scratch-blocks/core/flyout_vertical.js
2020-05-22 22:58:37 -04:00

770 lines
26 KiB
JavaScript

/**
* @license
* Visual Blocks Editor
*
* Copyright 2017 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Layout code for a vertical variant of the flyout.
* @author fenichel@google.com (Rachel Fenichel)
*/
'use strict';
goog.provide('Blockly.VerticalFlyout');
goog.require('Blockly.Block');
goog.require('Blockly.Comment');
goog.require('Blockly.Events');
goog.require('Blockly.Flyout');
goog.require('Blockly.FlyoutButton');
goog.require('Blockly.utils');
goog.require('Blockly.WorkspaceSvg');
goog.require('goog.dom');
goog.require('goog.dom.animationFrame.polyfill');
goog.require('goog.events');
goog.require('goog.math.Rect');
goog.require('goog.userAgent');
/**
* Class for a flyout.
* @param {!Object} workspaceOptions Dictionary of options for the workspace.
* @extends {Blockly.Flyout}
* @constructor
*/
Blockly.VerticalFlyout = function(workspaceOptions) {
workspaceOptions.getMetrics = this.getMetrics_.bind(this);
workspaceOptions.setMetrics = this.setMetrics_.bind(this);
Blockly.VerticalFlyout.superClass_.constructor.call(this, workspaceOptions);
/**
* Flyout should be laid out vertically.
* @type {boolean}
* @private
*/
this.horizontalLayout_ = false;
/**
* Map of checkboxes that correspond to monitored blocks.
* Each element is an object containing the SVG for the checkbox, a boolean
* for its checked state, and the block the checkbox is associated with.
* @type {!Object.<string, !Object>}
* @private
*/
this.checkboxes_ = {};
};
goog.inherits(Blockly.VerticalFlyout, Blockly.Flyout);
/**
* Does the flyout automatically close when a block is created?
* @type {boolean}
*/
Blockly.VerticalFlyout.prototype.autoClose = false;
/**
* The width of the flyout, if not otherwise specified.
* @type {number}
*/
Blockly.VerticalFlyout.prototype.DEFAULT_WIDTH = 250;
/**
* Size of a checkbox next to a variable reporter.
* @type {number}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE = 25;
/**
* Amount of touchable padding around reporter checkboxes.
* @type {number}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKBOX_TOUCH_PADDING = 12;
/**
* SVG path data for checkmark in checkbox.
* @type {string}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKMARK_PATH =
'M' + Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE / 4 +
' ' + Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE / 2 +
'L' + 5 * Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE / 12 +
' ' + 2 * Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE / 3 +
'L' + 3 * Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE / 4 +
' ' + Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE / 3;
/**
* Size of the checkbox corner radius
* @type {number}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKBOX_CORNER_RADIUS = 5;
/**
* Space above and around the checkbox.
* @type {number}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKBOX_MARGIN = Blockly.Flyout.prototype.MARGIN;
/**
* Total additional width of a row that contains a checkbox.
* @type {number}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKBOX_SPACE_X =
Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE +
2 * Blockly.VerticalFlyout.prototype.CHECKBOX_MARGIN;
/**
* Initializes the flyout.
* @param {!Blockly.Workspace} targetWorkspace The workspace in which to create
* new blocks.
*/
Blockly.VerticalFlyout.prototype.init = function(targetWorkspace) {
Blockly.VerticalFlyout.superClass_.init.call(this, targetWorkspace);
this.workspace_.scale = targetWorkspace.scale;
};
/**
* Creates the flyout's DOM. Only needs to be called once.
* @param {string} tagName HTML element
* @return {!Element} The flyout's SVG group.
*/
Blockly.VerticalFlyout.prototype.createDom = function(tagName) {
Blockly.VerticalFlyout.superClass_.createDom.call(this, tagName);
/*
<defs>
<clipPath id="blocklyBlockMenuClipPath">
<rect id="blocklyBlockMenuClipRect" height="1147px"
width="248px" y="0" x="0">
</rect>
</clipPath>
</defs>
*/
this.defs_ = Blockly.utils.createSvgElement('defs', {}, this.svgGroup_);
var clipPath = Blockly.utils.createSvgElement('clipPath',
{'id':'blocklyBlockMenuClipPath'}, this.defs_);
this.clipRect_ = Blockly.utils.createSvgElement('rect',
{
'id': 'blocklyBlockMenuClipRect',
'height': '0',
'width': '0',
'y': '0',
'x': '0'
},
clipPath);
this.workspace_.svgGroup_.setAttribute(
'clip-path', 'url(#blocklyBlockMenuClipPath)');
return this.svgGroup_;
};
/**
* Calculate the bounding box of the flyout.
