QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
Unblocking modal dialog |
| Ref. No. |
QNX.000009886 |
| Category(ies) |
Development |
| Issue |
We have a modal dialog open and when the user clicks on a button, another modal dialog is brought up. When user is done with this dialog, it clicks done or cancel which causes all application windows to unblock.
This includes the first dialog, which was blocked and should stay blocked.
How do we solve this problem?
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| Solution |
When you create a modal dialog, 'B' from another modal dialog 'A', you know that all other windows are already blocked, so only dialog 'A' should be unblocked when dialog 'B' is unblocked. Do not unblock anything else.
The alternative is to tack on something to 'user_data' of all things you block, keeping a block count.
When unblocking, decrement this counter, and when it goes to 0, unblock and change the cursor and cursor override of the widget into question.
You need to block the parent dialog of the new dialog and unblock its parent when the new dialog goes away. |
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