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source: Dev/trunk/src/client/dijit/layout/ScrollingTabController.js @ 483

Last change on this file since 483 was 483, checked in by hendrikvanantwerpen, 11 years ago
Added Dojo 1.9.3 release.
File size: 16.7 KB

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1	define([
2	"dojo/_base/array", // array.forEach
3	"dojo/_base/declare", // declare
4	"dojo/dom-class", // domClass.add domClass.contains
5	"dojo/dom-geometry", // domGeometry.contentBox
6	"dojo/dom-style", // domStyle.style
7	"dojo/_base/fx", // Animation
8	"dojo/_base/lang", // lang.hitch
9	"dojo/on",
10	"dojo/query", // query
11	"dojo/sniff", // has("ie"), has("webkit"), has("quirks")
12	"../registry", // registry.byId()
13	"dojo/text!./templates/ScrollingTabController.html",
14	"dojo/text!./templates/_ScrollingTabControllerButton.html",
15	"./TabController",
16	"./utils", // marginBox2contextBox, layoutChildren
17	"../_WidgetsInTemplateMixin",
18	"../Menu",
19	"../MenuItem",
20	"../form/Button",
21	"../_HasDropDown",
22	"dojo/NodeList-dom", // NodeList.style
23	"../a11yclick" // template uses ondijitclick (not for keyboard support, but for responsive touch support)
24	], function(array, declare, domClass, domGeometry, domStyle, fx, lang, on, query, has,
25	registry, tabControllerTemplate, buttonTemplate, TabController, layoutUtils, _WidgetsInTemplateMixin,
26	Menu, MenuItem, Button, _HasDropDown){
27
28	// module:
29	// dijit/layout/ScrollingTabController
30
31	var ScrollingTabController = declare("dijit.layout.ScrollingTabController", [TabController, _WidgetsInTemplateMixin], {
32	// summary:
33	// Set of tabs with left/right arrow keys and a menu to switch between tabs not
34	// all fitting on a single row.
35	// Works only for horizontal tabs (either above or below the content, not to the left
36	// or right).
37	// tags:
38	// private
39
40	baseClass: "dijitTabController dijitScrollingTabController",
41
42	templateString: tabControllerTemplate,
43
44	// useMenu: [const] Boolean
45	// True if a menu should be used to select tabs when they are too
46	// wide to fit the TabContainer, false otherwise.
47	useMenu: true,
48
49	// useSlider: [const] Boolean
50	// True if a slider should be used to select tabs when they are too
51	// wide to fit the TabContainer, false otherwise.
52	useSlider: true,
53
54	// tabStripClass: [const] String
55	// The css class to apply to the tab strip, if it is visible.
56	tabStripClass: "",
57
58	// _minScroll: Number
59	// The distance in pixels from the edge of the tab strip which,
60	// if a scroll animation is less than, forces the scroll to
61	// go all the way to the left/right.
62	_minScroll: 5,
63
64	// Override default behavior mapping class to DOMNode
65	_setClassAttr: { node: "containerNode", type: "class" },
66
67	buildRendering: function(){
68	this.inherited(arguments);
69	var n = this.domNode;
70
71	this.scrollNode = this.tablistWrapper;
72	this._initButtons();
73
74	if(!this.tabStripClass){
75	this.tabStripClass = "dijitTabContainer" +
76	this.tabPosition.charAt(0).toUpperCase() +
77	this.tabPosition.substr(1).replace(/-.*/, "") +
78	"None";
79	domClass.add(n, "tabStrip-disabled")
80	}
81
82	domClass.add(this.tablistWrapper, this.tabStripClass);
83	},
84
85	onStartup: function(){
86	this.inherited(arguments);
87
88	// TabController is hidden until it finishes drawing, to give
89	// a less visually jumpy instantiation. When it's finished, set visibility to ""
90	// to that the tabs are hidden/shown depending on the container's visibility setting.
