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feat: Support unified customizable keyboard and mouse event handling.
Keyboard and mouse bindings are now both specified using the new EventActionMap class, that maps an event identifier to an action specification. Mouse bindings are no longer hardcoded in RenderedDataPanel, PerspectivePanel, and SliceViewPanel. Actions are now dispatched using the DOM event mechanism rather than the previous ad-hoc mechanism.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| /** | ||
| * @license | ||
| * Copyright 2016 Google Inc. | ||
| * 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. | ||
| */ | ||
|
|
||
| import {Overlay} from 'neuroglancer/overlay'; | ||
| import {EventActionMap} from 'neuroglancer/util/event_action_map'; | ||
|
|
||
| require('./input_event_bindings.css'); | ||
|
|
||
| export function formatKeyName(name: string) { | ||
| if (name.startsWith('key')) { | ||
| return name.substring(3); | ||
| } | ||
| if (name.startsWith('digit')) { | ||
| return name.substring(5); | ||
| } | ||
| if (name.startsWith('arrow')) { | ||
| return name.substring(5); | ||
| } | ||
| return name; | ||
| } | ||
|
|
||
| export function formatKeyStroke(stroke: string) { | ||
| let parts = stroke.split('+'); | ||
| return parts.map(formatKeyName).join('+'); | ||
| } | ||
|
|
||
| export class InputEventBindingHelpDialog extends Overlay { | ||
| /** | ||
| * @param keyMap Key map to list. | ||
| */ | ||
| constructor(bindings: Iterable<[string, EventActionMap]>) { | ||
| super(); | ||
|
|
||
| let {content} = this; | ||
| content.classList.add('describe-key-bindings'); | ||
|
|
||
| let scroll = document.createElement('div'); | ||
| scroll.classList.add('describe-key-bindings-container'); | ||
|
|
||
| interface BindingList { | ||
| label: string; | ||
| entries: Map<string, string>; | ||
| } | ||
|
|
||
| const uniqueMaps = new Map<EventActionMap, BindingList>(); | ||
| function addEntries(eventMap: EventActionMap, entries: Map<string, string>) { | ||
| for (const parent of eventMap.parents) { | ||
| if (parent.label !== undefined) { | ||
| addMap(parent.label, parent); | ||
| } else { | ||
| addEntries(parent, entries); | ||
| } | ||
| } | ||
| for (const [event, eventAction] of eventMap.bindings.entries()) { | ||
| const firstColon = event.indexOf(':'); | ||
| const suffix = event.substring(firstColon + 1); | ||
| entries.set(suffix, eventAction.action); | ||
| } | ||
| } | ||
|
|
||
| function addMap(label: string, map: EventActionMap) { | ||
| if (uniqueMaps.has(map)) { | ||
| return; | ||
| } | ||
| const list: BindingList = { | ||
| label, | ||
| entries: new Map(), | ||
| }; | ||
| addEntries(map, list.entries); | ||
| uniqueMaps.set(map, list); | ||
| } | ||
|
|
||
| for (const [label, eventMap] of bindings) { | ||
| addMap(label, eventMap); | ||
| } | ||
|
|
||
| for (const list of uniqueMaps.values()) { | ||
| let header = document.createElement('h2'); | ||
| header.textContent = list.label; | ||
| scroll.appendChild(header); | ||
| let dl = document.createElement('div'); | ||
| dl.className = 'dl'; | ||
|
|
||
| for (const [event, action] of list.entries) { | ||
| let container = document.createElement('div'); | ||
| let container2 = document.createElement('div'); | ||
| container2.className = 'definition-outer-container'; | ||
| container.className = 'definition-container'; | ||
| let dt = document.createElement('div'); | ||
| dt.className = 'dt'; | ||
| dt.textContent = formatKeyStroke(event); | ||
| let dd = document.createElement('div'); | ||
| dd.className = 'dd'; | ||
| dd.textContent = action; | ||
| container.appendChild(dt); | ||
| container.appendChild(dd); | ||
| dl.appendChild(container2); | ||
| container2.appendChild(container); | ||
| } | ||
| scroll.appendChild(dl); | ||
| } | ||
| content.appendChild(scroll); | ||
| } | ||
| } | ||
|
|
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