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b46a4fe286
* Google changed from an Inc to an LLC. This happened back in 2017 but we didn’t notice. Officially we should update files from Inc to LLC when they are changed as part of regular edits, but this is a nightmare to remember for the next decade. * Remove project description/titles from licenses This is no longer part of Google’s header requirements. Our existing descriptions were useless (“Visual Blocks Editor”) or grossly obselete (“Visual Blocks Language”). * License no longer requires URL. * Fix license regexps.
86 lines
2.8 KiB
JavaScript
86 lines
2.8 KiB
JavaScript
/**
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* @license
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* Copyright 2017 Google LLC
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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 Methods for dragging a flyout visually.
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* @author fenichel@google.com (Rachel Fenichel)
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*/
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'use strict';
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goog.provide('Blockly.FlyoutDragger');
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goog.require('Blockly.utils.object');
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goog.require('Blockly.WorkspaceDragger');
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/**
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* Class for a flyout dragger. It moves a flyout workspace around when it is
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* being dragged by a mouse or touch.
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* Note that the workspace itself manages whether or not it has a drag surface
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* and how to do translations based on that. This simply passes the right
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* commands based on events.
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* @param {!Blockly.Flyout} flyout The flyout to drag.
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* @extends {Blockly.WorkspaceDragger}
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* @constructor
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*/
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Blockly.FlyoutDragger = function(flyout) {
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Blockly.FlyoutDragger.superClass_.constructor.call(this,
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flyout.getWorkspace());
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/**
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* The scrollbar to update to move the flyout.
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* Unlike the main workspace, the flyout has only one scrollbar, in either the
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* horizontal or the vertical direction.
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* @type {!Blockly.Scrollbar}
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* @private
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*/
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this.scrollbar_ = flyout.scrollbar_;
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/**
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* Whether the flyout scrolls horizontally. If false, the flyout scrolls
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* vertically.
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* @type {boolean}
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* @private
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*/
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this.horizontalLayout_ = flyout.horizontalLayout_;
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};
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Blockly.utils.object.inherits(Blockly.FlyoutDragger, Blockly.WorkspaceDragger);
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/**
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* Move the flyout based on the most recent mouse movements.
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* @param {!Blockly.utils.Coordinate} currentDragDeltaXY How far the pointer has
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* moved from the position at the start of the drag, in pixel coordinates.
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* @package
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*/
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Blockly.FlyoutDragger.prototype.drag = function(currentDragDeltaXY) {
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// startScrollXY_ is assigned by the superclass.
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var newXY = Blockly.utils.Coordinate.sum(this.startScrollXY_,
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currentDragDeltaXY);
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// We can't call workspace.scroll because the flyout's workspace doesn't own
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// it's own scrollbars. This is because (as of 2.20190722.1) the
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// workspace's scrollbar property must be a scrollbar pair, rather than a
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// single scrollbar.
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// Instead we'll just expect setting the scrollbar to update the scroll of
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// the workspace as well.
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if (this.horizontalLayout_) {
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this.scrollbar_.set(-newXY.x);
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} else {
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this.scrollbar_.set(-newXY.y);
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}
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};
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