91	domStyle.set(this.domNode, "visibility", "");
92	this._postStartup = true;
93
94	// changes to the tab button label or iconClass will have changed the width of the
95	// buttons, so do a resize
96	this.own(on(this.containerNode, "attrmodified-label, attrmodified-iconclass", lang.hitch(this, function(evt){
97	if(this._dim){
98	this.resize(this._dim);
99	}
100	})));
101	},
102
103	onAddChild: function(page, insertIndex){
104	this.inherited(arguments);
105
106	// Increment the width of the wrapper when a tab is added
107	// This makes sure that the buttons never wrap.
108	// The value 200 is chosen as it should be bigger than most
109	// Tab button widths.
110	domStyle.set(this.containerNode, "width",
111	(domStyle.get(this.containerNode, "width") + 200) + "px");
112	},
113
114	onRemoveChild: function(page, insertIndex){
115	// null out _selectedTab because we are about to delete that dom node
116	var button = this.pane2button(page.id);
117	if(this._selectedTab === button.domNode){
118	this._selectedTab = null;
119	}
120
121	this.inherited(arguments);
122	},
123
124	_initButtons: function(){
125	// summary:
126	// Creates the buttons used to scroll to view tabs that
127	// may not be visible if the TabContainer is too narrow.
128
129	// Make a list of the buttons to display when the tab labels become
130	// wider than the TabContainer, and hide the other buttons.
131	// Also gets the total width of the displayed buttons.
132	this._btnWidth = 0;
133	this._buttons = query("> .tabStripButton", this.domNode).filter(function(btn){
134	if((this.useMenu && btn == this._menuBtn.domNode) \|\|
135	(this.useSlider && (btn == this._rightBtn.domNode \|\| btn == this._leftBtn.domNode))){
136	this._btnWidth += domGeometry.getMarginSize(btn).w;
137	return true;
138	}else{
139	domStyle.set(btn, "display", "none");
140	return false;
141	}
142	}, this);
143	},
144
145	_getTabsWidth: function(){
146	var children = this.getChildren();
147	if(children.length){
148	var leftTab = children[this.isLeftToRight() ? 0 : children.length - 1].domNode,
149	rightTab = children[this.isLeftToRight() ? children.length - 1 : 0].domNode;
150	return rightTab.offsetLeft + rightTab.offsetWidth - leftTab.offsetLeft;
151	}else{
152	return 0;
153	}
154	},
155
156	_enableBtn: function(width){
157	// summary:
158	// Determines if the tabs are wider than the width of the TabContainer, and
159	// thus that we need to display left/right/menu navigation buttons.
160	var tabsWidth = this._getTabsWidth();
161	width = width \|\| domStyle.get(this.scrollNode, "width");
162	return tabsWidth > 0 && width < tabsWidth;
163	},
164
165	resize: function(dim){
166	// summary:
167	// Hides or displays the buttons used to scroll the tab list and launch the menu
168	// that selects tabs.
169
170	// Save the dimensions to be used when a child is renamed.
171	this._dim = dim;
172
173	// Set my height to be my natural height (tall enough for one row of tab labels),
174	// and my content-box width based on margin-box width specified in dim parameter.
175	// But first reset scrollNode.height in case it was set by layoutChildren() call
176	// in a previous run of this method.
177	this.scrollNode.style.height = "auto";
178	var cb = this._contentBox = layoutUtils.marginBox2contentBox(this.domNode, {h: 0, w: dim.w});
179	cb.h = this.scrollNode.offsetHeight;
180	domGeometry.setContentSize(this.domNode, cb);
181
182	// Show/hide the left/right/menu navigation buttons depending on whether or not they
183	// are needed.
