Qt5 GUI How To Create Gradient Colors

In this Qt5 GUI article we are going to talk about How To Create Gradient Colors, also we are going to create some practical examples.

 

Qt5 Gradients

Qt currently supports three types of gradient fills:

  • Linear gradients interpolate colors between start and end points.
  • Simple radial gradients interpolate colors between a focal point and end points on a circle surrounding it.
  • Extended radial gradients interpolate colors between a center and a focal circle.
  • Conical gradients interpolate colors around a center point.

 

The colors in a gradient are defined using stop points of the QGradientStop type; i.e., a position and a color. Use the setColorAt() function to define a single stop point.

Alternatively, use the setStops() function to define several stop points in one go. Note that the latter function replaces the current set of stop points.

It is the gradient’s complete set of stop points (accessible through the stops() function) that describes how the gradient area should be filled.

If no stop points have been specified, a gradient of black at 0 to white at 1 is used.

A diagonal linear gradient from black at (100, 100) to white at (200, 200) could be specified like this:

 

 

A gradient can have an arbitrary number of stop points. The following would create a radial gradient starting with red in the center, blue and then green on the edges:

 

For more information you can check Qt5 Documentation 

 

 

So first of all you need to create a New Project in Qt5 framework, after that open your mainwindow.h and add this header file.

 

 

Also in your mainwindow.h you need to write the paintEvent() method of QPainter class in the public section of the class

 

 

After adding your mainwindow.h will looks like this

 

 

 

 

So after that you need to add the paintEvent() definition in mainwindow.cpp and add the code for creating Gradients

 

 

So basically in the above code we have three different gradients, and we are going to implement these gradients colors to a rectangle

 

 

After adding your mainwindow.cpp will be like this

 

 

 

 

Also check Qt5 C++ GUI Development Articles in the below links

 

1: Qt5 C++ Introduction And Installation

2: Qt5 C++ First Console Application 

3: Qt5 C++ First GUI Application 

4: Qt5 C++ Signal And Slots Introduction

5: Qt5 C++ Layout Management 

6: Qt5 C++ Creating Qt Style Sheets

7: Qt5 C++ Creating QPushButton

8: How To Create QCheckBox in Qt5

9: Qt5 GUI How To Create QRadioButton

10: Qt5 GUI Development How To Create ComboBox

11: Qt5 C++ GUI Development Creating QListWidget

12: Qt5 C++ GUI Development Creating QMessageBox

13 : Qt5 C++ GUI Creating QMenu And QToolbar

14: Qt5 C++ GUI Development Creating QPrintDialog

15: Qt5 C++ GUI Development Creating QFontDialog

16: Qt5 C++ GUI Development Creating QColorDialog

17: How to Create QFileDialog in Qt5

18: How to Create QProgressbar in Qt5 C++

19: How to Create QPropertyAnimation in Qt5

20: How To Control QPropertyAnimation in Qt5 

21: How To Create AnimationGroup in Qt5

22: How To Create State Machine in Qt5 C++

23: How To Draw Text And Line in Qt5

24: Qt5 GUI How To Draw Rectangle 

25: Qt5 GUI How To Draw Ellipse 

 

 

So run the complete project and this will be the result

 

Qt5 GUI How To Create Gradient Colors
Qt5 GUI How To Create Gradient Colors

 

 

Also you can watch the complete video for this article

 

 

Subscribe and Get Free Video Courses & Articles in your Email

 

Share via
Copy link
Powered by Social Snap
×