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Bug
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Resolution: Fixed
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Normal
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Freshly, 8.5.0, 8.5.1
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Security Level: Jimmy
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None
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problem verified in Chrome/FF/IE11/Edge
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ZK 8.5.2 S1
Steps to Reproduce
run the attached example (smooth-frozen-overlap.zul
) and use the horzontal scrollbar
Current Result
parts of the content overlap the frozen column
this happens for all 3 mesh widgets grid/listbox/tree
Expected Result
frozen columns should stay above the scrollable cells
Debug Info
the divs positioned relative/absolute overlap when scrolling to the left (and partially overlap for selected, hovered rows)
Root Cause
z-index on frozen cells has no effect without relative positioning
see: https://developer.mozilla.org/en-US/docs/Web/CSS/z-index
The z-index CSS property specifies the z-order of a positioned element and its descendants.
Workaround
adding "position: relative" to the cells and a lower "z-index:0" for the non-frozen cells works in this scenario
.z-treerow, .z-treecell,
.z-row, .z-cell,
.z-listitem, .z-listcell {
position: relative;
}
.z-treecell:not(:first-child),
.z-cell:not(:first-child),
.z-listcell:not(:first-child) {
z-index: 0;
}
