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STR #3293
| Application: | FLTK Library |
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| Status: | 5 - New |
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| Priority: | 2 - Low, e.g. a documentation error or undocumented side-effect |
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| Scope: | 3 - Applies to all machines and operating systems |
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| Subsystem: | Core Library |
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| Summary: | show_item_top() causes tree redraw position bug |
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| Version: | 1.3.4 |
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| Created By: | mikesart |
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| Assigned To: | Unassigned |
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| Fix Version: | Unassigned |
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| Update Notification: | |
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Trouble Report Files:
[ Post File ]
Trouble Report Comments:
[ Post Text ]
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| #1 | mikesart
07:37 Mar 08, 2016 |
| This is with 10304. Make the following changes to test/tree.cxx:
mikesart@mikesart-mint:~/rad/gitwin/fltk (master *)$ diff -u test/tree.cxx /tmp/tree.bug.cxx
--- test/tree.cxx 2016-03-06 17:03:25.277577418 -0800
+++ /tmp/tree.bug.cxx 2016-03-06 16:54:11.765559732 -0800
@@ -108,7 +108,7 @@
tree->add("Bbb/child-01");
tree->add("Bbb/child-01/111");
tree->add("Bbb/child-01/222");
- tree->add("Bbb/child-01/333");
+ Fl_Tree_Item *itemxx = tree->add("Bbb/child-01/333");
tree->add("Bbb/child-02");
tree->add("Bbb/child-03");
tree->add("Bbb/child-04");
@@ -216,10 +216,17 @@
sprintf(s, "500 Items/item %04d", t+1);
tree->add(s);
}
- tree->close("500 Items"); // close the 500 items by default
+ static int i = 0;
+ if ( i++ & 0x1 )
+ tree->close("500 Items"); // close the 500 items by default
+ else
+ tree->open("500 Items"); // close the 500 items by default
+
AssignUserIcons();
-
+
+ itemxx->select();
+ tree->show_item_top( itemxx );
tree->redraw();
}
When you hit the RebuildTree button, it should oscillate between a lot of items and a vertical scrollbar, and few items and no scrollbar.
When you go from few items and no scrollbar to scrollbar, it draws the ROOT item in the middle of the tree control. Screenshot attached.
Making this change in Fl_Tree.cxx fixes the issue, but I haven't gone through the code enough to know whether it's the right fix or not.
@@ -1143,6 +1148,7 @@ void Fl_Tree::clear() {
delete _root; _root = 0;
_item_focus = 0;
_lastselect = 0;
+ _vscroll->range( 0, 0 );
}
Thanks! | |
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