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1. Existing problems Current GUI development mode: absolute positioning Specify the location and size of each component directly at the pixel level void QWidget::move(int x, int y) void QWidget::resize(int w, int h); Problem: the position and size of the component cannot adapt to the change of the parent window 2. Solution: Layout Manager Prov ...

Public wheels / API It mainly stores global variables, configuration variables, some public method codes, user-defined logs, and redirects the output of Qt compiler information to local files. Log Library It is built to use mvlog library, cross platform general library and simple singleton mode. At the same time, it can redirect and output ...

QAbstractButton details 1, Description Base class for all button controlsProvide general functions of buttons Only by inheriting the abstract class and implementing the relevant methods can this class be used import sys from PyQt5.Qt import * # The use of abstract classes requires process implementation. All method overrides of abstract cl ...

Several installation methods of Qt under ubuntu This article introduces a variety of installation methods, including apt package management system, binary package, source code, and online installation of Qt SDK and Qt Creator. apt Execute the following commands in sequence # Open the terminal, right click on the desktop - > open term ...

brief introduction SwitchButton is a very common and practical button. I was surprised that there was no Switch in Qt, so I had to implement it myself. effect The renderings are shown below Control split 1, The control is generally composed of two parts, one is the background and the other is the white slider. The original background was ...

preface   as a sophomore, the author wrote a software based on QT, but the teacher refused to let us design games (GaN!) After consulting the teacher, he said let me design a video player, so I watched the video and typed the code myself (because the teacher's teaching level was too poor)    to tell the truth, it was a litt ...

preface . ini file is the abbreviation of Initialization File, i.e. Initialization File. It is the storage format adopted by the system configuration file of windows, which manages all configurations of windows. When developing programs, we often use ini files to configure software information. In particular, we need to display a large a ...

1, Briefly describe MVC and singleton mode 1. MVC design pattern Function: effectively separate data and user interface.Composition: model layer (representing data), view layer (representing user interface), control layer controller (defining user operations on the interface). 2. MVC frame diagram 3. Use MVC architecture to realize the pro ...

catalogue 1. QT event 1.1 event introduction 1.2. Event handling 2. Keyboard events 2.1,keyPressEvent 2.1.1 judge whether a key is pressed 2.1.2 key combination operation 3. Mouse event 3.1. Mouse click event 3.2. Mouse release event 3.3. Double click event 3.4. Mouse movement events 3.5 roller events 4. Event filter 4.1. Use of ...

1. Function introduction The current designed attendance system is mainly used by college teachers. During class, students enter the classroom, take out their student card and open their attendance. They can apply for leave in the system and view all class attendance information during school. Considering the large number of students in the w ...