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Correctly ghost the last block in the stack
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@rachel-fenichel
rachel-fenichel committed Apr 6, 2016
1 parent 3a07be9 commit b20a278
Showing 1 changed file with 45 additions and 24 deletions.
69 changes: 45 additions & 24 deletions core/block_svg.js
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Original file line number Diff line number Diff line change
Expand Up @@ -384,7 +384,8 @@ Blockly.BlockSvg.prototype.snapToGrid = function() {
/**
* Returns a bounding box describing the dimensions of this block
* and any blocks stacked below it.
* @return {!{height: number, width: number}} Object with height and width properties.
* @return {!{height: number, width: number}} Object with height and width
* properties.
*/
Blockly.BlockSvg.prototype.getHeightWidth = function() {
var height = this.height;
Expand All @@ -403,10 +404,10 @@ Blockly.BlockSvg.prototype.getHeightWidth = function() {
};

/**
* Returns the coordinates of a bounding box describing the dimensions of this block
* and any blocks stacked below it.
* Returns the coordinates of a bounding box describing the dimensions of this
* block and any blocks stacked below it.
* @return {!{topLeft: goog.math.Coordinate, bottomRight: goog.math.Coordinate}}
* Object with top left and bottom right coordinates of the bounding box.
* Object with top left and bottom right coordinates of the bounding box.
*/
Blockly.BlockSvg.prototype.getBoundingRectangle = function() {
var blockXY = this.getRelativeToSurfaceXY(this);
Expand All @@ -416,10 +417,12 @@ Blockly.BlockSvg.prototype.getBoundingRectangle = function() {
var bottomRight;
if (this.RTL) {
// Width has the tab built into it already so subtract it here.
topLeft = new goog.math.Coordinate(blockXY.x - (blockBounds.width - tab), blockXY.y);
topLeft = new goog.math.Coordinate(blockXY.x - (blockBounds.width - tab),
blockXY.y);
// Add the width of the tab/puzzle piece knob to the x coordinate
// since X is the corner of the rectangle, not the whole puzzle piece.
bottomRight = new goog.math.Coordinate(blockXY.x + tab, blockXY.y + blockBounds.height);
bottomRight = new goog.math.Coordinate(blockXY.x + tab,
blockXY.y + blockBounds.height);
} else {
// Subtract the width of the tab/puzzle piece knob to the x coordinate
// since X is the corner of the rectangle, not the whole puzzle piece.
Expand Down Expand Up @@ -592,12 +595,7 @@ Blockly.BlockSvg.prototype.onMouseUp_ = function(e) {
Blockly.setPageSelectable(true);
Blockly.terminateDrag_();
if (Blockly.selected && Blockly.highlightedConnection_) {
if (Blockly.localConnection_ == Blockly.selected.nextConnection) {
// Snap to match the position of the pre-existing stack.
Blockly.selected.moveBy(
Blockly.highlightedConnection_.x_ - Blockly.localConnection_.x_,
Blockly.highlightedConnection_.y_ - Blockly.localConnection_.y_);
} else if (Blockly.localConnection_ ==
if (Blockly.localConnection_ ==
Blockly.selected.getFirstStatementConnection()) {
// Snap to match the position of the pre-existing stack. Since this is a
// C-block, shift to take into account how the block will stretch as it
Expand All @@ -607,6 +605,11 @@ Blockly.BlockSvg.prototype.onMouseUp_ = function(e) {
Blockly.highlightedConnection_.y_ - Blockly.localConnection_.y_ -
(Blockly.highlightedConnection_.sourceBlock_.getHeightWidth().height -
Blockly.BlockSvg.MIN_BLOCK_Y));
} else if (Blockly.localConnection_.type == Blockly.NEXT_STATEMENT) {
// Snap to match the position of the pre-existing stack.
Blockly.selected.moveBy(
Blockly.highlightedConnection_.x_ - Blockly.localConnection_.x_,
Blockly.highlightedConnection_.y_ - Blockly.localConnection_.y_);
}
// Connect two blocks together.
Blockly.localConnection_.connect(Blockly.highlightedConnection_);
Expand Down Expand Up @@ -853,8 +856,10 @@ Blockly.BlockSvg.prototype.onMouseMove_ = function(e) {
}
}

