window.js

一个struts和extjs得源码

            var force = this.mask.dom.offsetHeight;
            this.mask.setSize(Ext.lib.Dom.getViewWidth(true), Ext.lib.Dom.getViewHeight(true));
        }
        this.doConstrain();
    },

    // private
    doConstrain : function(){
        if(this.constrain || this.constrainHeader){
            var offsets;
            if(this.constrain){
                offsets = {
                    right:this.el.shadowOffset,
                    left:this.el.shadowOffset,
                    bottom:this.el.shadowOffset
                };
            }else {
                var s = this.getSize();
                offsets = {
                    right:-(s.width - 100),
                    bottom:-(s.height - 25)
                };
            }

            var xy = this.el.getConstrainToXY(this.container, true, offsets);
            if(xy){
                this.setPosition(xy[0], xy[1]);
            }
        }
    },

    // private - used for dragging
    ghost : function(cls){
        var ghost = this.createGhost(cls);
        var box = this.getBox(true);
        ghost.setLeftTop(box.x, box.y);
        ghost.setWidth(box.width);
        this.el.hide();
        this.activeGhost = ghost;
        return ghost;
    },

    // private
    unghost : function(show, matchPosition){
        if(show !== false){
            this.el.show();
            this.focus();
	        if(Ext.isMac && Ext.isGecko){ // work around stupid FF 2.0/Mac scroll bar bug
	        	this.cascade(this.setAutoScroll);
	        }
        }
        if(matchPosition !== false){
            this.setPosition(this.activeGhost.getLeft(true), this.activeGhost.getTop(true));
        }
        this.activeGhost.hide();
        this.activeGhost.remove();
        delete this.activeGhost;
    },

    /**
     * Placeholder method for minimizing the window.  By default, this method simply fires the {@link #minimize} event
     * since the behavior of minimizing a window is application-specific.  To implement custom minimize behavior,
     * either the minimize event can be handled or this method can be overridden.
     */
    minimize : function(){
        this.fireEvent('minimize', this);
    },

    /**
     * Closes the window, removes it from the DOM and destroys the window object.  The beforeclose event is fired
     * before the close happens and will cancel the close action if it returns false.
     */
    close : function(){
        if(this.fireEvent("beforeclose", this) !== false){
            this.hide(null, function(){
                this.fireEvent('close', this);
                this.destroy();
            }, this);
        }
    },

    /**
     * Fits the window within its current container and automatically replaces the 'maximize' tool button with
     * the 'restore' tool button.
     */
    maximize : function(){
        if(!this.maximized){
            this.expand(false);
            this.restoreSize = this.getSize();
            this.restorePos = this.getPosition(true);
            if (this.maximizable){
                this.tools.maximize.hide();
                this.tools.restore.show();
            }
            this.maximized = true;
            this.el.disableShadow();

            if(this.dd){
                this.dd.lock();
            }
            if(this.collapsible){
                this.tools.toggle.hide();
            }
            this.el.addClass('x-window-maximized');
            this.container.addClass('x-window-maximized-ct');

            this.setPosition(0, 0);
            this.fitContainer();
            this.fireEvent('maximize', this);
        }
    },

    /**
     * Restores a maximized window back to its original size and position prior to being maximized and also replaces
     * the 'restore' tool button with the 'maximize' tool button.
     */
    restore : function(){
        if(this.maximized){
            this.el.removeClass('x-window-maximized');
            this.tools.restore.hide();
            this.tools.maximize.show();
            this.setPosition(this.restorePos[0], this.restorePos[1]);
            this.setSize(this.restoreSize.width, this.restoreSize.height);
            delete this.restorePos;
            delete this.restoreSize;
            this.maximized = false;
            this.el.enableShadow(true);

            if(this.dd){
                this.dd.unlock();
            }
            if(this.collapsible){
                this.tools.toggle.show();
            }
            this.container.removeClass('x-window-maximized-ct');

            this.doConstrain();
            this.fireEvent('restore', this);
        }
    },

    /**
     * A shortcut method for toggling between {@link #maximize} and {@link #restore} based on the current maximized
     * state of the window.
     */
    toggleMaximize : function(){
        this[this.maximized ? 'restore' : 'maximize']();
    },

    // private
    fitContainer : function(){
        var vs = this.container.getViewSize();
        this.setSize(vs.width, vs.height);
    },

