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90 lines
2.5 KiB
JavaScript
90 lines
2.5 KiB
JavaScript
/**
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* Visual Blocks Editor
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*
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* Copyright 2013 Google Inc.
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* http://blockly.googlecode.com/
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @fileoverview A div that floats on top of Blockly. This singleton contains
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* temporary HTML UI widgets that the user is currently interacting with.
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* E.g. text input areas, colour pickers.
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* @author fraser@google.com (Neil Fraser)
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*/
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'use strict';
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goog.provide('Blockly.WidgetDiv');
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goog.require('Blockly.Css');
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goog.require('goog.dom');
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/**
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* The HTML container. Set once by inject.js's Blockly.createDom_.
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* @type Element
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*/
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Blockly.WidgetDiv.DIV = null;
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/**
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* The field currently using this container.
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* @private
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* @type Blockly.Field
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*/
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Blockly.WidgetDiv.field_ = null;
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/**
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* Optional cleanup function set by whichever field uses the widget.
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* @private
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* @type Function
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*/
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Blockly.WidgetDiv.dispose_ = null;
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/**
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* Initialize and display the widget div. Close the old one if needed.
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* @param {!Blockly.Field} newField The field that will be using this container.
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* @param {Function} dispose Optional cleanup function to be run when the widget
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* is closed.
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*/
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Blockly.WidgetDiv.show = function(newField, dispose) {
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Blockly.WidgetDiv.hide();
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Blockly.WidgetDiv.field_ = newField;
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Blockly.WidgetDiv.dispose_ = dispose;
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Blockly.WidgetDiv.DIV.style.display = 'block';
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};
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/**
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* Destroy the widget and hide the div.
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*/
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Blockly.WidgetDiv.hide = function() {
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if (Blockly.WidgetDiv.field_) {
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Blockly.WidgetDiv.DIV.style.display = 'none';
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Blockly.WidgetDiv.dispose_ && Blockly.WidgetDiv.dispose_();
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Blockly.WidgetDiv.field_ = null;
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Blockly.WidgetDiv.dispose_ = null;
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goog.dom.removeChildren(Blockly.WidgetDiv.DIV);
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}
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};
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/**
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* Destroy the widget and hide the div if it is being used by the specified
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* field.
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* @param {!Blockly.Field} oldField The field that was using this container.
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*/
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Blockly.WidgetDiv.hideIfField = function(oldField) {
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if (Blockly.WidgetDiv.field_ == oldField) {
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Blockly.WidgetDiv.hide();
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}
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};
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