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[Draw2D] change icon of Label depending on Zoom [message #754737]

Fri, 04 November 2011 06:27

Ludwig Moser

Messages: 476
Registered: July 2009

Senior Member

Hello,

i wonder if it makes sense to change the image used by labels depending on zoom level.
i ask this as i have pretty large images in use:

1x ~5500x4000px
100-1000 of 128x128px

so when you zoom out i would use low res images of 64x64, 32x32 otherwise the high res 128x128

how can i achieve this, without a lot of struggle?
note: i already looked at the zoom example and noticed that icons get blocky if you zoom in a lot, while text keeps sharp

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Re: [Draw2D] change icon of Label depending on Zoom [message #755567 is a reply to message #754737]

Tue, 08 November 2011 19:55

Alexander Nyssen

Messages: 244
Registered: July 2009
Location: Lünen

Senior Member

Well, I haven't tried yet, but I suppose the easiest approach would be to query the ZoomManager (obtainable from ScalabeRootEditPart) for the current zoom level from within your GraphicalEditPart#refreshVisuals() implementation and to update your label base on this.

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Re: [Draw2D] change icon of Label depending on Zoom [message #755646 is a reply to message #755567]

Wed, 09 November 2011 08:26

Ludwig Moser

Messages: 476
Registered: July 2009

Senior Member

Alexander y wrote on Tue, 08 November 2011 14:55

Well, I haven't tried yet, but I suppose the easiest approach would be to query the ZoomManager (obtainable from ScalabeRootEditPart) for the current zoom level from within your GraphicalEditPart#refreshVisuals() implementation and to update your label base on this.

i'm confused now.
i implemented the zoom stuff with a SWT scroll component
i further have a LWS, the IFigure=content and a ZoomContainer

for me the zoom level is easily available, so thats no problem
but where do i get that graphicaleditpart?

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