basebuttonrepeater.lzx

<library>
   <include href="base/basebutton.lzx"/>

   <!-- A basebutton that sends an onmousestilldown event while the mouse is
        held down. -->
   <class name="basebuttonrepeater" extends="basebutton">
       <!---  @keywords private -->
       <attribute name="_lasttime" value="0" type="number"/>
       <!---  @keywords private -->
       <attribute name="stillDownDelegate" value="null" type="expression"/>
       <!---  @keywords private -->
       <attribute name="isMouseDown" value="false" type="boolean"/>

       <!--- @keywords public -->
       <event name="onmousestilldown"/>

       <!---  @keywords private -->
       <method name="stillDownEventGenerator" args="ignore">
            var now = (new Date()).getTime();
            var diff = now - this._lasttime;
            this._lasttime = now;

            if (this.isMouseDown) {
                var next;
                if (diff > 600) {
                    next = 500;
                } else {
                    next = 50;
                    this.onmousestilldown.sendEvent();
                }
                lz.Timer.resetTimer( this.stillDownDelegate, next );
            }
       </method>

       <!--- @keywords private -->
        <handler name="onmousedown">
            this._lasttime = (new Date()).getTime();
            this.isMouseDown = true;
            if (! this.stillDownDelegate) {
               this.stillDownDelegate = new LzDelegate( this, "stillDownEventGenerator" );
            }
            lz.Timer.addTimer( this.stillDownDelegate, 500 );
        </handler>

        <!--- @keywords private -->
        <handler name="onmouseup">
            this.isMouseDown = false;
            lz.Timer.removeTimer( this.stillDownDelegate );
        </handler>

        <doc>
          <tag name="shortdesc"><text>a basebutton that sends an event if the mouse is held down.</text></tag>
          <text>
            <p>This class is a simple extension of
            <classname>basebutton</classname>.  If the user holds the mouse button
            down over the button (for more than a half second), then an event
            <event>onmousestilldown</event> will be sent.  The
            <event>onmousestilldown</event> event will continue to be sent every
            50 milliseconds until the mouse button is released.</p>
          </text>
        </doc>
    </class>

</library>
<!-- * X_LZ_COPYRIGHT_BEGIN ***************************************************
* Copyright 2001-2009 Laszlo Systems, Inc.  All Rights Reserved.              *
* Use is subject to license terms.                                            *
* X_LZ_COPYRIGHT_END ****************************************************** -->
<!-- @LZX_VERSION@                                                         -->