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+ <pre class="prettyprint lang-js"><span id='Ext-layout-container-boxOverflow-Scroller'>/**
+</span> * @class Ext.layout.container.boxOverflow.Scroller
+ * @extends Ext.layout.container.boxOverflow.None
+ * @private
+ */
+Ext.define('Ext.layout.container.boxOverflow.Scroller', {
+
+ /* Begin Definitions */
+
+ extend: 'Ext.layout.container.boxOverflow.None',
+ requires: ['Ext.util.ClickRepeater', 'Ext.core.Element'],
+ alternateClassName: 'Ext.layout.boxOverflow.Scroller',
+ mixins: {
+ observable: 'Ext.util.Observable'
+ },
+
+ /* End Definitions */
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-animateScroll'> /**
+</span> * @cfg {Boolean} animateScroll
+ * True to animate the scrolling of items within the layout (defaults to true, ignored if enableScroll is false)
+ */
+ animateScroll: false,
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-scrollIncrement'> /**
+</span> * @cfg {Number} scrollIncrement
+ * The number of pixels to scroll by on scroller click (defaults to 24)
+ */
+ scrollIncrement: 20,
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-wheelIncrement'> /**
+</span> * @cfg {Number} wheelIncrement
+ * The number of pixels to increment on mouse wheel scrolling (defaults to <tt>3</tt>).
+ */
+ wheelIncrement: 10,
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-scrollRepeatInterval'> /**
+</span> * @cfg {Number} scrollRepeatInterval
+ * Number of milliseconds between each scroll while a scroller button is held down (defaults to 20)
+ */
+ scrollRepeatInterval: 60,
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-scrollDuration'> /**
+</span> * @cfg {Number} scrollDuration
+ * Number of milliseconds that each scroll animation lasts (defaults to 400)
+ */
+ scrollDuration: 400,
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-beforeCtCls'> /**
+</span> * @cfg {String} beforeCtCls
+ * CSS class added to the beforeCt element. This is the element that holds any special items such as scrollers,
+ * which must always be present at the leftmost edge of the Container
+ */
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-afterCtCls'> /**
+</span> * @cfg {String} afterCtCls
+ * CSS class added to the afterCt element. This is the element that holds any special items such as scrollers,
+ * which must always be present at the rightmost edge of the Container
+ */
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-scrollerCls'> /**
+</span> * @cfg {String} scrollerCls
+ * CSS class added to both scroller elements if enableScroll is used
+ */
+ scrollerCls: Ext.baseCSSPrefix + 'box-scroller',
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-beforeScrollerCls'> /**
+</span> * @cfg {String} beforeScrollerCls
+ * CSS class added to the left scroller element if enableScroll is used
+ */
+
+<span id='Ext-layout-container-boxOverflow-Scroller-cfg-afterScrollerCls'> /**
+</span> * @cfg {String} afterScrollerCls
+ * CSS class added to the right scroller element if enableScroll is used
+ */
+
+ constructor: function(layout, config) {
+ this.layout = layout;
+ Ext.apply(this, config || {});
+
+ this.addEvents(
+<span id='Ext-layout-container-boxOverflow-Scroller-event-scroll'> /**
+</span> * @event scroll
+ * @param {Ext.layout.container.boxOverflow.Scroller} scroller The layout scroller
+ * @param {Number} newPosition The new position of the scroller
+ * @param {Boolean/Object} animate If animating or not. If true, it will be a animation configuration, else it will be false
+ */
+ 'scroll'
+ );
+ },
+
+ initCSSClasses: function() {
+ var me = this,
+ layout = me.layout;
+
+ if (!me.CSSinitialized) {
+ me.beforeCtCls = me.beforeCtCls || Ext.baseCSSPrefix + 'box-scroller-' + layout.parallelBefore;
+ me.afterCtCls = me.afterCtCls || Ext.baseCSSPrefix + 'box-scroller-' + layout.parallelAfter;
+ me.beforeScrollerCls = me.beforeScrollerCls || Ext.baseCSSPrefix + layout.owner.getXType() + '-scroll-' + layout.parallelBefore;
+ me.afterScrollerCls = me.afterScrollerCls || Ext.baseCSSPrefix + layout.owner.getXType() + '-scroll-' + layout.parallelAfter;
+ me.CSSinitializes = true;
+ }
+ },
+
+ handleOverflow: function(calculations, targetSize) {
+ var me = this,
+ layout = me.layout,
+ methodName = 'get' + layout.parallelPrefixCap,
+ newSize = {};
+
+ me.initCSSClasses();
+ me.callParent(arguments);
+ this.createInnerElements();
+ this.showScrollers();
+ newSize[layout.perpendicularPrefix] = targetSize[layout.perpendicularPrefix];
+ newSize[layout.parallelPrefix] = targetSize[layout.parallelPrefix] - (me.beforeCt[methodName]() + me.afterCt[methodName]());
+ return { targetSize: newSize };
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-createInnerElements'> /**
+</span> * @private
+ * Creates the beforeCt and afterCt elements if they have not already been created
+ */
+ createInnerElements: function() {
+ var me = this,
+ target = me.layout.getRenderTarget();
+
+ //normal items will be rendered to the innerCt. beforeCt and afterCt allow for fixed positioning of
+ //special items such as scrollers or dropdown menu triggers
+ if (!me.beforeCt) {
+ target.addCls(Ext.baseCSSPrefix + me.layout.direction + '-box-overflow-body');
+ me.beforeCt = target.insertSibling({cls: Ext.layout.container.Box.prototype.innerCls + ' ' + me.beforeCtCls}, 'before');
+ me.afterCt = target.insertSibling({cls: Ext.layout.container.Box.prototype.innerCls + ' ' + me.afterCtCls}, 'after');
+ me.createWheelListener();
+ }
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-createWheelListener'> /**
+</span> * @private
+ * Sets up an listener to scroll on the layout's innerCt mousewheel event
+ */
+ createWheelListener: function() {
+ this.layout.innerCt.on({
+ scope : this,
+ mousewheel: function(e) {
+ e.stopEvent();
+
+ this.scrollBy(e.getWheelDelta() * this.wheelIncrement * -1, false);
+ }
+ });
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-clearOverflow'> /**
+</span> * @private
+ */
+ clearOverflow: function() {
+ this.hideScrollers();
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-showScrollers'> /**
+</span> * @private
+ * Shows the scroller elements in the beforeCt and afterCt. Creates the scrollers first if they are not already
+ * present.
