Workaround example page updated :
http://dev5.mapgears.com/openlayers/2.12-canvas-issue/examples/canvas-issue-workaround.html?renderer=Canvas
It has become a little bit trickier to select / unselect features now
that the tolerance is set to 0, naturally.
Alexandre
On 13-08-12 09:17 AM, Alexandre Dubé wrote:
Xavier,
You're right. Thanks for sharing your solutions. I think using
your workaround (locking the renderer on unselectAll) combined with a
tolerance of 0 could do the trick for me, but it would still be nice
to nail the cause of the issue.
I'll update my example.
Thanks again,
Alexandre
On 13-08-09 04:46 PM, Xavier Mamano (jorix) wrote:
Hi
But the problem remains when the clickout has a little drag before (less
than 4 pixels --see clickTolerance on OpenLayers.Handler.Feature--)
Try select the features, and unselect by: mousedown + mousemove (less
than 4
pixels) + mouseup. Oops!
Seems that "this.canvas.clearRect (0, 0, width, height);" on
Canvas.redraw
does not act a second time while the js code is still running.
Xavier
Xavier Mamano (jorix) wrote
Hi,
I tried your workaround...
It works on Chrome but not on FF.
And tried this:
select.unselectAll = function(options) {
vectors.renderer.locked = true;
OpenLayers.Control.SelectFeature.prototype.unselectAll.apply(
this, arguments);
vectors.renderer.locked = false;
vectors.moveTo(null, true, false); // to force a
vectors.redraw();
};
It works on FF & Chrome.
Xavier
Alexandre Dubé wrote
Hi,
Here's a pretty dirty workaround:
http://dev5.mapgears.com/openlayers/2.12-canvas-issue/examples/canvas-issue-workaround.html?renderer=Canvas
In summary, I redraw the layer after features were unselected.
I'm still not sure what's the cause of the issue, but I noticed
that
when calling the unselectAll method of the select control, each
feature
are drawn (using layer.drawFeature method) separately, resulting in
redrawing the layer X times for each feature that were unselected.
Maybe if the renderer was locked while unselecting all these it
could do
the trick.
Please, let me know if this should deserve an Issue opened.
Alexandre
On 13-08-07 01:14 PM, Alexandre Dubé wrote:
Thanks to everyone who tried the example. I'll try to can come up
with a fix or a workaround asap.
Alexandre
On 13-08-07 11:02 AM, Xavier Mamano (jorix) wrote:
Hi,
I can confirm seeing this using Windows Vista on Chrome, FF, IE9 and
Opera
and olso usign Ubuntu on Chome and FF.
(using your canvas-issue.html)
Xavier Mamano
Alexandre Dubé wrote
Hi,
I have an issue when I use Canvas as vector renderer in
addition
to
having externalGraphic properties. I noticed the issue using
OpenLayers
2.12, 2.13 and 2.13.1, with the 3 browsers I tested: Chrome,
Firefox
and
IE9.
I made a small demo to show the issue 'live':
http://dev5.mapgears.com/openlayers/2.12-canvas-issue/examples/canvas-issue.html?renderer=Canvas
Before trying to look deeper at the code to see what's
going on
wrong, I wonder if anyone already hit this same issue and came up
with a
fix / solution / workaround.
Many thanks,
Alexandre
P.S. The example's html file can be downloaded and added to any
local
examples folder in order to test it locally with different
versions of
OpenLayers, i.e. the images and externalGraphic links are absolute,
not
relative.
--
Alexandre Dubé
Mapgears
www.mapgears.com
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