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Fixes for GenericDisplay

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GenericDisplay wasn't quite completely converted to the ShellOverflowList
model.  Since the list now holds all actors, the indexing/wrapping
was incorrect.

Add a property which lets us keep track of how many items are displayed,
use this in genericDisplay.

Avoid setting selectedIndex to -2 when going up with no items.

If we're not displaying any results at all, don't attempt keynav (for now).
This commit is contained in:
Colin Walters
2009-07-11 12:26:36 -04:00
parent f7a82d6400
commit 2161e90cda
4 changed files with 104 additions and 24 deletions
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39
js/ui/genericDisplay.js
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@ -351,7 +351,6 @@ GenericDisplay.prototype = {
this._matchedItems = [];
// map<itemId, GenericDisplayItem>
this._displayedItems = {};
this._displayedItemsCount = 0;
this._selectedIndex = -1;
// These two are public - .actor is the normal "actor subclass" property,
// but we also expose a .displayControl actor which is separate.
@ -397,10 +396,11 @@ GenericDisplay.prototype = {
// to the bottom one. Returns true if the selection actually moved up, false if it wrapped
// around to the bottom.
selectUp: function() {
let count = this._list.displayedCount;
let selectedUp = true;
let prev = this._selectedIndex - 1;
if (this._selectedIndex <= 0) {
prev = this._displayedItemsCount - 1;
prev = count - 1;
selectedUp = false;
}
this._selectIndex(prev);
@ -411,9 +411,10 @@ GenericDisplay.prototype = {
// to the top one. Returns true if the selection actually moved down, false if it wrapped
// around to the top.
selectDown: function() {
let count = this._list.displayedCount;
let selectedDown = true;
let next = this._selectedIndex + 1;
if (this._selectedIndex == this._displayedItemsCount - 1) {
if (this._selectedIndex == count - 1) {
next = 0;
selectedDown = false;
}
@ -429,8 +430,9 @@ GenericDisplay.prototype = {
// Selects the last item among the displayed items.
selectLastItem: function() {
let count = this._list.displayedCount;
if (this.hasItems())
this._selectIndex(this._displayedItemsCount - 1);
this._selectIndex(count - 1);
},
// Returns true if the display has some item selected.
@ -445,7 +447,7 @@ GenericDisplay.prototype = {
// Returns true if the display has any displayed items.
hasItems: function() {
return this._displayedItemsCount > 0;
return this._list.displayedCount > 0;
},
// Updates the displayed items and makes the display actor visible.
@ -541,15 +543,15 @@ GenericDisplay.prototype = {
}));
this._list.add_actor(displayItem.actor);
this._displayedItems[itemId] = displayItem;
this._displayedItemsCount++;
},
// Removes an item identifed by the itemId from the displayed items.
_removeDisplayItem: function(itemId) {
let count = this._list.displayedCount;
let displayItem = this._displayedItems[itemId];
let displayItemIndex = this._getIndexOfDisplayedActor(displayItem.actor);
if (this.hasSelected() && (this._displayedItemsCount == 1 || !this._list.visible)) {
if (this.hasSelected() && (count == 1 || !this._list.visible)) {
this.unsetSelected();
} else if (this.hasSelected() && displayItemIndex < this._selectedIndex) {
this.selectUp();
@ -558,7 +560,6 @@ GenericDisplay.prototype = {
displayItem.destroy();
delete this._displayedItems[itemId];
this._displayedItemsCount--;
},
// Removes all displayed items.
@ -707,6 +708,7 @@ GenericDisplay.prototype = {
*/
_updateDisplayControl: function(resetDisplayControl) {
if (resetDisplayControl) {
this._selectedIndex = -1;
this.displayControl.remove_all();
let nPages = this._list.n_pages;
let pageNumber = this._list.page;
@ -744,8 +746,7 @@ GenericDisplay.prototype = {
// Returns a display item based on its index in the ordering of the
// display children.
_findDisplayedByIndex: function(index) {
let displayedActors = this._list.get_children();
let actor = displayedActors[index];
let actor = this._list.get_displayed_actor(index);
return this._findDisplayedByActor(actor);
},
@ -775,7 +776,8 @@ GenericDisplay.prototype = {
// Selects (e.g. highlights) a display item at the provided index,
// updates this.selectedItemDetails actor, and emits 'selected' signal.
_selectIndex: function(index) {
if (this._selectedIndex != -1) {
let count = this._list.displayedCount;
if (this._selectedIndex >= 0) {
let prev = this._findDisplayedByIndex(this._selectedIndex);
prev.markSelected(false);
// Calling destroy() gets large image previews released as quickly as
@ -787,12 +789,15 @@ GenericDisplay.prototype = {
this.selectedItemDetails.remove_all();
}
this._selectedIndex = index;
if (index != -1 && index < this._displayedItemsCount) {
let item = this._findDisplayedByIndex(index);
item.markSelected(true);
this.selectedItemDetails.append(item.createDetailsActor(this._availableWidthForItemDetails, this._availableHeightForItemDetails), Big.BoxPackFlags.NONE);
this.emit('selected');
if (index < count) {
this._selectedIndex = index;
if (index >= 0) {
let item = this._findDisplayedByIndex(index);
item.markSelected(true);
this.selectedItemDetails.append(item.createDetailsActor(this._availableWidthForItemDetails,
this._availableHeightForItemDetails), Big.BoxPackFlags.NONE);
this.emit('selected');
}
}
}
};