| Title |
Images used in a PtTree widget behaviour |
| Ref. No. |
QNX.000009888 |
| Category(ies) |
Development |
| Issue |
When clicking on an item in the PtTree widget, the image always changes to the off image.
Why?
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| Solution |
For each tree item, you have to provide two images: one image which will be displayed when the tree item is not selected(unsel_index) and one image which will be displayed when the item is selected(sel_index)- usually, the sel_index image will be the same as unsel_index image, but will be filled with the color of Pt_ARG_SELECTION_FILL_COLOR). You might need 4 images:
x09- sel_index_on
x09- unsel_index_on
x09- sel_index_off
x09- unsel_index_off.
When you call PtTreeItemAlloc use:
x09item_on = PtTreeItemAlloc(ABW_tree, string_on, sel_index_on, unsel_index_on);
x09item_off = PtTreeItemAlloc(ABW_tree, string_off, sel_index_off, unsel_index_off);
When you call PtTreeModifyItem use:
x09item_on = PtTreeItemAlloc(ABW_tree,tree_item, NULL, sel_index_on, unsel_index_on);
x09item_off = PtTreeItemAlloc(ABW_tree,tree_item, NULL, sel_index_off, unsel_index_off);
Do not mix index_on and index_off in the same call to PrTreeAllocation.
Pf course you might choose to have only two images: index_on and index_off and use:
x09item_on = PtTreeItemAlloc(ABW_tree, string_on, index_on, unsel_index_on);
x09item_off = PtTreeItemAlloc(ABW_tree, string_off, index_off, unsel_index_off);
In this case the image will not change at all when you select an item.
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