source: Dev/branches/rest-dojo-ui/client/dijit/themes/claro/Tree.less @ 256

/* Tree 
 * 
 * Styling Tree mostly means styling the TreeRow (dijitTreeRow)
 * There are 4 basic states to style:
 * 
 * Tree Row:
 * 1. tree row (default styling): 
 *              .dijitTreeRow - styles for each row of the tree
 *
 * 2. hovered tree row (mouse hover on a tree row)
 *              .dijitTreeRowHover - styles when mouse over on one row
 * 
 * 3. active tree row (mouse down on a tree row)
 *              .dijitTreeRowActive - styles when mouse down on one row
 * 
 * 4. selected tree row
 *              dijitTreeRowSelected - style when the row has been selected
 * 
 * Tree Expando:
 *          dijitTreeExpando - the expando at the left of the text of each tree row
 * 
 * Drag and Drop on TreeNodes: (insert line on dijitTreeContent node so it'll aligned w/ target element)
 *              .dijitTreeNode .dojoDndItemBefore/.dojoDndItemAfter - use border style simulate a separate line
 */

@import "variables";

.claro .dijitTreeNode {
    zoom: 1;    /* force layout on IE (TODO: may not be needed anymore) */
}
.claro .dijitTreeIsRoot {
    background-image: none;
}

/* Styling for basic tree node (unhovered, unselected)
 * Also use this styling when dropping between items on the tree (in other words, don't
 * use hover effect)
 */
.claro .dijitTreeRow,
.claro .dijitTreeNode .dojoDndItemBefore,
.claro .dijitTreeNode .dojoDndItemAfter {
        /* so insert line shows up on IE when dropping after a target element */
        padding: 4px 1px 2px 0;
        margin: 0 1px;  /* replaced by border for selected/hovered row */

        background-color: none; // IE6 doesn't understand rgba() or transparent below
        background-color: transparent;  // IE8 doesn't understand rgba() below
        background-color: rgba(171,214,255,0);  // rgba() instead of transparent to prevent flash on hover fade-in
        background-position:0 0;
        background-repeat:repeat-x;

        border-color: rgba(118,157,192,0);      // rgba() instead of none to prevent flash on hover fade-in
        border-width: 0;

        color: @text-color;

        .transition-property(background-color, border-color);
        .transition-duration(.25s);
        .transition-timing-function(ease-out);
}

.claro .dijitTreeRowSelected {
        background-repeat:repeat-x;
        background-color:@selected-background-color;
        background-image: url(@image-common-highlight);
        padding: 3px 0 1px;
        margin: 0;
        border:solid 1px @selected-border-color;
        color:@selected-text-color;
}
.claro .dijitTreeRowHover {
        background-color:@hovered-background-color;
        background-image: url(@image-common-highlight);
        padding: 3px 0 1px;
        margin: 0;
        border:solid 1px @hovered-border-color;
        color:@hovered-text-color;
        .transition-duration(.25s);
}
.claro .dijitTreeRowActive {
        background-color:@pressed-background-color;
        background-image: url(@image-common-highlight);
        background-position:0 -177px;
        padding: 3px 0 1px;
        margin-left: 0;
        border:solid 1px @pressed-border-color;
        color:@selected-text-color;
}
.dj_ie6 .claro .dijitTreeRow {
        background-image: none;
}
.claro .dijitTreeRowFocused {
        background-repeat: repeat;
}

/* expando (open/closed) icon */

.claro .dijitTreeExpando {
        background-image: url(@image-tree-expand);
    width: 16px;
    height: 16px;
        background-position: -35px 0;           /* for dijitTreeExpandoOpened */
}
.dj_ie6 .claro .dijitTreeExpando {
        background-image: url(@image-tree-expand-ie6);
}
.claro .dijitTreeRowHover .dijitTreeExpandoOpened {
        background-position: -53px 0;
}
.claro .dijitTreeExpandoClosed {
        background-position: 1px 0;
}
.claro .dijitTreeRowHover .dijitTreeExpandoClosed {
        background-position: -17px 0;
}
.claro .dijitTreeExpandoLeaf,
.dj_ie6 .claro .dijitTreeExpandoLeaf {
        background-image:none;
}
.claro .dijitTreeExpandoLoading {
        background-image: url(@image-loading-animation);
}

/* Drag and Drop on TreeNodes
 * Put insert line on dijitTreeContent node so it's aligned w/
 * (ie, indented equally with) target element, even
 * though dijitTreeRowNode is the actual "drag object"
 */
.claro .dijitTreeNode .dojoDndItemBefore .dijitTreeContent {
        border-top: 2px solid @dnd-dropseparator-color;         // TODO: normal separator is just 1px, why is this 2px?
}
.claro .dijitTreeNode .dojoDndItemAfter .dijitTreeContent {
        border-bottom: 2px solid @dnd-dropseparator-color;      // TODO: normal separator is just 1px, why is this 2px?
}