184	var enable = this._enableBtn(this._contentBox.w);
185	this._buttons.style("display", enable ? "" : "none");
186
187	// Position and size the navigation buttons and the tablist
188	this._leftBtn.region = "left";
189	this._rightBtn.region = "right";
190	this._menuBtn.region = this.isLeftToRight() ? "right" : "left";
191	layoutUtils.layoutChildren(this.domNode, this._contentBox,
192	[this._menuBtn, this._leftBtn, this._rightBtn, {domNode: this.scrollNode, region: "center"}]);
193
194	// set proper scroll so that selected tab is visible
195	if(this._selectedTab){
196	if(this._anim && this._anim.status() == "playing"){
197	this._anim.stop();
198	}
199	this.scrollNode.scrollLeft = this._convertToScrollLeft(this._getScrollForSelectedTab());
200	}
201
202	// Enable/disabled left right buttons depending on whether or not user can scroll to left or right
203	this._setButtonClass(this._getScroll());
204
205	this._postResize = true;
206
207	// Return my size so layoutChildren() can use it.
208	// Also avoids IE9 layout glitch on browser resize when scroll buttons present
209	return {h: this._contentBox.h, w: dim.w};
210	},
211
212	_getScroll: function(){
213	// summary:
214	// Returns the current scroll of the tabs where 0 means
215	// "scrolled all the way to the left" and some positive number, based on #
216	// of pixels of possible scroll (ex: 1000) means "scrolled all the way to the right"
217	return (this.isLeftToRight() \|\| has("ie") < 8 \|\| (has("ie") && has("quirks")) \|\| has("webkit")) ? this.scrollNode.scrollLeft :
218	domStyle.get(this.containerNode, "width") - domStyle.get(this.scrollNode, "width")
219	+ (has("ie") >= 8 ? -1 : 1) * this.scrollNode.scrollLeft;
220	},
221
222	_convertToScrollLeft: function(val){
223	// summary:
224	// Given a scroll value where 0 means "scrolled all the way to the left"
225	// and some positive number, based on # of pixels of possible scroll (ex: 1000)
226	// means "scrolled all the way to the right", return value to set this.scrollNode.scrollLeft
227	// to achieve that scroll.
228	//
229	// This method is to adjust for RTL funniness in various browsers and versions.
230	if(this.isLeftToRight() \|\| has("ie") < 8 \|\| (has("ie") && has("quirks")) \|\| has("webkit")){
231	return val;
232	}else{
233	var maxScroll = domStyle.get(this.containerNode, "width") - domStyle.get(this.scrollNode, "width");
234	return (has("ie") >= 8 ? -1 : 1) * (val - maxScroll);
235	}
236	},
237
238	onSelectChild: function(/dijit/_WidgetBase/ page){
239	// summary:
240	// Smoothly scrolls to a tab when it is selected.
241
242	var tab = this.pane2button(page.id);
243	if(!tab){
244	return;
245	}
246
247	var node = tab.domNode;
248
249	// Save the selection
250	if(node != this._selectedTab){
251	this._selectedTab = node;
252
253	// Scroll to the selected tab, except on startup, when scrolling is handled in resize()
254	if(this._postResize){
255	var sl = this._getScroll();
256
257	if(sl > node.offsetLeft \|\|
258	sl + domStyle.get(this.scrollNode, "width") <
259	node.offsetLeft + domStyle.get(node, "width")){
260	this.createSmoothScroll().play();
261	}
262	}
263	}
264
265	this.inherited(arguments);
266	},
267
268	_getScrollBounds: function(){
269	// summary:
270	// Returns the minimum and maximum scroll setting to show the leftmost and rightmost
271	// tabs (respectively)
272	var children = this.getChildren(),
273	scrollNodeWidth = domStyle.get(this.scrollNode, "width"), // about 500px
274	containerWidth = domStyle.get(this.containerNode, "width"), // 50,000px
275	maxPossibleScroll = containerWidth - scrollNodeWidth, // scrolling until right edge of containerNode visible
276	tabsWidth = this._getTabsWidth();
277
278	if(children.length && tabsWidth > scrollNodeWidth){
279	// Scrolling should happen
280	return {
281	min: this.isLeftToRight() ? 0 : children[children.length - 1].domNode.offsetLeft,
282	max: this.isLeftToRight() ?
