Loading Image in DocumentGalleryModel takes extremely long tine

[wladek]

Hi wysota,

I definitely do not want to use them in such a big resolution.
So I should use the QML Item's scale property?

Something like:

Image {
id: imageDelegate
asynchronous: true
source: url
smooth: true
width: 110
height: 110
fillMode: Image.PreserveAspectFit
sourceSize.width: 110
sourceSize.height: 110
scale: 0.3 //for example?

Image {
id: imageDelegate
asynchronous: true
source: url
smooth: true
width: 110
height: 110
fillMode: Image.PreserveAspectFit
sourceSize.width: 110
sourceSize.height: 110
scale: 0.3 //for example?

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Wladek.

[wysota]

You can certainly try that but in general I would scale them down before going into QML layer.

[wladek]

And how should I try to achieve such a think?

[wysota]

You can use Qt/C++ and then expose the images to QML.

[wladek]

So you think I should implement my own model?
But in that way I could not benefit from all the advantages the DocumentGalleryModel has to offer, would I?

Thanks,
Wladek

[wysota]

So you think I should implement my own model?

I think you should use smaller images. The way you do it is a secondary issue. If an image is big and you want to fit it into a small screen it has to be scaled down and this takes time. You can't eat a cake and have the cake.

[wladek]

So what do you suggest in order to get the images smaller?

Wladek

[wysota]

Scale them down before you display them and store the thumbnails for future use. You can run a native function after you fetch the image from the model and before you display it. You can run the function in a worker thread to avoid freezing the UI.