QT Draw Pixmap # QT Creator # Radar

Create Pixmap 

Step 1.
Create View
create view

check the width and height

Step 2.
Calculate Diameter and Center Point


Step 3.
Create Qt Project choose widget



Step 4. 
Create RadarScene


Structure

Step 5.
prepare RadarScene.h file

use QWidget

prepare function and parameter


Step 6.
prepare RadarScene.cpp file, Calculate diameter and center point


Step 7.
when called update() will execute paintEvent


Step 8.
paint Scene use Pixmap


return Pixmap


Step 9. 
Create Timer to update View use timeout() signal


View like this


留言

熱門文章

1x Enginner #一般的工程師,該具備什麼條件

2021申請 Android Developer 開發者帳號及上架步驟

Generate Signed Bundle / APK(s) & Bundle Tool 基本使用 & .aab安裝方式