*
* @return {Object} Contains the position and size of the bounding
* box containing the elements (blocks, buttons, labels) in the flyout.
*/
Blockly.VerticalFlyout.prototype.getContentBoundingBox_ = function() {
var contentBounds = this.workspace_.getBlocksBoundingBox();
var bounds = {
xMin: contentBounds.x,
yMin: contentBounds.y,
xMax: contentBounds.x + contentBounds.width,
yMax: contentBounds.y + contentBounds.height
};
// Check if any of the buttons/labels are outside the blocks bounding box.
for (var i = 0; i < this.buttons_.length; i ++) {
var button = this.buttons_[i];
var buttonPosition = button.getPosition();
if (buttonPosition.x < bounds.xMin) {
bounds.xMin = buttonPosition.x;
}
if (buttonPosition.y < bounds.yMin) {
bounds.yMin = buttonPosition.y;
}
// Button extends past the bounding box to the right.
if (buttonPosition.x + button.width > bounds.xMax) {
bounds.xMax = buttonPosition.x + button.width;
}
// Button extends past the bounding box on the bottom
if (buttonPosition.y + button.height > bounds.yMax) {
bounds.yMax = buttonPosition.y + button.height;
}
}
return {
x: bounds.xMin,
y: bounds.yMin,
width: bounds.xMax - bounds.xMin,
height: bounds.yMax - bounds.yMin,
};
};
/**
* Return an object with all the metrics required to size scrollbars for the
* flyout. The following properties are computed:
* .viewHeight: Height of the visible rectangle,
* .viewWidth: Width of the visible rectangle,
* .contentHeight: Height of the contents,
* .contentWidth: Width of the contents,
* .viewTop: Offset of top edge of visible rectangle from parent,
* .contentTop: Offset of the top-most content from the y=0 coordinate,
* .absoluteTop: Top-edge of view.
* .viewLeft: Offset of the left edge of visible rectangle from parent,
* .contentLeft: Offset of the left-most content from the x=0 coordinate,
* .absoluteLeft: Left-edge of view.
* @return {Object} Contains size and position metrics of the flyout.
* @private
*/
Blockly.VerticalFlyout.prototype.getMetrics_ = function() {
if (!this.isVisible()) {
// Flyout is hidden.
return null;
}
var optionBox = this.getContentBoundingBox_();
// Padding for the end of the scrollbar.
var absoluteTop = this.SCROLLBAR_PADDING;
var absoluteLeft = 0;
var viewHeight = this.height_ - 2 * this.SCROLLBAR_PADDING;
var viewWidth = this.getWidth() - this.SCROLLBAR_PADDING;
// Add padding to the bottom of the flyout, so we can scroll to the top of
// the last category.
var contentHeight = optionBox.height * this.workspace_.scale;
this.recordCategoryScrollPositions_();
var bottomPadding = this.MARGIN;
if (this.categoryScrollPositions.length > 0) {
var lastLabel = this.categoryScrollPositions[
this.categoryScrollPositions.length - 1];
var lastPos = lastLabel.position * this.workspace_.scale;
var lastCategoryHeight = contentHeight - lastPos;
if (lastCategoryHeight < viewHeight) {
bottomPadding = viewHeight - lastCategoryHeight;
}
}
var metrics = {
viewHeight: viewHeight,
viewWidth: viewWidth,
contentHeight: contentHeight + bottomPadding,
contentWidth: optionBox.width * this.workspace_.scale + 2 * this.MARGIN,
viewTop: -this.workspace_.scrollY + optionBox.y,
viewLeft: -this.workspace_.scrollX,
contentTop: optionBox.y,
contentLeft: optionBox.x,
absoluteTop: absoluteTop,
absoluteLeft: absoluteLeft
};
return metrics;
};
/**
* Sets the translation of the flyout to match the scrollbars.
* @param {!Object} xyRatio Contains a y property which is a float
* between 0 and 1 specifying the degree of scrolling and a
* similar x property.
