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tt-rss/lib/dijit/_HasDropDown.js

444 lines
14 KiB
JavaScript

/*
Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
if(!dojo._hasResource["dijit._HasDropDown"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dijit._HasDropDown"] = true;
dojo.provide("dijit._HasDropDown");
dojo.require("dijit._Widget");
dojo.declare("dijit._HasDropDown",
null,
{
// summary:
// Mixin for widgets that need drop down ability.
// _buttonNode: [protected] DomNode
// The button/icon/node to click to display the drop down.
// Can be set via a dojoAttachPoint assignment.
// If missing, then either focusNode or domNode (if focusNode is also missing) will be used.
_buttonNode: null,
// _arrowWrapperNode: [protected] DomNode
// Will set CSS class dijitUpArrow, dijitDownArrow, dijitRightArrow etc. on this node depending
// on where the drop down is set to be positioned.
// Can be set via a dojoAttachPoint assignment.
// If missing, then _buttonNode will be used.
_arrowWrapperNode: null,
// _popupStateNode: [protected] DomNode
// The node to set the popupActive class on.
// Can be set via a dojoAttachPoint assignment.
// If missing, then focusNode or _buttonNode (if focusNode is missing) will be used.
_popupStateNode: null,
// _aroundNode: [protected] DomNode
// The node to display the popup around.
// Can be set via a dojoAttachPoint assignment.
// If missing, then domNode will be used.
_aroundNode: null,
// dropDown: [protected] Widget
// The widget to display as a popup. This widget *must* be
// defined before the startup function is called.
dropDown: null,
// autoWidth: [protected] Boolean
// Set to true to make the drop down at least as wide as this
// widget. Set to false if the drop down should just be its
// default width
autoWidth: true,
// forceWidth: [protected] Boolean
// Set to true to make the drop down exactly as wide as this
// widget. Overrides autoWidth.
forceWidth: false,
// maxHeight: [protected] Integer
// The max height for our dropdown.
// Any dropdown taller than this will have scrollbars.
// Set to 0 for no max height, or -1 to limit height to available space in viewport
maxHeight: 0,
// dropDownPosition: [const] String[]
// This variable controls the position of the drop down.
// It's an array of strings with the following values:
//
// * before: places drop down to the left of the target node/widget, or to the right in
// the case of RTL scripts like Hebrew and Arabic
// * after: places drop down to the right of the target node/widget, or to the left in
// the case of RTL scripts like Hebrew and Arabic
// * above: drop down goes above target node
// * below: drop down goes below target node
//
// The list is positions is tried, in order, until a position is found where the drop down fits
// within the viewport.
//
dropDownPosition: ["below","above"],
// _stopClickEvents: Boolean
// When set to false, the click events will not be stopped, in
// case you want to use them in your subwidget
_stopClickEvents: true,
_onDropDownMouseDown: function(/*Event*/ e){
// summary:
// Callback when the user mousedown's on the arrow icon
if(this.disabled || this.readOnly){ return; }
dojo.stopEvent(e);
this._docHandler = this.connect(dojo.doc, "onmouseup", "_onDropDownMouseUp");
this.toggleDropDown();
},
_onDropDownMouseUp: function(/*Event?*/ e){
// summary:
// Callback when the user lifts their mouse after mouse down on the arrow icon.
// If the drop is a simple menu and the mouse is over the menu, we execute it, otherwise, we focus our
// dropDown node. If the event is missing, then we are not
// a mouseup event.
//
// This is useful for the common mouse movement pattern
// with native browser <select> nodes:
// 1. mouse down on the select node (probably on the arrow)
// 2. move mouse to a menu item while holding down the mouse button
// 3. mouse up. this selects the menu item as though the user had clicked it.
if(e && this._docHandler){
this.disconnect(this._docHandler);
}
var dropDown = this.dropDown, overMenu = false;
if(e && this._opened){
// This code deals with the corner-case when the drop down covers the original widget,
// because it's so large. In that case mouse-up shouldn't select a value from the menu.
