Qt Write Custom Control 5-Column Thermometer

Preface Column thermometer control, which may be one of many hands-on controls, is basically displayed vertically. There is a mercury column at the bottom, a scale in the middle, and a scale on the right or both sides of the left side. The scale can be changed with adaptive resolution. Sometimes the whole timer can be used to achieve the animat ...

Posted on Wed, 15 May 2019 07:52:12 -0700 by lazzerous

Qt Writing Custom Control 12-Progress Dashboard

Preface The main application scenario of the progress dashboard is to identify the status of a task's progress and so on. It can set range values and current values freely. Four kinds of indicators (circular indicator/pointer indicator/rounded pointer indicator/triangle indicator) are also provided for beauty. All kinds of colors can be set. Th ...

Posted on Tue, 30 Apr 2019 08:00:37 -0700 by StroiX

Qt Writing Custom Control 7 - Custom Draggable Polygon

Preface Customized draggable polygon control by Zhao Yanbo (QQ:408815041) zyb920@hotmail.com At the beginning, the main purpose of this control is to customize the draggable areas in the video area, which can be used as warning areas or other processing to get the corresponding set of polygon coordinates. The main difficulty of this control is ...

Posted on Wed, 24 Apr 2019 12:39:35 -0700 by DickDeeds

qtcreator implements onvif protocol device discovery under linux system

I. Development Environment Fedora23 qtcreator4.0.3 based on Qt5.6.2 Haikang Video DS-2CD2512F-IS Camera II. Creating Engineering I like using qtcreator very much. Its powerful function of completing and checking errors makes it very comfortable to use. So use qtcreator to create this project. The creation steps are as follows 1. Open qtc ...

Posted on Mon, 01 Apr 2019 20:15:28 -0700 by capslock118

Deep understanding of the SIGNAL SLOT mechanism of QT s (I): How SIGNAL SLOT is used

First, it is declared that different versions of QT have slightly different implementations for signals and slots, and most interfaces are the same. I used QT5.9.1. The SIGNAL/SLOT of the QT is a bit like the observer pattern. It is said that the SDN is always done in the stage. In the code of the controller, it is use ...

Posted on Wed, 13 Feb 2019 00:39:18 -0800 by coder9