size according to our needs, in this case we fill the window horizontally by leaving some margin right and left. After we add the LineEdit element on window we need to add the buttons for the numbers and operations as well as shown in the figure 2. Figure 2: Add PushButton on window After we add the buttons as shown in the figure above we ...
In order to be able to continue developing further more the VOIP system we need to know which are the components that can be used to build a VOIP system and how they are implemented. In the book titled “Packet Guide to Voice over IP” VOIP is: “…exactly what the name indicates—sending voice (and video) over an IP-based network. This is completely different than the circuit-switched public telephone network…” ( Hartpence, 2013, p. 2). The fact that VOIP “…is completely different than the circuit-switched public tele‐ phone network…” ( Hartpence, 2013, p. 2)makes it possible to do things that are not possible with the standard telephony system, like programming customized applications based on individual needs. VOIP does not only allows to transmit voice over IP but video as well, and this makes communication through VOIP even richer in features. Comparison with traditional telephony VOIP gives the opportunity to use internet connection in order to implement system, while the trad...
Like every other programming language lesson series we will start with the "Hello World" application just to get a little bit familiar with the environment. After downloading the Qt Creator as shown in the lesson 0 and installing it, in order to create a new project you need to click on File->New File or Project, or you can click directly on the New Project button on the welcome screen of the Qt Creator as shown in the figure 1. Figure 1: Create new project After following the step above, in the New Project window, in the Projects session we choose Application and middle session we choose Qt Widgets Application as shown in the figure 2. Figure 2: Qt Widgets Application In the next window, Qt Widgets Application, we determine the name of the project and the location where it will be created. Figure 3: Name and location of the project After we click next, we reach the "Kits" window. Regarding the "Kits" in the Qt Creator we will talk later ...
Comments
Post a Comment