// Find out if our target is somewhere in our dropdown widget,
// but not over our _buttonNode (the clickable node)
var c = dojo.position(this._buttonNode, true);
if(!(e.pageX >= c.x && e.pageX <= c.x + c.w) ||
!(e.pageY >= c.y && e.pageY <= c.y + c.h)){
var t = e.target;
while(t && !overMenu){
if(dojo.hasClass(t, "dijitPopup")){
overMenu = true;
}else{
t = t.parentNode;
}
}
if(overMenu){
t = e.target;
if(dropDown.onItemClick){
var menuItem;
while(t && !(menuItem = dijit.byNode(t))){
t = t.parentNode;
}
if(menuItem && menuItem.onClick && menuItem.getParent){
menuItem.getParent().onItemClick(menuItem, e);
}
}
return;
}
}
}
if(this._opened && dropDown.focus && dropDown.autoFocus !== false){
// Focus the dropdown widget - do it on a delay so that we
// don't steal our own focus.
window.setTimeout(dojo.hitch(dropDown, "focus"), 1);
}
},
_onDropDownClick: function(/*Event*/ e){
// the drop down was already opened on mousedown/keydown; just need to call stopEvent()
if(this._stopClickEvents){
dojo.stopEvent(e);
}
},
buildRendering: function(){
this.inherited(arguments);
this._buttonNode = this._buttonNode || this.focusNode || this.domNode;
this._popupStateNode = this._popupStateNode || this.focusNode || this._buttonNode;
// Add a class to the "dijitDownArrowButton" type class to _buttonNode so theme can set direction of arrow
// based on where drop down will normally appear
var defaultPos = {
"after" : this.isLeftToRight() ? "Right" : "Left",
"before" : this.isLeftToRight() ? "Left" : "Right",
"above" : "Up",
"below" : "Down",
"left" : "Left",
"right" : "Right"
}[this.dropDownPosition[0]] || this.dropDownPosition[0] || "Down";
dojo.addClass(this._arrowWrapperNode || this._buttonNode, "dijit" + defaultPos + "ArrowButton");
},
postCreate: function(){
// summary:
// set up nodes and connect our mouse and keypress events
this.inherited(arguments);
this.connect(this._buttonNode, "onmousedown", "_onDropDownMouseDown");
this.connect(this._buttonNode, "onclick", "_onDropDownClick");
this.connect(this.focusNode, "onkeypress", "_onKey");
this.connect(this.focusNode, "onkeyup", "_onKeyUp");
},
destroy: function(){
if(this.dropDown){
// Destroy the drop down, unless it's already been destroyed. This can happen because
// the drop down is a direct child of <body> even though it's logically my child.
if(!this.dropDown._destroyed){
this.dropDown.destroyRecursive();
}
delete this.dropDown;
}
this.inherited(arguments);
},
_onKey: function(/*Event*/ e){
// summary:
// Callback when the user presses a key while focused on the button node
if(this.disabled || this.readOnly){ return; }
var d = this.dropDown, target = e.target;
if(d && this._opened && d.handleKey){
if(d.handleKey(e) === false){
/* false return code means that the drop down handled the key */
dojo.stopEvent(e);
return;
}
}
if(d && this._opened && e.charOrCode == dojo.keys.ESCAPE){
this.closeDropDown();
dojo.stopEvent(e);
}else if(!this._opened &&
(e.charOrCode == dojo.keys.DOWN_ARROW ||
( (e.charOrCode == dojo.keys.ENTER || e.charOrCode == " ") &&
//ignore enter and space if the event is for a text input
((target.tagName || "").toLowerCase() !== 'input' ||
(target.type && target.type.toLowerCase() !== 'text'))))){
// Toggle the drop down, but wait until keyup so that the drop down doesn't
// get a stray keyup event, or in the case of key-repeat (because user held
// down key for too long), stray keydown events
this._toggleOnKeyUp = true;
dojo.stopEvent(e);
}
},
_onKeyUp: function(){
if(this._toggleOnKeyUp){
delete this._toggleOnKeyUp;
this.toggleDropDown();
var d = this.dropDown; // drop down may not exist until toggleDropDown() call
if(d && d.focus){
setTimeout(dojo.hitch(d, "focus"), 1);
}
}
},
_onBlur: function(){
// summary:
// Called magically when focus has shifted away from this widget and it's dropdown
// Don't focus on button if the user has explicitly focused on something else (happens
// when user clicks another control causing the current popup to close)..
// But if focus is inside of the drop down then reset focus to me, because IE doesn't like
// it when you display:none a node with focus.
var focusMe = dijit._curFocus && this.dropDown && dojo.isDescendant(dijit._curFocus, this.dropDown.domNode);
this.closeDropDown(focusMe);
this.inherited(arguments);
},
isLoaded: function(){
// summary:
// Returns whether or not the dropdown is loaded. This can
// be overridden in order to force a call to loadDropDown().
// tags:
// protected
return true;
},
loadDropDown: function(/* Function */ loadCallback){
// summary:
// Loads the data for the dropdown, and at some point, calls
// the given callback. This is basically a callback when the
// user presses the down arrow button to open the drop down.
