hello im looking for Qt graph widgets that are free
something like qwt.sourceforge.net/
Outside of Qt, there's also MathGL, which is a powerful graphing library as well. It can create images (png, jpg, svg etc...) which can easily be displayd in a Qt widget. You'll of course have to sacrifice the interactivity that Qwt can offer.
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before I used Qt and customized my own Widget which is inherits from QGLWidget
i used OpenGl in standard projects and free glut.
by doing this, I used glutBitmapChracter but now in Qt there is no need to manage windows because I created customize widget with gui.
so how can I draw text on the widget?
if I want to include the free glut and use glutBitmapCharacter I nedd also to init the glut and im getting confused?
is there any other way or do I have to use external library?
You are using a QGLWidget and want to draw 2D text on top of the 3D scene?
glutBitmapCharacter should still work in a QGLWidget, just like other GL library code. I do not think you need to call glutInit to use the GLUT character drawing functions.
Or you could use the Qt 2D text drawing methods (QPainter) to draw text on top of your QGLWidget. A Qt book or online documentation will explain how to do this. (I have the books on Qt programming by Blanchette and Summerfield, and can recommend them.)
Hope this helps.
I am working on OpenGL to create a GUI .I want to create some tabs which will help me to display different things in different windows. How is this possible using OpenGL? I read in some articles that we can use QT for that. Since I have already developed some of the GUI part in OpenGL using GLUT library ,is it possible to use the same code in QT? If so brief me how to make settings for OpenGL libraries in QT creator.
In my GUI I am trying to create a Car which is following a track.
I think you might be mixing some things up: OpenGL is a API with which you can instruct drivers to draw visual primitives, like lines, boxes, 3D triangles, pictures from buffer onto a render plane.
GLUT is a library that gives you a minimal environment around that, ie. it handles creating a window etc.
Neither of them are high-level UI description tools. Qt is really most likely what you want, as it will not only give you things like tab widgets etc, but also a feature-rich framework to do things like defining what should happen when you click a button, close a window etc.
There's a lot of examples of OpenGL usage within Qt widgets. In fact, a lot of visualization frontends use Qt and OpenGL. Qt has extensive documentation on how to generate OpenGL contextes and draw inside Qt applications.
I am new to Qt and was curious if we can develop HMI for a Cluster(Instrument Cluster Panel) using Qt.
Can someone share a demo?
I might be in a wrong place to post this question, please don't flag.
I am looking for Examples/Demo in QT 5. (5.3.1)
Look at this widgets on Qt Apps website:
http://qt-apps.org/content/show.php/AnalogWidgets?content=87780
As you can see there are many beautiful widgets. For example:
There is also Qwt: well documented tool with a lot of different technical widgets.
http://qwt.sourceforge.net/index.html
From here
A good example is a dial-type control which combines Image elements with Rotation transforms and SpringAnimation behaviors to produce an interactive speedometer-type dial. You can find the example in the installed Qt directory in Examples/Qt-5.3/quick/customitems/dialcontrol.
I'm trying to display some kind of branches with Qt. How do I go about this? Will I have to draw it myself? Is there some control/thing that will do this for me?
(source: hades.name)
You will have to do it yourself, use QGraphicsScene and QGraphicsView.
To layout the graph, you may want to look at GraphViz - a graph visualisation tool.
You could just use the GraphViz algorithms for layout (using plain output) and then draw using the Qt libraries (QGraphicsScene / QGraphicsView like #cbamber85 recommended), or you could render a PNG from GraphViz and then display it.
You may want to look at KCacheGrind, as this is a Qt application that uses GraphViz for laying out call graphs.
I can't find anything about how to embed plotting into Qt by using C++. Which component in Qt should be used for plotting?
I want to grasp the thing generated by these lib and display it using Qt.
I have a working example at this blogpost combining embedded R with Qt. I used both SVG and PNG graphs, though the current version only uses SVG.
The repository is here, if you rewind a commit or two you get the version that flips between SVG and PNG (depending on whether a particular can be loaded).
You should be able to use the logic to show plots from either plplot or matplotlib.