+ */
+ showScrollers: function() {
+ this.createScrollers();
+ this.beforeScroller.show();
+ this.afterScroller.show();
+ this.updateScrollButtons();
+
+ this.layout.owner.addClsWithUI('scroller');
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-hideScrollers'> /**
+</span> * @private
+ * Hides the scroller elements in the beforeCt and afterCt
+ */
+ hideScrollers: function() {
+ if (this.beforeScroller != undefined) {
+ this.beforeScroller.hide();
+ this.afterScroller.hide();
+
+ this.layout.owner.removeClsWithUI('scroller');
+ }
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-createScrollers'> /**
+</span> * @private
+ * Creates the clickable scroller elements and places them into the beforeCt and afterCt
+ */
+ createScrollers: function() {
+ if (!this.beforeScroller && !this.afterScroller) {
+ var before = this.beforeCt.createChild({
+ cls: Ext.String.format("{0} {1} ", this.scrollerCls, this.beforeScrollerCls)
+ });
+
+ var after = this.afterCt.createChild({
+ cls: Ext.String.format("{0} {1}", this.scrollerCls, this.afterScrollerCls)
+ });
+
+ before.addClsOnOver(this.beforeScrollerCls + '-hover');
+ after.addClsOnOver(this.afterScrollerCls + '-hover');
+
+ before.setVisibilityMode(Ext.core.Element.DISPLAY);
+ after.setVisibilityMode(Ext.core.Element.DISPLAY);
+
+ this.beforeRepeater = Ext.create('Ext.util.ClickRepeater', before, {
+ interval: this.scrollRepeatInterval,
+ handler : this.scrollLeft,
+ scope : this
+ });
+
+ this.afterRepeater = Ext.create('Ext.util.ClickRepeater', after, {
+ interval: this.scrollRepeatInterval,
+ handler : this.scrollRight,
+ scope : this
+ });
+
+<span id='Ext-layout-container-boxOverflow-Scroller-property-beforeScroller'> /**
+</span> * @property beforeScroller
+ * @type Ext.core.Element
+ * The left scroller element. Only created when needed.
+ */
+ this.beforeScroller = before;
+
+<span id='Ext-layout-container-boxOverflow-Scroller-property-afterScroller'> /**
+</span> * @property afterScroller
+ * @type Ext.core.Element
+ * The left scroller element. Only created when needed.
