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Original message

Author Bob Tarling <bob.tarling@ntlworld.com>
Full name Bob Tarling <bob.tarling@ntlworld.com>
Date 2004-07-05 12:49:40 PDT
Message Many thanks.

I've added your patch to IZ at
http://gef.tigris.or​g/issues/show_bug.cg​i?id=144
If you add yourself to the cc list you will get progress reports as this
issue is updated.

Regards

Bob.
----- Original Message -----
From: rogerio
To: dev at gef dot tigris dot org
Sent: Monday, July 05, 2004 3:59 PM
Subject: [gef-dev] Zoom patch and new layers


I have made some modifications in the layers.
I have created three new layers:
- LayerBackground: draws the background, can be extended to draw a
background image.
- LayerSelection: draw the selection behavior
- LayerLexical: draw the modes behavior.

This layers are defined in Editor as follows:

|-----------------| |-----------| |-----------------| |-----------------|
|-----------------| |--------------|
| LayerBackground |--| LayerGrid |--| LayerPageBreaks |-| LayerDiagram
|-| LayerSelection |-| LayerLexical |
|-----------------| |-----------| |-----------------| |-----------------|
|-----------------| |--------------|

This made possible to simplify the method paint of the Editor transferring
more reponsabilidades to the Layers.
Moreover I modified LayerGrid and LayerPageBreaks so that the width of
the grid lines and the page break lines are not scaled together with
objects.

The scaling of the figures now happens in the layers depending on the
function of the layer.

These alterations had become zooming faster also in a diagram with many
figures.

This approach to is based to that described in paper: "Using the Multi-Layer
Model for
Building Interactive Graphical Applications" Fekete, et al, on which gef is
based.


I hope to have contributed.

Rogério Sorroche.







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