scratch – Rev 84
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DrawingBoard.Control.Navigation = DrawingBoard.Control.extend({
name: 'navigation',
defaults: {
back: true,
forward: true,
reset: true
},
initialize: function() {
var el = '';
if (this.opts.back) el += '<button class="drawing-board-control-navigation-back">←</button>';
if (this.opts.forward) el += '<button class="drawing-board-control-navigation-forward">→</button>';
if (this.opts.reset) el += '<button class="drawing-board-control-navigation-reset">×</button>';
this.$el.append(el);
if (this.opts.back) {
var $back = this.$el.find('.drawing-board-control-navigation-back');
this.board.ev.bind('historyNavigation', $.proxy(this.updateBack, this, $back));
this.$el.on('click', '.drawing-board-control-navigation-back', $.proxy(function(e) {
this.board.goBackInHistory();
e.preventDefault();
}, this));
this.updateBack($back);
}
if (this.opts.forward) {
var $forward = this.$el.find('.drawing-board-control-navigation-forward');
this.board.ev.bind('historyNavigation', $.proxy(this.updateForward, this, $forward));
this.$el.on('click', '.drawing-board-control-navigation-forward', $.proxy(function(e) {
this.board.goForthInHistory();
e.preventDefault();
}, this));
this.updateForward($forward);
}
if (this.opts.reset) {
this.$el.on('click', '.drawing-board-control-navigation-reset', $.proxy(function(e) {
this.board.reset({ background: true });
e.preventDefault();
}, this));
}
},
updateBack: function($back) {
if (this.board.history.canUndo()) {
$back.removeAttr('disabled');
} else {
$back.attr('disabled', 'disabled');
}
},
updateForward: function($forward) {
if (this.board.history.canRedo()) {
$forward.removeAttr('disabled');
} else {
$forward.attr('disabled', 'disabled');
}
}
});
Generated by GNU Enscript 1.6.5.90.