* @private
*/
Blockly.VerticalFlyout.prototype.setMetrics_ = function(xyRatio) {
var metrics = this.getMetrics_();
// This is a fix to an apparent race condition.
if (!metrics) {
return;
}
if (goog.isNumber(xyRatio.y)) {
this.workspace_.scrollY = -metrics.contentHeight * xyRatio.y;
}
this.workspace_.translate(this.workspace_.scrollX + metrics.absoluteLeft,
this.workspace_.scrollY + metrics.absoluteTop);
this.clipRect_.setAttribute('height', Math.max(0, metrics.viewHeight) + 'px');
this.clipRect_.setAttribute('width', metrics.viewWidth + 'px');
if (this.categoryScrollPositions) {
this.selectCategoryByScrollPosition(-this.workspace_.scrollY);
}
};
/**
* Move the flyout to the edge of the workspace.
*/
Blockly.VerticalFlyout.prototype.position = function() {
if (!this.isVisible()) {
return;
}
var targetWorkspaceMetrics = this.targetWorkspace_.getMetrics();
if (!targetWorkspaceMetrics) {
// Hidden components will return null.
return;
}
// This version of the flyout does not change width to fit its contents.
// Instead it matches the width of its parent or uses a default value.
this.width_ = this.getWidth();
if (this.parentToolbox_) {
var toolboxWidth = this.parentToolbox_.getWidth();
var categoryWidth = toolboxWidth - this.width_;
var x = this.toolboxPosition_ == Blockly.TOOLBOX_AT_RIGHT ?
targetWorkspaceMetrics.viewWidth : categoryWidth;
var y = 0;
} else {
var x = this.toolboxPosition_ == Blockly.TOOLBOX_AT_RIGHT ?
targetWorkspaceMetrics.viewWidth - this.width_ : 0;
var y = 0;
}
// Record the height for Blockly.Flyout.getMetrics_
this.height_ = Math.max(0, targetWorkspaceMetrics.viewHeight - y);
this.setBackgroundPath_(this.width_, this.height_);
this.svgGroup_.setAttribute("width", this.width_);
this.svgGroup_.setAttribute("height", this.height_);
var transform = 'translate(' + x + 'px,' + y + 'px)';
Blockly.utils.setCssTransform(this.svgGroup_, transform);
// Update the scrollbar (if one exists).
if (this.scrollbar_) {
// Set the scrollbars origin to be the top left of the flyout.
this.scrollbar_.setOrigin(x, y);
this.scrollbar_.resize();
}
// The blocks need to be visible in order to be laid out and measured
// correctly, but we don't want the flyout to show up until it's properly
// sized. Opacity is set to zero in show().
this.svgGroup_.style.opacity = 1;
};
/**
* Create and set the path for the visible boundaries of the flyout.
* @param {number} width The width of the flyout, not including the
* rounded corners.
* @param {number} height The height of the flyout, not including
* rounded corners.
* @private
*/
Blockly.VerticalFlyout.prototype.setBackgroundPath_ = function(width, height) {
var atRight = this.toolboxPosition_ == Blockly.TOOLBOX_AT_RIGHT;
// Decide whether to start on the left or right.
var path = ['M ' + 0 + ',0'];
// Top.
path.push('h', width);
// Rounded corner.
path.push('a', this.CORNER_RADIUS, this.CORNER_RADIUS, 0, 0,
atRight ? 0 : 1,
atRight ? -this.CORNER_RADIUS : this.CORNER_RADIUS,
this.CORNER_RADIUS);
// Side closest to workspace.
path.push('v', Math.max(0, height - this.CORNER_RADIUS * 2));
// Rounded corner.
path.push('a', this.CORNER_RADIUS, this.CORNER_RADIUS, 0, 0,
atRight ? 0 : 1,
atRight ? this.CORNER_RADIUS : -this.CORNER_RADIUS,
this.CORNER_RADIUS);
// Bottom.
path.push('h', -width);
path.push('z');
this.svgBackground_.setAttribute('d', path.join(' '));
};
/**
* Scroll the flyout to the top.
*/
Blockly.VerticalFlyout.prototype.scrollToStart = function() {
this.scrollbar_.set(0);
};
/**
* Scroll the flyout to a position.
* @param {number} pos The targeted scroll position in workspace coordinates.
* @package
*/
Blockly.VerticalFlyout.prototype.scrollTo = function(pos) {
this.scrollTarget = pos * this.workspace_.scale;
// Make sure not to set the scroll target below the lowest point we can
// scroll to, i.e. the content height minus the view height
var metrics = this.workspace_.getMetrics();
var contentHeight = metrics.contentHeight;
var viewHeight = metrics.viewHeight;
this.scrollTarget = Math.min(this.scrollTarget, contentHeight - viewHeight);
this.stepScrollAnimation();
};
/**
* Scroll the flyout.
