Edit on GitHub Glade and Gtk. Builder class offers you the opportunity to design user interfaces without writing a single line of code. This is possible through describing the interface by an XML file and then loading the XML description at runtime and create the objects automatically, which the Builder class does for you. UI changes can be seen more quickly, so UIs are able to improve. Designers without programming skills can create and edit UIs.

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A window is designed using Glade 3 which is saved as a. A C program then opens the glade file when the compiled C program is run and uses it to display the designed window. This avoids having to lay out the window programmatically in the C code itself. Part 3 of GTK 3 Programming with C and Glade Tutorial Update October — see the video which demonstrates this tutorial using the latest version of Glade which looks different from the one in the text that follows.

Creating a Window in Glade Glade can be installed on a Debian based system such as Ubuntu or Linux Mint with the following command: sudo apt-get install glade To create a window in Glade, start the Glade application and follow the steps below. Creating a Top Level Window in Glade A new window will appear in Glade with its properties displayed in a pane at the right of the Glade editor window.

This is the name that the window will be referred to in the C code. The change is made in the Window Properties pane at the right of the Glade window. Change Glade Window ID 3. Change the Default Window Size The default size of the window can optionally be changed. This will be the size of the window when it is created by the C program.

The default window size is changed by scrolling down the General tab of the Window Properties pane and then checking the two checkboxes Default Width and Default Height. The width and height values next to the checkboxes can then be changed. The image below shows the window size being changed to pixels wide by pixels high.

Changing the Default Window Size in Glade 4. Connect a Callback Function to the destroy Signal When the window that is currently being designed in Glade is displayed by the C program, it will emit a destroy signal when the window is closed. A callback function needs to be connected to the destroy signal that will run when the window is closed. To add a callback function, click the Signals tab in the Window Properties pane of Glade.

Click the arrow next to GtkWidget to expand the list and then scroll down to destroy. Click the text that says Type here twice under the Handler heading. Text can now be typed into this field. Start by typing on — Glade will now suggest a name for the callback function that can be selected by pressing the keyboard down arrow and then the Enter key twice.

Connecting a Callback Function to the destroy Signal 5. Change the Window Title To change the title that will appear at the top of the window, click the General tab in the Window Properties pane and scroll down to find the box labelled Title under Appearance.

The image below shows the title of the window changed to Template Window. Changing the Window Title in Glade 6. Now that the Glade file has been created, the C application program can be created that will use the Glade file to display the window.

The C Program Code The code below is based on code from a tutorial by Micah Carrick which has since disappeared along with his website. The main. Create a file called main. Save this file to the same directory or folder that contains the glade file that you already created. It can be installed on a Debian based system such as Ubuntu or Linux Mint with the following command: sudo apt-get install libgtkdev The following line will compile the above code. When the application is run it displays the window that was created in Glade, as shown in the image below.

The window can be resized and closed.


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