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/**
* @class YAHOO.ext.BasicLayoutRegion
* @extends YAHOO.ext.util.Observable
* This class represents a lightweight region in a layout manager. This region does not move dom nodes
* and does not have a titlebar, tabs or any other features. All it does is size and position
* panels. To create a BasicLayoutRegion, add lightweight:true or basic:true to your regions config.
*/
YAHOO.ext.BasicLayoutRegion = function(mgr, config, pos, skipConfig){
this.mgr = mgr;
this.position = pos;
this.events = {
/**
* @event beforeremove
* Fires before a panel is removed (or closed). To cancel the removal set "e.cancel = true" on the event argument.
* @param {YAHOO.ext.LayoutRegion} this
* @param {YAHOO.ext.ContentPanel} panel The panel
* @param {Object} e The cancel event object
*/
'beforeremove' : true,
/**
* @event invalidated
* Fires when the layout for this region is changed.
* @param {YAHOO.ext.LayoutRegion} this
*/
'invalidated' : true,
/**
* @event visibilitychange
* Fires when this region is shown or hidden
* @param {YAHOO.ext.LayoutRegion} this
* @param {Boolean} visibility true or false
*/
'visibilitychange' : true,
/**
* @event paneladded
* Fires when a panel is added.
* @param {YAHOO.ext.LayoutRegion} this
* @param {YAHOO.ext.ContentPanel} panel The panel
*/
'paneladded' : true,
/**
* @event panelremoved
* Fires when a panel is removed.
* @param {YAHOO.ext.LayoutRegion} this
* @param {YAHOO.ext.ContentPanel} panel The panel
*/
'panelremoved' : true,
/**
* @event collapsed
* Fires when this region is collapsed.
* @param {YAHOO.ext.LayoutRegion} this
*/
'collapsed' : true,
/**
* @event expanded
* Fires when this region is expanded.
* @param {YAHOO.ext.LayoutRegion} this
*/
'expanded' : true,
/**
* @event panelactivated
* Fires when a panel is activated.
* @param {YAHOO.ext.LayoutRegion} this
* @param {YAHOO.ext.ContentPanel} panel The activated panel
*/
'panelactivated' : true,
/**
* @event resized
* Fires when the user resizes this region.
* @param {YAHOO.ext.LayoutRegion} this
* @param {Number} newSize The new size (width for east/west, height for north/south)
*/
'resized' : true
};
/** A collection of panels in this region. @type YAHOO.ext.util.MixedCollection */
this.panels = new YAHOO.ext.util.MixedCollection();
this.panels.getKey = this.getPanelId.createDelegate(this);
this.box = null;
this.activePanel = null;
if(skipConfig !== true){
this.applyConfig(config);
}
};
YAHOO.extendX(YAHOO.ext.BasicLayoutRegion, YAHOO.ext.util.Observable, {
getPanelId : function(p){
return p.getId();
},
applyConfig : function(config){
this.margins = config.margins || this.margins || {top: 0, left: 0, right:0, bottom: 0};
this.config = config;
},
/**
* Resizes the region to the specified size. For vertical regions (west, east) this adjusts
* the width, for horizontal (north, south) the height.
* @param {Number} newSize The new width or height
*/
resizeTo : function(newSize){
if(this.activePanel){
var el = this.activePanel.getEl();
switch(this.position){
case 'east':
case 'west':
el.setWidth(newSize);
this.fireEvent('resized', this, newSize);
break;
case 'north':
case 'south':
el.setHeight(newSize);
this.fireEvent('resized', this, newSize);
break;
}
}
},
getBox : function(){
return this.activePanel ? this.activePanel.getEl().getBox(false, true) : null;
},
getMargins : function(){
return this.margins;
},
updateBox : function(box){
this.box = box;
var el = this.activePanel.getEl();
el.dom.style.left = box.x + 'px';
el.dom.style.top = box.y + 'px';
el.setSize(box.width, box.height);
},
/**
* Returns the container element for this region.
* @return {YAHOO.ext.Element}
*/
getEl : function(){
return this.activePanel;
},
/**
* Returns true if this region is currently visible.
* @return {Boolean}
*/
isVisible : function(){
return this.activePanel ? true : false;
},
setActivePanel : function(panel){
panel = this.getPanel(panel);
if(this.activePanel && this.activePanel != panel){
this.activePanel.setActiveState(false);
this.activePanel.getEl().setStyle({left:-10000,right:-10000});
}
this.activePanel = panel;
panel.setActiveState(true);
if(this.box){
panel.setSize(this.box.width, this.box.height);
}
this.fireEvent('panelactivated', this, panel);
this.fireEvent('invalidated');
},
/**
* Show the specified panel.
* @param {Number/String/ContentPanel} panelId The panels index, id or the panel itself
* @return {YAHOO.ext.ContentPanel} The shown panel or null
*/
showPanel : function(panel){
if(panel = this.getPanel(panel)){
this.setActivePanel(panel);
}
return panel;
},
/**
* Get the active panel for this region.
* @return {YAHOO.ext.ContentPanel} The active panel or null
*/
getActivePanel : function(){
return this.activePanel;
},
/**
* Add the passed ContentPanel(s)
* @param {ContentPanel...} panel The ContentPanel(s) to add (you can pass more than one)
* @return {YAHOO.ext.ContentPanel} The panel added (if only one was added)
*/
add : function(panel){
if(arguments.length > 1){
for(var i = 0, len = arguments.length; i < len; i++) {
this.add(arguments[i]);
}
return null;
}
if(this.hasPanel(panel)){
this.showPanel(panel);
return panel;
}
panel.setRegion(this);
this.panels.add(panel);
panel.getEl().setStyle('position', 'absolute');
if(!panel.background){
this.setActivePanel(panel);
if(this.config.initialSize && this.panels.getCount()==1){
this.resizeTo(this.config.initialSize);
}
}
this.fireEvent('paneladded', this, panel);
return panel;
},
/**
* Returns true if the panel is in this region.
* @param {Number/String/ContentPanel} panel The panels index, id or the panel itself
* @return {Boolean}
*/
hasPanel : function(panel){
if(typeof panel == 'object'){ // must be panel obj
panel = panel.getId();
}
return this.getPanel(panel) ? true : false;
},
/**
* Removes the specified panel. If preservePanel is not true (either here or in the config), the panel is destroyed.
* @param {Number/String/ContentPanel} panel The panels index, id or the panel itself
* @param {Boolean} preservePanel Overrides the config preservePanel option
* @return {YAHOO.ext.ContentPanel} The panel that was removed
*/
remove : function(panel, preservePanel){
panel = this.getPanel(panel);
if(!panel){
return null;
}
var e = {};
this.fireEvent('beforeremove', this, panel, e);
if(e.cancel === true){
return null;
}
var panelId = panel.getId();
this.panels.removeKey(panelId);
return panel;
},
/**
* Returns the panel specified or null if it's not in this region.
* @param {Number/String/ContentPanel} panel The panels index, id or the panel itself
* @return {YAHOO.ext.ContentPanel}
*/
getPanel : function(id){
if(typeof id == 'object'){ // must be panel obj
return id;
}
return this.panels.get(id);
},
/**
* Returns this regions position (north/south/east/west/center).
* @return {String}
*/
getPosition: function(){
return this.position;
}
});
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