// tags:
// protected
loadCallback();
},
toggleDropDown: function(){
// summary:
// Callback when the user presses the down arrow button or presses
// the down arrow key to open/close the drop down.
// Toggle the drop-down widget; if it is up, close it, if not, open it
// tags:
// protected
if(this.disabled || this.readOnly){ return; }
if(!this._opened){
// If we aren't loaded, load it first so there isn't a flicker
if(!this.isLoaded()){
this.loadDropDown(dojo.hitch(this, "openDropDown"));
return;
}else{
this.openDropDown();
}
}else{
this.closeDropDown();
}
},
openDropDown: function(){
// summary:
// Opens the dropdown for this widget. To be called only when this.dropDown
// has been created and is ready to display (ie, it's data is loaded).
// returns:
// return value of dijit.popup.open()
// tags:
// protected
var dropDown = this.dropDown,
ddNode = dropDown.domNode,
aroundNode = this._aroundNode || this.domNode,
self = this;
// Prepare our popup's height and honor maxHeight if it exists.
// TODO: isn't maxHeight dependent on the return value from dijit.popup.open(),
// ie, dependent on how much space is available (BK)
if(!this._preparedNode){
this._preparedNode = true;
// Check if we have explicitly set width and height on the dropdown widget dom node
if(ddNode.style.width){
this._explicitDDWidth = true;
}
if(ddNode.style.height){
this._explicitDDHeight = true;
}
}
// Code for resizing dropdown (height limitation, or increasing width to match my width)
if(this.maxHeight || this.forceWidth || this.autoWidth){
var myStyle = {
display: "",
visibility: "hidden"
};
if(!this._explicitDDWidth){
myStyle.width = "";
}
if(!this._explicitDDHeight){
myStyle.height = "";
}
dojo.style(ddNode, myStyle);
// Figure out maximum height allowed (if there is a height restriction)
var maxHeight = this.maxHeight;
if(maxHeight == -1){
// limit height to space available in viewport either above or below my domNode
// (whichever side has more room)
var viewport = dojo.window.getBox(),
position = dojo.position(aroundNode, false);
maxHeight = Math.floor(Math.max(position.y, viewport.h - (position.y + position.h)));
}
// Attach dropDown to DOM and make make visibility:hidden rather than display:none
// so we call startup() and also get the size
if(dropDown.startup && !dropDown._started){
dropDown.startup();
}
dijit.popup.moveOffScreen(dropDown);
// Get size of drop down, and determine if vertical scroll bar needed
var mb = dojo._getMarginSize(ddNode);
var overHeight = (maxHeight && mb.h > maxHeight);
dojo.style(ddNode, {
overflowX: "hidden",
overflowY: overHeight ? "auto" : "hidden"
});
if(overHeight){
mb.h = maxHeight;
if("w" in mb){
mb.w += 16; // room for vertical scrollbar
}
}else{
delete mb.h;
}
// Adjust dropdown width to match or be larger than my width
if(this.forceWidth){
mb.w = aroundNode.offsetWidth;
}else if(this.autoWidth){
mb.w = Math.max(mb.w, aroundNode.offsetWidth);
}else{
delete mb.w;
}
// And finally, resize the dropdown to calculated height and width
if(dojo.isFunction(dropDown.resize)){
dropDown.resize(mb);
}else{
dojo.marginBox(ddNode, mb);
}
}
var retVal = dijit.popup.open({
parent: this,
popup: dropDown,
around: aroundNode,
orient: dijit.getPopupAroundAlignment((this.dropDownPosition && this.dropDownPosition.length) ? this.dropDownPosition : ["below"],this.isLeftToRight()),
onExecute: function(){
self.closeDropDown(true);
},
onCancel: function(){
self.closeDropDown(true);
},
onClose: function(){
dojo.attr(self._popupStateNode, "popupActive", false);
dojo.removeClass(self._popupStateNode, "dijitHasDropDownOpen");
self._opened = false;
}
});
dojo.attr(this._popupStateNode, "popupActive", "true");
dojo.addClass(self._popupStateNode, "dijitHasDropDownOpen");
this._opened=true;
// TODO: set this.checked and call setStateClass(), to affect button look while drop down is shown
return retVal;
},
closeDropDown: function(/*Boolean*/ focus){
// summary:
// Closes the drop down on this widget
// focus:
// If true, refocuses the button widget
// tags:
// protected
if(this._opened){
if(focus){ this.focus(); }
dijit.popup.close(this.dropDown);
this._opened = false;
}
}
}
);
}