[OpenLayers-Users] Combining hide/show features using style property

[Diego M.]

I am trying to filter vector layer features according to their attributes.
I have 4 check boxes: type_1, type_2, shape_1 and shape_2
Note that I am using Extjs for interface.

at beginning I could filter type attribute setting style to 'none' or '' ...
like so :

switch (f) {
case 'type_1':
if(checked)
filter('show_type_1');
else filter ('hide_type_1);

case 'type_2':
if(checked)
filter('show_type_2');
else filter ('hide_type_2);

}

function filter(value)
{
 switch (value){
 
case 'hide_type_1':
for (i=0;i<=features.length;i++)
if(features[i].attributes.type == 'first')
features[i].style = 'none'; 
layer.redraw();

case 'show_type_1':
for (i=0;i<=features.length;i++)
if(features[i].attributes.type == 'first')
features[i].style = ''; 
layer.redraw();

case 'hide_type_2':
for (i=0;i<=features.length;i++)
if(features[i].attributes.type == 'second')
features[i].style = 'none'; 
layer.redraw();

case 'show_type_2':
for (i=0;i<=features.length;i++)
if(features[i].attributes.type == 'second')
features[i].style = ''; 
layer.redraw();

}
}


all above works great, if I uncheck type_1, all type_1 features will
diappear.
then if I uncheck type_2, all type_2 features will diappear.
then if I check type_1 again, all type_1 features will appear, and type_2
features will stay hidden.

The problem is when I tried to do the same with shape attribute, by adding:

case 'shape_1':
if(checked)
filter('show_shape_1');
else filter ('hide_shape_1);

to the first function.

and:

case 'hide_shape_1':
for (i=0;i<=features.length;i++)
if(features[i].attributes.shape == 'first')
features[i].style = 'none'; 
layer.redraw();

case 'show_shape_1':
for (i=0;i<=features.length;i++)
if(features[i].attributes.shape == 'first')
features[i].style = ''; 
layer.redraw();

to the second one.


it works when I uncheck the shape_1 checkbox. all shape_1 features hid. but
if check it to display them, all features will be displayed even type_1 and
type_2  which I was keeping them unchecked and hidden!

I don't understand why that happens. because it works fine if I handle one
attribute (type in my case) but failed when tried to combine type filtering
with another feature attribute (shape).


I hope my explanation is clear.




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