[OpenLayers-Users] drag zoom control images

[Eric Jarvies]

brad,

i went to http://mumbai.freemap.in/ , a site that also uses the zoom  
bar(the standard issue openlayers zoom bar), and i attempted to  
replicate the errors.   when holding down the mouse and moving the  
slider up and down the bar, after a few passes, the slider indeed  
leaves the outer limits of the bar.  upon release of the mouse, the  
slider will return to it's last position prior to clicking it.    
whereas on your site/example, if the indicator has moved outside of  
the bar area, either top or bottom, and the mouse is released, it  
will stay outside, and if the mouse is not clicked, it will continue  
moving, even if switching to another browser window, or another  
application all together.  upon returning to your map, the slider is  
still moving with the mouse, and the only way to make it return to  
the zoom bar is to mouse down again inside of the zoom bar area, and  
to move the mouse in the respective up or down direction to make the  
indicator move inside the bar area, or to simply click on the zoom  
bar, in which case the indicator returns to that position, then  
immediately jumps a few positions up or down.  so i think the bulk of  
the problem has to do with your you've structured your images within  
your <div> tags.  also, the openlayers default zoom bar is shorter  
then is the one you created.  perhaps you should also double check  
your px; values, to make sure everything corresponds.

once you make the above-mentioned fix, that will address the slider  
problem not returning to the zoom bar, as well as the slider jumping  
to another position on the zoom bar, and then your zoom bar/slider  
will be on par with the default zoom bar/slider.

but the underlying issue/bug will still remain, meaning, the slider  
is still leaving the zoom bar area when moused-down-and-holding-and- 
moving.  clearly, this error only occurs when the person  
intentionally mouses down and moves up or down out of range of the  
bar, so it is intentional by the user, thus it will not occur that  
often.  but, i would be remiss not to at least make mention of it, so  
that it can be corrected, as it seems like an easy fix.  should i  
file a ticket for this?  or is someone with capacity/repository  
access listening?


default openlayers zoom bar and slider:
<div id="OpenLayers_Control_PanZoomBar_Zoombarundefined"  
style="background-image: url(http://openlayers.org/api/2.2/img/ 
zoombar.png); left: 13px; top: 81px; width: 18px; height: 121px;  
position: absolute;"/>
<div id="OpenLayers_Control_PanZoomBar_Sliderundefined"  
style="position: absolute; left: 12px; top: 170px; width: 20px;  
height: 9px;">
<img id="OpenLayers_Control_PanZoomBar_Sliderundefined_innerImage"  
style="position: relative; width: 20px; height: 9px;" src="http:// 
openlayers.org/api/2.2/img/slider.png"/>

your zoom bar and slider:
<div id="OpenLayers_Control_PanZoomBar_ZoombarOpenLayers.Map_2"  
style="background-image: url(http://demo.cubewerx.com.au/openlayers/ 
OpenLayers-2.5/img/zoombar.png); left: 13px; top: 81px; width: 18px;  
height: 176px; position: absolute;"/>
<div id="OpenLayers_Control_PanZoomBar_SliderOpenLayers.Map_2"  
style="position: absolute; left: 12px; top: 203px; width: 20px;  
height: 9px;">
<img  
id="OpenLayers_Control_PanZoomBar_SliderOpenLayers.Map_2_innerImage"  
style="position: relative; width: 20px; height: 9px;" src="http:// 
demo.cubewerx.com.au/openlayers/OpenLayers-2.5/img/slider.png"/>

regards,

eric
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