283	(children[children.length - 1].domNode.offsetLeft + children[children.length - 1].domNode.offsetWidth) - scrollNodeWidth :
284	maxPossibleScroll
285	};
286	}else{
287	// No scrolling needed, all tabs visible, we stay either scrolled to far left or far right (depending on dir)
288	var onlyScrollPosition = this.isLeftToRight() ? 0 : maxPossibleScroll;
289	return {
290	min: onlyScrollPosition,
291	max: onlyScrollPosition
292	};
293	}
294	},
295
296	_getScrollForSelectedTab: function(){
297	// summary:
298	// Returns the scroll value setting so that the selected tab
299	// will appear in the center
300	var w = this.scrollNode,
301	n = this._selectedTab,
302	scrollNodeWidth = domStyle.get(this.scrollNode, "width"),
303	scrollBounds = this._getScrollBounds();
304
305	// TODO: scroll minimal amount (to either right or left) so that
306	// selected tab is fully visible, and just return if it's already visible?
307	var pos = (n.offsetLeft + domStyle.get(n, "width") / 2) - scrollNodeWidth / 2;
308	pos = Math.min(Math.max(pos, scrollBounds.min), scrollBounds.max);
309
310	// TODO:
311	// If scrolling close to the left side or right side, scroll
312	// all the way to the left or right. See this._minScroll.
313	// (But need to make sure that doesn't scroll the tab out of view...)
314	return pos;
315	},
316
317	createSmoothScroll: function(x){
318	// summary:
319	// Creates a dojo._Animation object that smoothly scrolls the tab list
320	// either to a fixed horizontal pixel value, or to the selected tab.
321	// description:
322	// If an number argument is passed to the function, that horizontal
323	// pixel position is scrolled to. Otherwise the currently selected
324	// tab is scrolled to.
325	// x: Integer?
326	// An optional pixel value to scroll to, indicating distance from left.
327
328	// Calculate position to scroll to
329	if(arguments.length > 0){
330	// position specified by caller, just make sure it's within bounds
331	var scrollBounds = this._getScrollBounds();
332	x = Math.min(Math.max(x, scrollBounds.min), scrollBounds.max);
333	}else{
334	// scroll to center the current tab
335	x = this._getScrollForSelectedTab();
336	}
337
338	if(this._anim && this._anim.status() == "playing"){
339	this._anim.stop();
340	}
341
342	var self = this,
343	w = this.scrollNode,
344	anim = new fx.Animation({
345	beforeBegin: function(){
346	if(this.curve){
347	delete this.curve;
348	}
349	var oldS = w.scrollLeft,
350	newS = self._convertToScrollLeft(x);
351	anim.curve = new fx._Line(oldS, newS);
352	},
353	onAnimate: function(val){
354	w.scrollLeft = val;
355	}
356	});
357	this._anim = anim;
358
359	// Disable/enable left/right buttons according to new scroll position
360	this._setButtonClass(x);
361
362	return anim; // dojo/_base/fx/Animation
363	},
364
365	_getBtnNode: function(/Event/ e){
366	// summary:
367	// Gets a button DOM node from a mouse click event.
368	// e:
369	// The mouse click event.
370	var n = e.target;
371	while(n && !domClass.contains(n, "tabStripButton")){
372	n = n.parentNode;
373	}
374	return n;
375	},
376
377	doSlideRight: function(/Event/ e){
378	// summary:
379	// Scrolls the menu to the right.
380	// e:
381	// The mouse click event.
382	this.doSlide(1, this._getBtnNode(e));
383	},
384
385	doSlideLeft: function(/Event/ e){
386	// summary:
387	// Scrolls the menu to the left.
