load a Window

Hi,
I have a program in QT. In that program I create a tree using QTreeView. When I double click on an item in the tree, at that time I need to create a Window. I do that, and it is working. My probs is that, When I double click on an item, then it create a new window and again i double click on the same item, I need to show the old window. But in my program, it create a new window. For each time the name of the window is change ( the text of the item) How can I check the name ( the window withe a name ) is loaded?
Please help me..........

Quote:

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Originally Posted by sabeesh

Hi,
I have a program in QT. In that program I create a tree using QTreeView. When I double click on an item in the tree, at that time I need to create a Window. I do that, and it is working. My probs is that, When I double click on an item, then it create a new window and again i double click on the same item, I need to show the old window.

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Well, this doesn't have much to do with Qt. You just have to map tree-items to window-pointers in your program (initiate all the pointers to NULL). When someone double-clicks on an item, you check if the associated window-pointer is NULL (meaning: a window has not yet been created). If so, create the window. Then show the window either way.

At least, that's how I'd do it.

Quote:

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Originally Posted by sabeesh

But in my program, it create a new window. For each time the name of the window is change ( the text of the item) How can I check the name ( the window withe a name ) is loaded?

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I don't really understand what you mean here. Try my suggestion. If it doesn't help, please explain more clearly what you want your program to do.

Hi,
I have tree in my program. The nodes in the trees are 'Camera 1', 'Camera 2', 'Camera 3', etc. When I double click on the node 'Camera 1' then a window is created named as 'Camera_1', when I double click on nod 'Camera 2' then a nother window is load named as 'Camera_2' like that.....
My problem is that, When I double click on a node, 'Camera 1' at first time, then a new window is created and load name of that window is 'Camera_1' and when I double click again on that node then, another window is created named as 'Camere_1'. I want to block this. If one window is loaded, then when i double click on the same node, I need to show the old window no need to create a new one, if it is created early. ( check the name in memory)....
Please help me

See the FAQ.

Quote:

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Originally Posted by sabeesh

Hi,
I have tree in my program. The nodes in the trees are 'Camera 1', 'Camera 2', 'Camera 3', etc. When I double click on the node 'Camera 1' then a window is created named as 'Camera_1', when I double click on nod 'Camera 2' then a nother window is load named as 'Camera_2' like that.....
My problem is that, When I double click on a node, 'Camera 1' at first time, then a new window is created and load name of that window is 'Camera_1' and when I double click again on that node then, another window is created named as 'Camere_1'. I want to block this. If one window is loaded, then when i double click on the same node, I need to show the old window no need to create a new one, if it is created early. ( check the name in memory)....
Please help me

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Looks like you just repeated your question again. Seems like my suggestion would work. Is there something specific about it you don't understand?

Hi,
Can you explain how can i check, if the associated window-pointer is NULL?

Code:

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if (pointer == NULL) {
    ...
}

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Hi,
This is my function, When I double click on a node at that time this function is work,

void CreateCamWindow( QString Name, QString Title ){

CamPanel *Panel = new CamPanel;
Panel->setObjectName(Name);
Panel->setGeometry(QRect(161, 14, 250, 200));
Panel->setWindowTitle(Title);
Panel->show();
}

Here How can I check it? In the variable Name the value come as 'Camera_1'. Then, how can I check the window is loaded?

Ok, so you say the names are unique. You could do it this way:

Code:

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void CreateCamWindow( QString Name, QString Title ) {
    static QMap<QString, CamPanel*> panels;
 
    if (!panels.contains(Name)) {
        panels.insert(Name, new CamPanel);
    }
    panels[Name]->setObjectName(Name);
    panels[Name]->setGeometry(QRect(161, 14, 250, 200));
    panels[Name]->setWindowTitle(Title);
    panels[Name]->show();
}

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But that's only because I have only seen that one function. There are more elegant ways to do the same.