| T O P I C R E V I E W |
| Elemental |
Posted - Nov 25 2020 : 16:20:53
I have noticed the following odd behavior with ImageEn for Delphi, version 7.2.6:
Load an image into ImageEnView1 with LoadFromFile which is bigger than 2 x 2
ImageEnView1.IsEmpty returns False
Call ImageEnView1.LayersAdd()
ImageEnView1.IsEmpty now returns True.
The image is clearly not empty nor too small. I believe the problem is that IsEmpty relies on fIEBitmapValid, and that flag is being re-set to False in SetLayersCurrentEx because the new layer (a shape) is not a valid bitmap. I have attached a small sample project which was made in Delphi XE7, but the bug is still manifest in Sydney.
"Roj"
attach/Elemental/2020112516207_ImageEnIsEmpty.zip
57.83 KB |
| 3 L A T E S T R E P L I E S (Newest First) |
| Elemental |
Posted - Nov 30 2020 : 13:32:27
Thank you for your response. Since the tool in question should only be active when an image is actually loaded, I set a private boolean to the result of LoadFromFile, and then check that boolean in the OnUpdate method of the action. After all, I didn't want an OnUpdate method to change the active layer, and there is always a layer 0 so I couldn't check against that. Thanks, Nigel. |
| xequte |
Posted - Nov 27 2020 : 13:34:52
Hi Roj
That is correct. IsEmpty returns the status of the active layer.
https://www.imageen.com/help/TImageEnView.IsEmpty.html
When you can LayersAdd() the new layer will be empty, so the result is true.
Nigel
Xequte Software
www.imageen.com
|
| Elemental |
Posted - Nov 25 2020 : 16:24:44
I'm sorry. It's version 9.2.6, not 7.2.6. |
|
|
Search