388	// e:
389	// The mouse click event.
390	this.doSlide(-1, this._getBtnNode(e));
391	},
392
393	doSlide: function(/Number/ direction, /DomNode/ node){
394	// summary:
395	// Scrolls the tab list to the left or right by 75% of the widget width.
396	// direction:
397	// If the direction is 1, the widget scrolls to the right, if it is -1,
398	// it scrolls to the left.
399
400	if(node && domClass.contains(node, "dijitTabDisabled")){
401	return;
402	}
403
404	var sWidth = domStyle.get(this.scrollNode, "width");
405	var d = (sWidth * 0.75) * direction;
406
407	var to = this._getScroll() + d;
408
409	this._setButtonClass(to);
410
411	this.createSmoothScroll(to).play();
412	},
413
414	_setButtonClass: function(/Number/ scroll){
415	// summary:
416	// Disables the left scroll button if the tabs are scrolled all the way to the left,
417	// or the right scroll button in the opposite case.
418	// scroll: Integer
419	// amount of horizontal scroll
420
421	var scrollBounds = this._getScrollBounds();
422	this._leftBtn.set("disabled", scroll <= scrollBounds.min);
423	this._rightBtn.set("disabled", scroll >= scrollBounds.max);
424	}
425	});
426
427
428	var ScrollingTabControllerButtonMixin = declare("dijit.layout._ScrollingTabControllerButtonMixin", null, {
429	baseClass: "dijitTab tabStripButton",
430
431	templateString: buttonTemplate,
432
433	// Override inherited tabIndex: 0 from dijit/form/Button, because user shouldn't be
434	// able to tab to the left/right/menu buttons
435	tabIndex: "",
436
437	// Similarly, override FormWidget.isFocusable() because clicking a button shouldn't focus it
438	// either (this override avoids focus() call in FormWidget.js)
439	isFocusable: function(){
440	return false;
441	}
442	});
443
444	// Class used in template
445	declare("dijit.layout._ScrollingTabControllerButton", [Button, ScrollingTabControllerButtonMixin]);
446
447	// Class used in template
448	declare("dijit.layout._ScrollingTabControllerMenuButton", [Button, _HasDropDown, ScrollingTabControllerButtonMixin], {
449	// id of the TabContainer itself
450	containerId: "",
451
452	// -1 so user can't tab into the button, but so that button can still be focused programatically.
453	// Because need to move focus to the button (or somewhere) before the menu is hidden or IE6 will crash.
454	tabIndex: "-1",
455
456	isLoaded: function(){
457	// recreate menu every time, in case the TabContainer's list of children (or their icons/labels) have changed
458	return false;
459	},
460
461	loadDropDown: function(callback){
462	this.dropDown = new Menu({
463	id: this.containerId + "_menu",
464	ownerDocument: this.ownerDocument,
465	dir: this.dir,
466	lang: this.lang,
467	textDir: this.textDir
468	});
469	var container = registry.byId(this.containerId);
470	array.forEach(container.getChildren(), function(page){
471	var menuItem = new MenuItem({
472	id: page.id + "_stcMi",
473	label: page.title,
474	iconClass: page.iconClass,
475	disabled: page.disabled,
476	ownerDocument: this.ownerDocument,
477	dir: page.dir,
478	lang: page.lang,
479	textDir: page.textDir \|\| container.textDir,
480	onClick: function(){
481	container.selectChild(page);
482	}
483	});
484	this.dropDown.addChild(menuItem);
485	}, this);
486	callback();
487	},
488
489	closeDropDown: function(/Boolean/ focus){
490	this.inherited(arguments);
491	if(this.dropDown){
492	this._popupStateNode.removeAttribute("aria-owns"); // remove ref to node that we are about to delete
493	this.dropDown.destroyRecursive();
494	delete this.dropDown;
495	}
496	}
497	});
498
499	return ScrollingTabController;
500	});

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