Источник:
http://palleagermark.blogspot.com/20...l-classes.html
==============
The idea with the ImageListAppl classes is that you load and cache a list of images once in for example a form. For each record where you want to show an image, through a display method you just lookup the image in the cached list.
However I often see code where the image list is loaded in the display method itself, putting some overhead on the display method.
Steps to use an ImageListClass
First of all, create a form window control to hold the images. These would be appropriate properties if you place this control in a grid:
PropertyValueAutoDeclarationYesAllowEditNoWidth14Height14EnabledNoSkipYesAlignControlNoImageModeSize to fitShowLabelNoDataSourceYour controlling datasourceDataMethodYour method to select the right image
In the ClassDeclaration of the form declared your ImageListAppl class:
ImageListAppl_MyImageList imageListAppl;
In the init method of the form, initialize your ImageListAppl object:
imageListAppl = new ImageListAppl_MyImageList();
And still in the init method pass the list of images to your window control:
myWindowControl.imageList(imageListAppl.imageList());
Implement your display method driving which image to show:
//BP Deviation Documented
display ImageRes myDisplayMethod(MyRecord _myRecord)
{
ImageRes res = -1;
#resAppl;
if (_myRecord.someConditioin())
{
res = imageListAppl.image(#MyImage);
}
return res;
}
That's it...
Источник:
http://palleagermark.blogspot.com/20...l-classes.html