To Display Images in Full-Screen by PySide


Introduction

Recently, I started Python programming to make applications on multi-platform. I selected “PySide” as a GUI library, and have been having trial and error in various ways. From those, I would like to post articles as a result of playing my particular interest. This time, I will describe how to display image in the full screen.

In addition, although 2.x mainstream is still Python, because movement to migrate to 3.x is likely to be activated in the future and 3.x is suitable to support Japanese language, I am programming in Python3.3. Therefore, please note the following code does not take into account any operation in 2.x.

Display an Image

First, I’ll try to make a code to display an image in PySide. You will see the JPEG file called “hoge.jpg”.

Read the image by the “QPixmap” object, set it to “QLabel” object by “setPixmap()” and display it by “show()” method. Although you would think that “label” is for displaying “text”, “QLabel” will function as a screen for image and text.

Window appears on the desktop as follows.
normal

Display Image in Full Screen

By changing “show()” to “showFullScreen()” in line 8, you can achieve the full-screen display.

It is displayed in full screen as follows. There is no frame of the window.
full

However, “close button” does not appear in full screen state. You will need to be able to release the full screen by handling the key event. (If you happen to display in full screen without any measures, switch to another task by ALT + TAB, and then you can close the application from the taskbar.)

Get the Key Events of QLabel

“QLabel”, as one of the parts of GUI, is inherit “QWidget”. It has the method “keyPressEvent” to handle the key events.

Define a class called “Screen” that inherits from “QLabel”, then you are going to be able to handle the ESC key to override the “keyPressEvent”.

If you press the ESC key, display is switched in maximum display / full screen. Please note that in order to return to the normal display, you’re calling the “showNormal()”.

By using this “Screen” class instead of QLabel, you will respond to the ESC key.

If you press the ESC key in the state of being full screen display, display change to maximum as shown below. If in this state, you will be able to terminate the program in close button.
max

The way of the adjustment of display position, please refer to the reference of “QLabel”.

In addition, since I have prepared here the complete code. Prepare a “hoge.jpg” and try it.

[Rlated Sites]
junf/PySideSamples · GitHub

[Rlated Articles]

  1. Display Images in Full-Screen by Qt, Multi-Platform GUI Lib | DeVlog – Fly With Your Devil’s Wings –
  2. Behavior of “geometry” Property and “show” Method in PySide | DeVlog – Fly With Your Devil’s Wings –
  3. Display Image While Sliding by PySide | DeVlog – Fly With Your Devil’s Wings –
  4. Fade in / Fade-out Images by PySide | DeVlog – Fly With Your Devil’s Wings –
  5. Realize Zoom-in and Zoom-out the Image in PySide | DeVlog – Fly With Your Devil’s Wings –

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