* Implement basic field_number type
* Add whole number and positive number
* Remove bad arguments for showEditor_
* Basic implementation and styling of num-pad
* Remove virtual keyboards; add selection and read-only
* Add editing for the number pad
* Add backspace button to number pad
* Fix text padding for font-weight and extra magic
* Don't show decimal point for integers
* Re-update default WeDo numbers
* Refactor and improve documentation of field_number
* Update all assets from Carl
* Update when-broadcast-received and dropdown sizes
* Update icon menu sizing
* Update padding on drop-down div
* Update WeDo and event blocks; defaults
* Update multi_playground and vertical_playground
* Recompile with CSS updates
* Updating default icon reference for wedo_motorspeed
* Icon menu and drop-down stubs
* Recompile 4/15
* Fix stubs to draw shadow block for drop-down
* Fix rendering of shadow for icon menu
* Add arrow to dropdown button
* Add drop-down buttons to rest of examples
* Implementation of drop-down div including positioning
* Drop-downs take colours from the blocks
* Fix scaled secondary position of drop-downs
* Fix arrow positioning for RTL
* Use SVG parentNode for sizing dropdown
* Use transform for drop-down positioning
* Add basic DropDownDiv hide
* Add animation-in to dropdown
* More subtle drop-down animation and shadow
* Add icon menu example
* Use options style of Blockly FieldImage for drop-down
* Add default value for iconmenu
* Add example hover, active states for iconmenu buttons
* Update dropdown_icon example
* Implement icon-menu value handling and default value
* Add updating the parent block image field to dropdown
* Drop-down animates out; add hooks to hide for various Blockly happenings
* Add pointer cursor for drop-down icons
* Improve documentation for drop-downs and minor refactor
* Factor out getSrcForValue in iconmenu
* Blocks take on the icon of their icon-menu
* Add basic accessibility properties, similar to closure
* Remove extra drop-down example; update playgrounds
* Remove unnecessary colour overrides
* Add onHide, colour changing, fix references in dropdowndiv
* Flip arrow when the drop-down is rendered above
* Hide the icon menu drop-down on second tap of button
* Add preventDefault to button ontouchstart
* Updates to drop-down from Carl
* Add icon-menu placeholders and a crazy demo
* Fix naming to normalize (drop-down, DropDown)
* Add license header
* Animate the font-size of text fields
* Allow WidgetDiv to hide immediately, no animation
And add calls to this where the div animation may become out of sync with the field itself.
* Fix CSS colour substitution to replace all
* Add box-shadow to text field
* Fix padding on blocklyHtmlInput
* Add utility for measuring text using canvas
* Grow the input textbox based on the text size
* Fix the text field width to a maximum depending on render mode
* Fix text input field height for scaling
* Position text input field based width
* Animate out width, height, margin of text input
* Fix scale of marginLeft and extra 1px
* Fix height, padding, font-weight on text input field
* Make input field text smaller on truncation per spec
* Re-apply change to Blockly.WidgetDiv.disposeAnimationTimer_
* Add comment to Blockly.Field.maxDisplayLength
* Add and render opacity of blocks
* Add insertion marker colour and opacity
* Add goog.require for Colours in block.js
* Add color of text field during editing
* Add colour overriding upon injection
* Add colours to CSS at run-time injection
* Expand colour variables to include toolbox, flyout, scrollbars
* Example of dark mode in horizontal_playground
* Fix loop style for colours
css to mark text as unselectable instead. I can't prove this is
significantly faster with numbers since the call to setup the time out
costs ~.1ms and the call when the timer fires is ~.05. This happens on almost
every mouse event though. Plus, it seems to remove a flicker of highlighting when
frames are skipped and keeps scrolling via the scrollbar from highlighting.
-Convert most constants in the code to use multiplications of GRID_UNIT (4px). This lets us be consistent with Carl's specs and helps explain the numbers a little better.
-Implement notches using cubic curves instead of arcs. This version matches the spec pretty much exactly. As part of this, remove NOTCH_BASE_HEIGHT which is no longer relevant.
-Slight simplification of renderCompute_ (which calculates metrics).
-Fixed SEP_SPACE_X and SEP_SPACE_Y to be the correct number of grid units. Our blocks before were slightly too small, now they are the right size.
-Implement the correct corner radius, hat/end hat radius.
-Add fixed ICON_WIDTH and ICON_HEIGHT, i.e., always size the icons to 40x40px as according to the spec.
-Add fixed STATEMENT_BLOCK_SPACE to represent the size of the bar above forever/repeat/pants blocks. Previously the code was assuming this was SEP_SPACE_Y, when in fact the spec has it as larger (4 units).
-Add accurate MIN_BLOCK_X and MIN_BLOCK_Y for simpler calculation of minimum bay size.
-Remove some unused SVG paths (INNER_TOP_LEFT_CORNER, INNER_BOTTOM_LEFT_CORNER).
-Remove extra code in getHeightWidth which caused a bug in rendering forever-in-repeat.
-Fix stroke width around the blocks to be 1px, according to spec.
I've checked that everything lines up with Carl's spec images at 8x zoom.
This should implement #69, #70, #71, #72, #74, and #75 (not 73 as we haven't done that input yet).
