Qt Image Viewer

Simple Qt Image Viewer Widget with support for panning, zoom and rotations. Implemented as an QOpenGLWidget.

Usage

Follow these instructions to embed the image viewer into your project:

1. Add siimageviewer.h and siimageviewer.cpp to your project.
2. Create an empty widget and promote it to SiImageViewer.
3. Call setImage(const QImage& image) to set the current image.

All you need to show an image is a QImage instance, which can be created from memory or file.

Shortcuts

Shortcut	Description
Scroll Wheel	Fast zooming
Shift + Scroll Wheel	Precise zooming
Scroll Wheell Press	Panning
Ctrl + R	Rotation in 90 degree steps
R + Left Mouse Button	Rotation in 90 degree steps
Shift + R + Left Mouse Button	Precise rot. around cursor
R	Reset all transformations

Building

To get a quick look the repository contains a small main window where you can open an image and interact with the viewer.

To build this project open it in QtCreator or manually build it given the CMakeLists.txt.