    // private
    // z-index is managed by the WindowManager and may be overwritten at any time
    setZIndex : function(index){
        if(this.modal){
            this.mask.setStyle("z-index", index);
        }
        this.el.setZIndex(++index);
        index += 5;

        if(this.resizer){
            this.resizer.proxy.setStyle("z-index", ++index);
        }

        this.lastZIndex = index;
    },

    /**
     * Aligns the window to the specified element
     * @param {Mixed} element The element to align to.
     * @param {String} position The position to align to (see {@link Ext.Element#alignTo} for more details).
     * @param {Array} offsets (optional) Offset the positioning by [x, y]
     * @return {Ext.Window} this
     */
    alignTo : function(element, position, offsets){
        var xy = this.el.getAlignToXY(element, position, offsets);
        this.setPagePosition(xy[0], xy[1]);
        return this;
    },

    /**
     * Anchors this window to another element and realigns it when the window is resized or scrolled.
     * @param {Mixed} element The element to align to.
     * @param {String} position The position to align to (see {@link Ext.Element#alignTo} for more details)
     * @param {Array} offsets (optional) Offset the positioning by [x, y]
     * @param {Boolean/Number} monitorScroll (optional) true to monitor body scroll and reposition. If this parameter
     * is a number, it is used as the buffer delay (defaults to 50ms).
     * @return {Ext.Window} this
     */
    anchorTo : function(el, alignment, offsets, monitorScroll){
      if(this.doAnchor){
          Ext.EventManager.removeResizeListener(this.doAnchor, this);
          Ext.EventManager.un(window, 'scroll', this.doAnchor, this);
      }
      this.doAnchor = function(){
          this.alignTo(el, alignment, offsets);
      };
      Ext.EventManager.onWindowResize(this.doAnchor, this);
      
      var tm = typeof monitorScroll;
      if(tm != 'undefined'){
          Ext.EventManager.on(window, 'scroll', this.doAnchor, this,
              {buffer: tm == 'number' ? monitorScroll : 50});
      }
      this.doAnchor();
      return this;
    },

    /**
     * Brings this window to the front of any other visible windows
     * @return {Ext.Window} this
     */
    toFront : function(e){
        if(this.manager.bringToFront(this)){
            if(!e || !e.getTarget().focus){
                this.focus();
            }
        }
        return this;
    },

    /**
     * Makes this the active window by showing its shadow, or deactivates it by hiding its shadow.  This method also
     * fires the {@link #activate} or {@link #deactivate} event depending on which action occurred.
     * @param {Boolean} active True to activate the window, false to deactivate it (defaults to false)
     */
    setActive : function(active){
        if(active){
            if(!this.maximized){
                this.el.enableShadow(true);
            }
            this.fireEvent('activate', this);
        }else{
            this.el.disableShadow();
            this.fireEvent('deactivate', this);
        }
    },

    /**
     * Sends this window to the back of (lower z-index than) any other visible windows
     * @return {Ext.Window} this
     */
    toBack : function(){
        this.manager.sendToBack(this);
        return this;
    },

    /**
     * Centers this window in the viewport
     * @return {Ext.Window} this
     */
    center : function(){
        var xy = this.el.getAlignToXY(this.container, 'c-c');
        this.setPagePosition(xy[0], xy[1]);
        return this;
    }

    /**
     * @cfg {Boolean} autoWidth @hide
     **/
});
Ext.reg('window', Ext.Window);

// private - custom Window DD implementation
Ext.Window.DD = function(win){
    this.win = win;
    Ext.Window.DD.superclass.constructor.call(this, win.el.id, 'WindowDD-'+win.id);
    this.setHandleElId(win.header.id);
    this.scroll = false;
};

Ext.extend(Ext.Window.DD, Ext.dd.DD, {
    moveOnly:true,
    headerOffsets:[100, 25],
    startDrag : function(){
        var w = this.win;
        this.proxy = w.ghost();
        if(w.constrain !== false){
            var so = w.el.shadowOffset;
            this.constrainTo(w.container, {right: so, left: so, bottom: so});
        }else if(w.constrainHeader !== false){
            var s = this.proxy.getSize();
            this.constrainTo(w.container, {right: -(s.width-this.headerOffsets[0]), bottom: -(s.height-this.headerOffsets[1])});
        }
    },
    b4Drag : Ext.emptyFn,

    onDrag : function(e){
        this.alignElWithMouse(this.proxy, e.getPageX(), e.getPageY());
    },

    endDrag : function(e){
        this.win.unghost();
        this.win.saveState();
    }
});