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* More WIP on VM redesign

This commit is contained in:
Bryan Ashby 2015-05-06 16:43:49 -06:00
parent cdfb7ce6f2
commit 0346cbc7cb
1 changed files with 47 additions and 15 deletions
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62
core/vertical_menu_view.js
View File

@ -21,20 +21,23 @@ function VerticalMenuView(options) {
//
// :TODO: view.setDimens() would set autoSize to false. Otherwise, we cna scale @ setItems()
// topViewIndex = top visibile item
// topViewIndex = top visible item
// itemsInView = height * (1 + itemSpacing)
this.updateViewable = function() {
var viewableItems = self.dimens.height / ((self.itemSpacing + 1) - self.itemSpacing);
console.log(viewableItems)
this.viewableRange = {
top : self.focusedItemIndex,
bottom : viewableItems - self.focusedItemIndex,
this.jumpVisibleToTop = function() {
this.visibleRange = {
top : 0,
bottom : this.maxVisibleItems,
};
console.log(this.viewableRange)
};
this.jumpVisibleToBottom = function() {
this.visibleRange = {
top : this.items.length - this.jumpVisibleToTop,
bottom : this.items.length,
};
};
this.scaleDimension = function() {
if(this.autoScale) {
this.dimens.height = (self.items.length * (self.itemSpacing + 1)) - (self.itemSpacing);
@ -76,7 +79,7 @@ console.log(viewableItems)
this.cacheVisiblePositions = function() {
if(self.positionCacheExpired) {
var x = self.position.x;
for(var i = this.viewableRange.top; i < this.viewableRange.bottom; ++i) {
for(var i = this.visibleRange.top; i < this.visibleRange.bottom; ++i) {
if(i > 0) {
x += self.itemSpacing + 1;
}
@ -108,6 +111,33 @@ console.log(viewableItems)
}
};
this.changeSelection2 = function(fromIndex, toIndex) {
assert(!self.positionCacheExpired);
assert(fromIndex >= 0 && fromIndex <= self.items.length);
assert(toIndex >= 0 && toIndex <= self.items.length);
if(fromIndex === self.items.length - 1 && fromIndex > toIndex) {
console.log('jump to top')
this.redraw();
return;
} else if(0 === fromIndex && toIndex > fromIndex) {
console.log('jump to bottom')
this.redraw();
return;
}
/*if(fromIndex > toIndex && self.items.length === fromIndex) {
console.log('jump to top')
this.jumpVisibleToTop();
} else if(0 === fromIndex && fromIndex < toIndex) {
console.log('jump to bottom')
this.jumpVisibleToBottom();
}*/
};
this.changeSelection = function(fromIndex, toIndex) {
assert(!self.positionCacheExpired);
assert(fromIndex >= 0 && fromIndex <= self.items.length);
@ -142,10 +172,9 @@ console.log(viewableItems)
util.inherits(VerticalMenuView, MenuView);
VerticalMenuView.prototype.redraw = function() {
//VerticalMenuView.super_.prototype.redrawAllItems.call(this);
VerticalMenuView.super_.prototype.redraw.call(this);
for(var i = this.viewableRange.top; i < this.viewableRange.bottom; ++i) {
for(var i = this.visibleRange.top; i < this.visibleRange.bottom; ++i) {
this.items[i].focused = this.focusedItemIndex === i;
this.drawItem(i);
}
@ -163,7 +192,6 @@ VerticalMenuView.prototype.setFocus = function(focused) {
this.redraw();
};
VerticalMenuView.prototype.onSpecialKeyPress = function(keyName) {
var prevFocusedItemIndex = this.focusedItemIndex;
@ -184,6 +212,8 @@ VerticalMenuView.prototype.onSpecialKeyPress = function(keyName) {
if(prevFocusedItemIndex !== this.focusedItemIndex) {
this.changeSelection(prevFocusedItemIndex, this.focusedItemIndex);
this.changeSelection2(prevFocusedItemIndex, this.focusedItemIndex);
}
VerticalMenuView.super_.prototype.onSpecialKeyPress.call(this, keyName);
@ -200,5 +230,7 @@ VerticalMenuView.prototype.setItems = function(items) {
this.cachePositions();
this.scaleDimension();
this.updateViewable();
this.maxVisibleItems = this.dimens.height / (this.itemSpacing + 1);
this.jumpVisibleToTop();
};