* @param {!Event} e Mouse wheel scroll event.
* @private
*/
Blockly.VerticalFlyout.prototype.wheel_ = function(e) {
// remove scrollTarget to stop auto scrolling in stepScrollAnimation
this.scrollTarget = null;
var delta = e.deltaY;
if (delta) {
// Firefox's mouse wheel deltas are a tenth that of Chrome/Safari.
// DeltaMode is 1 for a mouse wheel, but not for a trackpad scroll event
if (goog.userAgent.GECKO && (e.deltaMode === 1)) {
delta *= 10;
}
var metrics = this.getMetrics_();
var pos = (metrics.viewTop - metrics.contentTop) + delta;
var limit = metrics.contentHeight - metrics.viewHeight;
pos = Math.min(pos, limit);
pos = Math.max(pos, 0);
this.scrollbar_.set(pos);
// When the flyout moves from a wheel event, hide WidgetDiv and DropDownDiv.
Blockly.WidgetDiv.hide(true);
Blockly.DropDownDiv.hideWithoutAnimation();
}
// Don't scroll the page.
e.preventDefault();
// Don't propagate mousewheel event (zooming).
e.stopPropagation();
};
/**
* Delete blocks and background buttons from a previous showing of the flyout.
* @private
*/
Blockly.VerticalFlyout.prototype.clearOldBlocks_ = function() {
Blockly.VerticalFlyout.superClass_.clearOldBlocks_.call(this);
// Do the same for checkboxes.
for (var checkboxId in this.checkboxes_) {
if (!Object.prototype.hasOwnProperty.call(this.checkboxes_, checkboxId)) {
continue;
}
var checkbox = this.checkboxes_[checkboxId];
checkbox.block.flyoutCheckbox = null;
goog.dom.removeNode(checkbox.svgRoot);
}
this.checkboxes_ = {};
};
/**
* Add listeners to a block that has been added to the flyout.
* @param {Element} root The root node of the SVG group the block is in.
* @param {!Blockly.Block} block The block to add listeners for.
* @param {!Element} rect The invisible rectangle under the block that acts as
* a button for that block.
* @private
*/
Blockly.VerticalFlyout.prototype.addBlockListeners_ = function(root, block,
rect) {
Blockly.VerticalFlyout.superClass_.addBlockListeners_.call(this, root, block,
rect);
if (block.flyoutCheckbox) {
this.listeners_.push(Blockly.bindEvent_(block.flyoutCheckbox.svgRoot,
'mousedown', null, this.checkboxClicked_(block.flyoutCheckbox)));
}
};
/**
* Lay out the blocks in the flyout.
* @param {!Array.<!Object>} contents The blocks and buttons to lay out.
* @param {!Array.<number>} gaps The visible gaps between blocks.
* @private
*/
Blockly.VerticalFlyout.prototype.layout_ = function(contents, gaps) {
var margin = this.MARGIN;
var flyoutWidth = this.getWidth() / this.workspace_.scale;
var cursorX = margin;
var cursorY = margin;
for (var i = 0, item; item = contents[i]; i++) {
if (item.type == 'block') {
var block = item.block;
var allBlocks = block.getDescendants(false);
for (var j = 0, child; child = allBlocks[j]; j++) {
// Mark blocks as being inside a flyout. This is used to detect and
// prevent the closure of the flyout if the user right-clicks on such a
// block.
child.isInFlyout = true;
}
var root = block.getSvgRoot();
var blockHW = block.getHeightWidth();
// Figure out where the block goes, taking into account its size, whether
// we're in RTL mode, and whether it has a checkbox.
var oldX = block.getRelativeToSurfaceXY().x;
var newX = flyoutWidth - this.MARGIN;
var moveX = this.RTL ? newX - oldX : margin;
if (block.hasCheckboxInFlyout()) {
this.createCheckbox_(block, cursorX, cursorY, blockHW);
if (this.RTL) {
moveX -= (this.CHECKBOX_SIZE + this.CHECKBOX_MARGIN);
} else {
moveX += this.CHECKBOX_SIZE + this.CHECKBOX_MARGIN;
}
}
// The block moves a bit extra for the hat, but the block's rectangle
// doesn't. That's because the hat actually extends up from 0.
