Hi all
Please tell me can we use both concept of Subclass and connections (Signals and Slots ) together . If yes then How ? Explain with an example.
Thanx and Regards
merry
Hi all
Please tell me can we use both concept of Subclass and connections (Signals and Slots ) together . If yes then How ? Explain with an example.
Thanx and Regards
merry
What do you meanPlease tell me can we use both concept of Subclass and connections (Signals and Slots ) together.
We are not giving any testIf yes then How ? Explain with an example.
We can't solve problems by using the same kind of thinking we used when we created them
Mr Sunil
I Know U people are not giving anykind of test.
I just simply asked u people that can we use connections and Subclassing together becoz
I didnt know about this if u people know about this then tell me , dats it.
merry
I'm just like Sunil, I don't understand your request...
Explain with a little example
Hi
Exactly My Problem is that
I am having a treeStructure of Files and Folders and I had represented files and folders with different different images.
Foreg.
now when i pressed any File or Folder it can be replaced by another image likeFiles are represented by Fileunchecked.png
Folders are represented by Folderunchecked.png
For this I used the concept of Connections using Signals and SlotsFileunchecked.png is replaced by Filechecked.png
and
Folderunchecked.png is replaced by Folderchecked.png
By using this the images are changed.connect(listView,SIGNAL(pressed(QListViewItem*)),t his,SLOT(reverse_images(QListViewItem*)));
But now I want when I again Click on any File or Folder (that are checked) can be replaced by File or Folder (that are unchecked)
That is
Actually i want to flip the image back to the one that was there before. For this I want to use the concept of Subclassing. But I dont know how to use. If you understand my Problem then Please tell me How can I use Subclassing for this.Hope You can understand what I want to say.Filechecked.png is replaced by Fileunchecked.png
and
Folderchecked.png is replaced by Folderunchecked.png
Why do you want to use Subclassing for this. ? reverse_images can check the state of the item passes and toggle the images.
We can't solve problems by using the same kind of thinking we used when we created them
This thread is related to this one:
http://www.qtcentre.org/forum/f-qt-p...ages-5835.html
I really suggest to learn a little of C++ before starting with Qt...
Merry - in practice you can't use signal/slot connections without subclassing as all classes that use signals and slots inherit QObject class which implements signals and slots mechanism. So to answer your question - yes, it is possible to both subclass and use signals and slots. Still, I suggest to read a little about inheritance and polymorphism.
merry (6th March 2007)
yaa
WySota I know little about C++ and also know About inheritance but dont Know How to implement it in Qt.
Wysota I just want to make u request that please help me in learning Qt.
I m a beginner in Qt and know very little about Qt.
Thanx merry
You don't "implement" inheritance in Qt - inheritance is part of the C++ language - just use it.
Your problem is C++, not Qt. Did you take a look at Johan's Independent Qt Tutorial?Wysota I just want to make u request that please help me in learning Qt.
I m a beginner in Qt and know very little about Qt.
Thanx
Now i ll try to first learn C++ and Then Qt
merry
Take a look at the tutorial I mentioned. Some things should become clear when you do.
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