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Cross-Platform Development with Qt 6 and Modern C++

You're reading from  Cross-Platform Development with Qt 6 and Modern C++

Product type Book
Published in Jun 2021
Publisher Packt
ISBN-13 9781800204584
Pages 442 pages
Edition 1st Edition
Languages
Author (1):
Nibedit Dey Nibedit Dey
Profile icon Nibedit Dey

Table of Contents (17) Chapters

Preface 1. Section 1: The Basics
2. Chapter 1: Introduction to Qt 6 3. Chapter 2: Introduction to Qt Creator 4. Chapter 3: GUI Design Using Qt Widgets 5. Chapter 4: Qt Quick and QML 6. Section 2: Cross-Platform Development
7. Chapter 5: Cross-Platform Development 8. Section 3: Advanced Programming, Debugging, and Deployment
9. Chapter 6: Signals and Slots 10. Chapter 7: Model View Programming 11. Chapter 8: Graphics and Animations 12. Chapter 9: Testing and Debugging 13. Chapter 10: Deploying Qt Applications 14. Chapter 11: Internationalization 15. Chapter 12: Performance Considerations 16. Other Books You May Enjoy

Drag and drop

In this section, we will learn about drag and drop (DnD). In a GUI application, DnD is a pointing device gesture in which the user selects a virtual object by grabbing it and then releasing it on another virtual object. The drag and drop operation starts when the user makes some gesture that is recognized as a signal to start a drag action.

Let's discuss how we can implement drag and drop using Qt Widgets.

Drag and drop in Qt Widgets

In Qt Widgets-based GUI applications, where drag and drop is used, the user starts dragging from a particular widget and drops the dragged object onto another widget. This requires us to reimplement several functions and it handles the corresponding events. The most common functions that need to be reimplemented to achieve drag and drop are as follows:

void dragEnterEvent(QDragEnterEvent *event) override;
void dragMoveEvent(QDragMoveEvent *event) override;
void dropEvent(QDropEvent *event) override;
void mousePressEvent(QMouseEvent...
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