block.moveBy(moveX,
cursorY + (block.startHat_ ? Blockly.BlockSvg.START_HAT_HEIGHT : 0));
var rect = this.createRect_(block, this.RTL ? moveX - blockHW.width : moveX, cursorY, blockHW, i);
this.addBlockListeners_(root, block, rect);
cursorY += blockHW.height + gaps[i] + (block.startHat_ ? Blockly.BlockSvg.START_HAT_HEIGHT : 0);
} else if (item.type == 'button') {
var button = item.button;
var buttonSvg = button.createDom();
if (this.RTL) {
button.moveTo(flyoutWidth - this.MARGIN - button.width, cursorY);
} else {
button.moveTo(cursorX, cursorY);
}
button.show();
// Clicking on a flyout button or label is a lot like clicking on the
// flyout background.
this.listeners_.push(Blockly.bindEventWithChecks_(
buttonSvg, 'mousedown', this, this.onMouseDown_));
this.buttons_.push(button);
cursorY += button.height + gaps[i];
}
}
};
/**
* Create and place a rectangle corresponding to the given block.
* @param {!Blockly.Block} block The block to associate the rect to.
* @param {number} x The x position of the cursor during this layout pass.
* @param {number} y The y position of the cursor during this layout pass.
* @param {!{height: number, width: number}} blockHW The height and width of the
* block.
* @param {number} index The index into the background buttons list where this
* rect should be placed.
* @return {!SVGElement} Newly created SVG element for the rectangle behind the
* block.
* @private
*/
Blockly.VerticalFlyout.prototype.createRect_ = function(block, x, y,
blockHW, index) {
// Create an invisible rectangle under the block to act as a button. Just
// using the block as a button is poor, since blocks have holes in them.
var rect = Blockly.utils.createSvgElement('rect',
{
'fill-opacity': 0,
'x': x,
'y': y,
'height': blockHW.height,
'width': blockHW.width
}, null);
rect.tooltip = block;
Blockly.Tooltip.bindMouseEvents(rect);
// Add the rectangles under the blocks, so that the blocks' tooltips work.
this.workspace_.getCanvas().insertBefore(rect, block.getSvgRoot());
block.flyoutRect_ = rect;
this.backgroundButtons_[index] = rect;
return rect;
};
/**
* Create and place a checkbox corresponding to the given block.
* @param {!Blockly.Block} block The block to associate the checkbox to.
* @param {number} cursorX The x position of the cursor during this layout pass.
* @param {number} cursorY The y position of the cursor during this layout pass.
* @param {!{height: number, width: number}} blockHW The height and width of the
* block.
* @private
*/
Blockly.VerticalFlyout.prototype.createCheckbox_ = function(block, cursorX,
cursorY, blockHW) {
var checkboxState = Blockly.VerticalFlyout.getCheckboxState(block.id);
var svgRoot = block.getSvgRoot();
var extraSpace = this.CHECKBOX_SIZE + this.CHECKBOX_MARGIN;
var width = this.RTL ? this.getWidth() / this.workspace_.scale - extraSpace : cursorX;
var height = cursorY + blockHW.height / 2 - this.CHECKBOX_SIZE / 2;
var touchMargin = this.CHECKBOX_TOUCH_PADDING;
var checkboxGroup = Blockly.utils.createSvgElement('g',
{
'transform': 'translate(' + width + ', ' + height + ')'
}, null);
Blockly.utils.createSvgElement('rect',
{
'class': 'blocklyFlyoutCheckbox',
'height': this.CHECKBOX_SIZE,
'width': this.CHECKBOX_SIZE,
'rx': this.CHECKBOX_CORNER_RADIUS,
'ry': this.CHECKBOX_CORNER_RADIUS
}, checkboxGroup);
Blockly.utils.createSvgElement('path',
{
'class': 'blocklyFlyoutCheckboxPath',
'd': this.CHECKMARK_PATH
}, checkboxGroup);
Blockly.utils.createSvgElement('rect',
{
'class': 'blocklyTouchTargetBackground',
'x': -touchMargin + 'px',
'y': -touchMargin + 'px',
'height': this.CHECKBOX_SIZE + 2 * touchMargin,
'width': this.CHECKBOX_SIZE + 2 * touchMargin,
}, checkboxGroup);
var checkboxObj = {svgRoot: checkboxGroup, clicked: checkboxState, block: block};
if (checkboxState) {
Blockly.utils.addClass((checkboxObj.svgRoot), 'checked');
}
block.flyoutCheckbox = checkboxObj;
this.workspace_.getCanvas().insertBefore(checkboxGroup, svgRoot);
this.checkboxes_[block.id] = checkboxObj;
};
/**
* Respond to a click on a checkbox in the flyout.
