Hi, a little addition to Wolfgang post. It is the combination of panel handle and control ID that is unique: as you may know, you can load the same panel more than once so even if you happen to retrieve the complete string PANEL_CONTROL you have some duplications; the elements that exactly identifies some particular control in some particular panel are the combination of panel handle AND panel_control ID.
On one hand this guarantees more flexibility to your application, since you may design only a few panels and reuse them every time you need, even having some of them loded multiple times in the same moment. On the other hand, as you have discovered, there is the possibility (well, almost the certainty) of duplicated IDs in your application.
To deal with the problem of duplicated IDs you may act two ways:
1. If you know that no panel is never loaded multiple timer in your application you can retrieve the panel constant name with GetPanelAttribute (panelHandle, ATTR_CONSTANT_NAME, string); and discriminate between constant name, then switch between control IDs
2. If you happen to have panels duplicated you need to store each panelHandles in non-volatile variables, switch between them and afterwards switch between control IDs
An alternative could be to use panel callbackData attribute and assign some meaningful value to it when loading the panel, switch between callbackData and finally switch between control IDs. Something like this:
When loading panels:
panelHandle = LoadPanel (0, "myfile.uir", PANEL1);
SetPanelAttribute (panelHandle, ATTR_CALLBACK_DATA, (void *)1); // Assign different callbackData to each instance
When switching between controls:
void *cbkd;
GetPanelAttribute (panelHandle, ATTR_CALLBACK_DATA, &cbkd);
switch ((int)cbkd) {
case 1: // Elements of PANEL1
switch (control) {
case PANEL1_NUMERIC:
// your code here
break;
case PANEL1_STRING:
// your code here
break;
}
break;
case 2:
// .....
break;
}
One final note: it seems to me that all this is necessary in a very limited situation, in which you have the same callback called on different panels/controls. Every time the callback is unique to a specific panel or to controls on a single panel you have no need to operate this way.
GetPanelAttribute (panelHandle, ATTR_CONSTANT_NAME, string);GetPanelAttribute (panelHandle, ATTR_CONSTANT_NAME, string);