+ */
+ this.afterScroller = after;
+ }
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-destroy'> /**
+</span> * @private
+ */
+ destroy: function() {
+ Ext.destroy(this.beforeRepeater, this.afterRepeater, this.beforeScroller, this.afterScroller, this.beforeCt, this.afterCt);
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-scrollBy'> /**
+</span> * @private
+ * Scrolls left or right by the number of pixels specified
+ * @param {Number} delta Number of pixels to scroll to the right by. Use a negative number to scroll left
+ */
+ scrollBy: function(delta, animate) {
+ this.scrollTo(this.getScrollPosition() + delta, animate);
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-getScrollAnim'> /**
+</span> * @private
+ * @return {Object} Object passed to scrollTo when scrolling
+ */
+ getScrollAnim: function() {
+ return {
+ duration: this.scrollDuration,
+ callback: this.updateScrollButtons,
+ scope : this
+ };
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-updateScrollButtons'> /**
+</span> * @private
+ * Enables or disables each scroller button based on the current scroll position
+ */
+ updateScrollButtons: function() {
+ if (this.beforeScroller == undefined || this.afterScroller == undefined) {
+ return;
+ }
+
+ var beforeMeth = this.atExtremeBefore() ? 'addCls' : 'removeCls',
+ afterMeth = this.atExtremeAfter() ? 'addCls' : 'removeCls',
+ beforeCls = this.beforeScrollerCls + '-disabled',
+ afterCls = this.afterScrollerCls + '-disabled';
+
+ this.beforeScroller[beforeMeth](beforeCls);
+ this.afterScroller[afterMeth](afterCls);
+ this.scrolling = false;
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-atExtremeBefore'> /**
+</span> * @private
+ * Returns true if the innerCt scroll is already at its left-most point
+ * @return {Boolean} True if already at furthest left point
+ */
+ atExtremeBefore: function() {
+ return this.getScrollPosition() === 0;
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-scrollLeft'> /**
+</span> * @private
+ * Scrolls to the left by the configured amount
+ */
+ scrollLeft: function() {
+ this.scrollBy(-this.scrollIncrement, false);
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-scrollRight'> /**
+</span> * @private
+ * Scrolls to the right by the configured amount
+ */
+ scrollRight: function() {
+ this.scrollBy(this.scrollIncrement, false);
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-getScrollPosition'> /**
+</span> * Returns the current scroll position of the innerCt element
+ * @return {Number} The current scroll position
+ */
+ getScrollPosition: function(){
+ var layout = this.layout;
+ return parseInt(layout.innerCt.dom['scroll' + layout.parallelBeforeCap], 10) || 0;
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-getMaxScrollPosition'> /**
+</span> * @private
+ * Returns the maximum value we can scrollTo
+ * @return {Number} The max scroll value
+ */
+ getMaxScrollPosition: function() {
+ var layout = this.layout;
+ return layout.innerCt.dom['scroll' + layout.parallelPrefixCap] - this.layout.innerCt['get' + layout.parallelPrefixCap]();
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-atExtremeAfter'> /**
+</span> * @private
+ * Returns true if the innerCt scroll is already at its right-most point
+ * @return {Boolean} True if already at furthest right point
+ */
+ atExtremeAfter: function() {
+ return this.getScrollPosition() >= this.getMaxScrollPosition();
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-scrollTo'> /**
+</span> * @private
+ * Scrolls to the given position. Performs bounds checking.
+ * @param {Number} position The position to scroll to. This is constrained.
+ * @param {Boolean} animate True to animate. If undefined, falls back to value of this.animateScroll
+ */
+ scrollTo: function(position, animate) {
+ var me = this,
+ layout = me.layout,
+ oldPosition = me.getScrollPosition(),
+ newPosition = Ext.Number.constrain(position, 0, me.getMaxScrollPosition());
+
+ if (newPosition != oldPosition && !me.scrolling) {
+ if (animate == undefined) {
+ animate = me.animateScroll;
+ }
+
+ layout.innerCt.scrollTo(layout.parallelBefore, newPosition, animate ? me.getScrollAnim() : false);
+ if (animate) {
+ me.scrolling = true;
+ } else {
+ me.scrolling = false;
+ me.updateScrollButtons();
+ }
+
+ me.fireEvent('scroll', me, newPosition, animate ? me.getScrollAnim() : false);
+ }
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-scrollToItem'> /**
+</span> * Scrolls to the given component.
+ * @param {String|Number|Ext.Component} item The item to scroll to. Can be a numerical index, component id
+ * or a reference to the component itself.
+ * @param {Boolean} animate True to animate the scrolling
+ */
+ scrollToItem: function(item, animate) {
+ var me = this,
+ layout = me.layout,
+ visibility,
+ box,
+ newPos;
+
+ item = me.getItem(item);
+ if (item != undefined) {
+ visibility = this.getItemVisibility(item);
+ if (!visibility.fullyVisible) {
+ box = item.getBox(true, true);
+ newPos = box[layout.parallelPosition];
+ if (visibility.hiddenEnd) {
+ newPos -= (this.layout.innerCt['get' + layout.parallelPrefixCap]() - box[layout.parallelPrefix]);
+ }
+ this.scrollTo(newPos, animate);
+ }
+ }
+ },
+
+<span id='Ext-layout-container-boxOverflow-Scroller-method-getItemVisibility'> /**
+</span> * @private
+ * For a given item in the container, return an object with information on whether the item is visible
+ * with the current innerCt scroll value.
+ * @param {Ext.Component} item The item
+ * @return {Object} Values for fullyVisible, hiddenStart and hiddenEnd
+ */
+ getItemVisibility: function(item) {
+ var me = this,
+ box = me.getItem(item).getBox(true, true),
+ layout = me.layout,
+ itemStart = box[layout.parallelPosition],
+ itemEnd = itemStart + box[layout.parallelPrefix],
+ scrollStart = me.getScrollPosition(),
+ scrollEnd = scrollStart + layout.innerCt['get' + layout.parallelPrefixCap]();
+
+ return {
+ hiddenStart : itemStart < scrollStart,
+ hiddenEnd : itemEnd > scrollEnd,
+ fullyVisible: itemStart > scrollStart && itemEnd < scrollEnd
+ };
+ }
+});</pre>
+</body>
+</html>
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