var candidateIsLast = (localConnection == lastOnStack);
this.updatePreviews(closestConnection, localConnection, radiusConnection,
e, newXY.x - this.dragStartXY_.x, newXY.y - this.dragStartXY_.y);
e, newXY.x - this.dragStartXY_.x, newXY.y - this.dragStartXY_.y,
candidateIsLast);
}
// This event has been handled. No need to bubble up to the document.
e.stopPropagation();
Expand All @@ -873,9 +878,11 @@ Blockly.BlockSvg.prototype.onMouseMove_ = function(e) {
* point in the drag.
* @param {number} dy The y distance the block has moved onscreen up to this
* point in the drag.
* @param {boolean} candidateIsLast True if the dragging stack is more than one
* block long and localConnection is the last connection on the stack.
*/
Blockly.BlockSvg.prototype.updatePreviews = function(closestConnection,
localConnection, radiusConnection, e, dx, dy) {
localConnection, radiusConnection, e, dx, dy, candidateIsLast) {
// Don't fire events for insertion marker creation or movement.
Blockly.Events.disable();
// Remove an insertion marker if needed. For Scratch-Blockly we are using
Expand All @@ -886,6 +893,14 @@ Blockly.BlockSvg.prototype.updatePreviews = function(closestConnection,
if (Blockly.insertionMarker_ && Blockly.insertionMarkerConnection_) {
Blockly.BlockSvg.disconnectInsertionMarker();
}
// If there's already an insertion marker but it's representing the wrong
// block, delete it so we can create the correct one.
if (Blockly.insertionMarker_ &&
(candidateIsLast && Blockly.localConnection_.sourceBlock_ == this) ||
(!candidateIsLast && Blockly.localConnection_.sourceBlock_ != this)) {
Blockly.insertionMarker_.dispose();
Blockly.insertionMarker_ = null;
}
Blockly.highlightedConnection_ = null;
Blockly.localConnection_ = null;
}
Expand All @@ -894,23 +909,25 @@ Blockly.BlockSvg.prototype.updatePreviews = function(closestConnection,
if (closestConnection &&
closestConnection != Blockly.highlightedConnection_ &&
!closestConnection.sourceBlock_.isInsertionMarker()) {

Blockly.highlightedConnection_ = closestConnection;
Blockly.localConnection_ = localConnection;
if (!Blockly.insertionMarker_){
Blockly.insertionMarker_ = this.workspace.newBlock(this.type);
if (!Blockly.insertionMarker_) {
Blockly.insertionMarker_ =
this.workspace.newBlock(Blockly.localConnection_.sourceBlock_.type);
Blockly.insertionMarker_.setInsertionMarker(true);
Blockly.insertionMarker_.initSvg();
}

var insertionMarker = Blockly.insertionMarker_;
var insertionMarkerConnection = insertionMarker.getMatchingConnection(this,
localConnection);
var insertionMarkerConnection = insertionMarker.getMatchingConnection(
localConnection.sourceBlock_, localConnection);
if (insertionMarkerConnection != Blockly.insertionMarkerConnection_) {
insertionMarker.getSvgRoot().setAttribute('visibility', 'visible');
insertionMarker.rendered = true;
// Move the preview to the correct location before the existing block.
if (insertionMarkerConnection.type == Blockly.NEXT_STATEMENT) {
var relativeXy = this.getRelativeToSurfaceXY();
var relativeXy = localConnection.sourceBlock_.getRelativeToSurfaceXY();
var connectionOffsetX = (localConnection.x_ - (relativeXy.x - dx));
var connectionOffsetY = (localConnection.y_ - (relativeXy.y - dy));
var newX = closestConnection.x_ - connectionOffsetX;
Expand Down Expand Up @@ -1317,11 +1334,15 @@ Blockly.BlockSvg.prototype.removeDragging = function() {
/**
* Change the colour of a block.
* @param {number|string} colour HSV hue value, or #RRGGBB string.
* @param {number|string} colourSecondary Secondary HSV hue value, or #RRGGBB string.
* @param {number|string} colourTertiary Tertiary HSV hue value, or #RRGGBB string.
*/
Blockly.BlockSvg.prototype.setColour = function(colour, colourSecondary, colourTertiary) {
Blockly.BlockSvg.superClass_.setColour.call(this, colour, colourSecondary, colourTertiary);
* @param {number|string} colourSecondary Secondary HSV hue value, or #RRGGBB
* string.
* @param {number|string} colourTertiary Tertiary HSV hue value, or #RRGGBB
* string.
*/
Blockly.BlockSvg.prototype.setColour = function(colour, colourSecondary,
colourTertiary) {
Blockly.BlockSvg.superClass_.setColour.call(this, colour, colourSecondary,
colourTertiary);

if (this.rendered) {
this.updateColour();
Expand Down

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