Graphical interface programming in C language is a very challenging and interesting task. Although C language is mainly used for system-level programming and algorithm development, we can still use some libraries to implement simple graphical interfaces. In this article, I will introduce a method for graphical interface programming in C language.
First, let's take a look at several commonly used graphics libraries that can help us create graphical interfaces in C language. The most commonly used graphics libraries are GTK (GIMP Toolkit) and Qt. These libraries provide a series of functions and tools that can help us create basic graphical interface components such as windows, buttons, labels, etc.
16How to program graphical interface in C language
Next, we will introduce how to use GTK in C language to create a graphical interface. First, we need to install the GTK development package. On Linux systems, we can use the package manager to install it. On Windows systems, we can download the installation package from the GTK official website.
After installation, we need to introduce the GTK header file into the code and use the gcc compiler to compile our program. Write a simple program to demonstrate how to create a window:
#include
int main(int argc, char *argv[]) {
GtkWidget *window;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), \Hello World\ gtk_widget_show(window);
gtk_main();
return 0;
}
In this example, we first introduced the GTK header file, and then maincalled gtk_initthe function in the function to initialize the GTK library. Next, we use gtk_window_newthe function to create a top-level window, and use gtk_window_set_titlethe function to set the title of the window to \Hello World\. Finally, we use gtk_widget_showthe function to display the window and call gtk_mainthe function to enter GTK's main loop.
The above code will create a simple window, but we can also add more components such as buttons, labels, etc. GTK provides a series of functions to create and configure these components. For example, to create a button we can use gtk_button_new_with_labelthe function:
GtkWidget *button;
button = gtk_button_new_with_label(\Click Me\
We can then gtk_container_addadd the button to the window using a function:
gtk_container_add(GTK_CONTAINER(window), button);
Finally, we need to use gtk_widget_showa function to display the button:
gtk_widget_show(button);
In a similar way, we can create and configure other graphical interface components. We can also use callback functions to handle events such as button clicks. For example, we can use g_signal_connecta function to connect the click event of a button to a callback function we wrote:
g_signal_connect(button, \clicked\ G_CALLBACK(on_button_clicked), NULL);
In the callback function on_button_clicked, we can write code to handle the button click event.
Through the above introduction, we can see that graphical interface programming in C language is not a complicated matter. Although the C language does not have a rich graphics library like Java or C++, we can still use libraries such as GTK to implement simple graphical interfaces.
To summarize, by using libraries such as GTK, we can perform graphical interface programming in C language. We can use a series of functions and tools to create and configure graphical interface components such as windows, buttons, labels, etc. We can also use callback functions to handle events such as button clicks. Although C language is mainly used for system-level programming and algorithm development, we can still implement simple graphical interfaces by using graphics libraries. I hope this article is helpful to you, thank you for reading!
Part of the code is transferred from: https://www.ktiao.com/c/2023-08/253652.html