* @param {!Object} checkboxObj An object containing the svg element of the
* checkbox, a boolean for the state of the checkbox, and the block the
* checkbox is associated with.
* @return {!Function} Function to call when checkbox is clicked.
* @private
*/
Blockly.VerticalFlyout.prototype.checkboxClicked_ = function(checkboxObj) {
return function(e) {
this.setCheckboxState(checkboxObj.block.id, !checkboxObj.clicked);
// This event has been handled. No need to bubble up to the document.
e.stopPropagation();
e.preventDefault();
}.bind(this);
};
/**
* Set the state of a checkbox by block ID.
* @param {string} blockId ID of the block whose checkbox should be set
* @param {boolean} value Value to set the checkbox to.
* @public
*/
Blockly.VerticalFlyout.prototype.setCheckboxState = function(blockId, value) {
var checkboxObj = this.checkboxes_[blockId];
if (!checkboxObj || checkboxObj.clicked === value) {
return;
}
var oldValue = checkboxObj.clicked;
checkboxObj.clicked = value;
if (checkboxObj.clicked) {
Blockly.utils.addClass(checkboxObj.svgRoot, 'checked');
} else {
Blockly.utils.removeClass(checkboxObj.svgRoot, 'checked');
}
Blockly.Events.fire(new Blockly.Events.Change(
checkboxObj.block, 'checkbox', null, oldValue, value));
};
/**
* Determine if a drag delta is toward the workspace, based on the position
* and orientation of the flyout. This to decide if a new block should be
* created or if the flyout should scroll.
* @param {!goog.math.Coordinate} currentDragDeltaXY How far the pointer has
* moved from the position at mouse down, in pixel units.
* @return {boolean} true if the drag is toward the workspace.
* @package
*/
Blockly.VerticalFlyout.prototype.isDragTowardWorkspace = function(currentDragDeltaXY) {
var dx = currentDragDeltaXY.x;
var dy = currentDragDeltaXY.y;
// Direction goes from -180 to 180, with 0 toward the right and 90 on top.
var dragDirection = Math.atan2(dy, dx) / Math.PI * 180;
var draggingTowardWorkspace = false;
var range = this.dragAngleRange_;
if (this.toolboxPosition_ == Blockly.TOOLBOX_AT_LEFT) {
// Vertical at left.
if (dragDirection < range && dragDirection > -range) {
draggingTowardWorkspace = true;
}
} else {
// Vertical at right.
if (dragDirection < -180 + range || dragDirection > 180 - range) {
draggingTowardWorkspace = true;
}
}
return draggingTowardWorkspace;
};
/**
* Return the deletion rectangle for this flyout in viewport coordinates.
* Deletion area is the height of the flyout, but extends to the left (in LTR)
* by a lot in order to allow for deleting blocks when dragged beyond the left
* window edge. In RTL, the delete area extends off to the right.
* The top/bottom do not extend to allow dragging blocks outside of the workspace
* to be dropped (e.g. to the backpack).
* @return {goog.math.Rect} Rectangle in which to delete.
*/
Blockly.VerticalFlyout.prototype.getClientRect = function() {
if (!this.svgGroup_) {
return null;
}
var flyoutRect = this.svgGroup_.getBoundingClientRect();
// BIG_NUM is offscreen padding so that blocks dragged beyond the shown flyout
// area are still deleted. Must be larger than the largest screen size,
// but be smaller than half Number.MAX_SAFE_INTEGER (not available on IE).
var BIG_NUM = 1000000000;
var x = flyoutRect.left;
var y = flyoutRect.top;
var width = flyoutRect.width;
var height = flyoutRect.height;
if (this.toolboxPosition_ == Blockly.TOOLBOX_AT_LEFT) {
return new goog.math.Rect(x - BIG_NUM, y, BIG_NUM + width, height);
} else { // Right
return new goog.math.Rect(x, y, BIG_NUM + width, height);
}
};
/**
* Compute width of flyout. Position button under each block.
* For RTL: Lay out the blocks right-aligned.
* @param {!Array<!Blockly.Block>} blocks The blocks to reflow.
*/
Blockly.VerticalFlyout.prototype.reflowInternal_ = function(/* blocks */) {
// This is a no-op because the flyout is a fixed size.
return;
};
/**
* Gets the checkbox state for a block
* @param {string} blockId The ID of the block in question.
* @return {boolean} Whether the block is checked.
* @public
*/
Blockly.VerticalFlyout.getCheckboxState = function(/* blockId */) {
return false;
};