I wrote almost every sort algorithm in C++ in console. Now I would like to make it look good, so what classes of Qt should I use to make an animation of sorting algorithms I implemented in pure C++? Im a newbie in Qt ;) tia
You can use QGraphicsItemAnimation to animate graphics displayed using QGraphicsScene and QGraphicsView.
Links:
Graphics View Framework
QGraphicsItemAnimation
Outside of the Graphics View Framework, you can use QVariantAnimation or QPropertyAnimation to drive properties or methods of any QObject derived class. See the Animation Framework docs for more info.
Conversely you can manually configure a QTimer to drive painting updates of a widget and use an increment to drive a QTimeLine.
Related
I'm looking to make a sprite animation editor. I have the loading of my custom animation file done but now need to get the actual ui started. I'm really just stuck on what widgets I would use to actually play my animation. I need to be able to go to certain frame, play, pause, loop, etc. Once I'm done with the viewing portion I plan on adding in the editing.
I've seen AnimatedSprite in qt docs but that seems to only allow playback of sprites in the same file. In my situation sprites can be from multiple image files and sometimes doesn't follow a grid like sprite cutter.
First of all, you should decide whether you want to use QML or Widgets. AnimatedSprite is QML related class. All widget-related classes starts with "Q" letter.
If you decide to use Qt Widgets, I would recommend to take a look at Qt Animation Framework in combination with Qt Graphics View Framework. Most likely it will not let you do everything you want out of box, but it should provide you with a rich set of useful tools.
If you need here are some examples.
Hope it helps.
Have a look at QMovie. This class may provide all the methods you need, as long as you only want to use it for viewing. The QMovie can be passed to a QLabel to show the animation.
QMovie however supports only gif out of the box (and there is a third party plugin for apng files). You would probably have to create your own image handle plugin to support your format.
If thats not applicable or to complicated, you will most likely have to create your own custom widget. Have a look at the painter example. Playing an animation is not that hard if you have all the frames. A simple QTimer to change the image to be drawn in a constant rate should work.
I would like to exercise programming software with non-standard graphical interfaces such as the ones in the following images. I know how to create a GUI using basic widgets, but I have no idea on how to create my own custom widgets. I am familiar with GTK 3.0 and Qt. The GTK tutorial, for instance, has a link on how to do custom drawing. I just don't know if this is the usual and correct way to create custom widgets. There's also things such as: selections, mouse handling, zoom, scrolling, animations and so on that tutorials do not teach.
So here is my question: what kind of documentation, keywords, tutorials and algorithms should I look for? For my first project, I would like to start with something similar to the first and second images below. My current knowledge is C/C++ and Qt and GTK, but I can learn new languages and tools if necessary.
http://hobby-electrons.sourceforge.net/tutorials/gEDA/simple-schematic-in-gschem.png
http://www.cburch.com/logisim/docs/2.7/pt/html/images/screen-shot.png
http://eeweb.poly.edu/labs/nanovlsi/tutorials/soctutorials/figures/ENCFinalDesign.gif
http://www.ccm.ece.vt.edu:8088/etextiles/projects/arch_images/simulation.jpg
http://j-algo.binaervarianz.de/images/avl_avltest.png
The Qt Graphics view Framework is what you should use if you go with Qt. There are several examples covering the basics of creating components.
To be able to mimic those samples, most of the work is going to be on implementing custom graphic view items. Like widgets it means providing a paint method, specialized event handlers and properties.
I have created a C++ Qt class, inheriting from QWidget. I have also created a QML file, which runs as my main, and I want in some point of the program to open another separated window containing this widget.
The point is to draw line graphs in QML, and I don't quite understand how to do it.
First of all, take a look at this question and its answers: Qt5. Embed QWidget object in QML
You got into XY-problem. You do not need to embed QWidget to your QtQuick/QML application. (I hope) You can easily deal with your task using only QML. For example, there is Canvas Element that can help you to organize drawing. Take a look at tutorial related to Canvas in QmlBook.
Hope this helps!
i wanna make some nice user interface, but still using just classic ui elements from Qt.
For instance i have 2 forms and i wanna make some transition between them. For instance rotate first ui screen and make it disappear. It's possible in some way to use shader? Is any way how to do complex ui animations with classic ui elements?
Qt has a whole animation framework. It works on both the QML widgets and for the classic UI elements that you're using. There's some examples of use here, that should be able to get you started.
The simplest way to do it would be to use the Qt Declarative a.k.a. Qt Quick 1. It's based on QGraphicsScene, with the latter offering a reasonable way of integrating legacy widgets. It'll be likely the simplest way to offer animations with widgets.
You may wish to see an overview of GUI technologies available in Qt 5, to see how Qt Quick 1 fits in.
I have a library proving me a QGLWidget, and the interface allow me to only to resize/set size, and control some GL animation; but no GL command is exposed outside, all i do it initialize GLWidget, and then pass the context to library and later call swap buffer to show animation..
I want to integrate this QGLWidget library into QML, is it possible to hove a QGLWidget inside QML ? if yes how ?
It's totally possible! You can write a QML plugin that will define a new QML element to encapsulate the library.
Then you will import this plugin from the QML document and you'll be good to use the new element and harness the features that the library offers.
Tip: if the application that loads your QML document was setup to have it's on QGLWidget, then you won't need to create a new QGLWidget inside your plugin. I did this mistake once.
This blog post shows how to create a simple/new QML element from scratch and how to use it in a QML document.
QGLWidget derives from the QWidget while QML widgets are implemented as QDeclarativeItem which derives from QGraphicsObject and these two are to different worlds.
Possible way of doing OpenGL drawings in a QML item is to declare a new QDeclarativeItem, expose it to the QML system and then override the draw method of this QDeclarativeItem subclass to do native painting(by calling the beginNativePainting and endNativePainting of the QPainter instance provided in the draw method).
Have a look at these two links:
http://doc.qt.nokia.com/4.7-snapshot/qml-extending.html
http://developer.qt.nokia.com/forums/viewthread/4109