Icon-O-Matic: Fix window resizing bug

Previously, the window could not go any smaller than the current size
after some changes were made to the icon such as adding a style.

Fixes #4711

Also cleans up some code style.

Change-Id: I4e7af98ac8afbea28a46d81b9de7aba6fc6c894a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6836
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Reviewed-by: humdinger humdinger <humdinger@mailbox.org>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

Fixed warning about hiding BView::Perform().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37733 a95241bf-73f2-0310-859d-f6bbb57e9c96

culmulative update...
* holding down space, or using the third mouse button, will force
the "pan canvas" mode
* using the mouse wheel zooms in and out
* fixed issues with the undo commands when nudging something with
the cursor keys
* manipulators can now indicate wether they changed the mouse cursor
* ChangePointCommand is no longer inserted if the point didn't change
* new "flip" points feature in context menu, flips "in" and "out" curve
control points
* mouse wheel events are now propagated together with the mouse position
* new "UndoesPrevious" method in Command interface (used to clean up
command stack)
* clean ups in CommandStack



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20623 a95241bf-73f2-0310-859d-f6bbb57e9c96

* started work on saving program settins, window frame is
remembered for now
* fixed some annoying bugs:
- the snapping prevented some of the proximity checks from
working while editing a path or using the transform box,
now the Manipulators themself are responsible for mouse
snapping and can do so at the time it works best for them
- pressing the Esc key while using the transform box did
reset the transformation, but didn't exit the transform
mode (return to path editing)
* improved layout of some views when the window is resized



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19266 a95241bf-73f2-0310-859d-f6bbb57e9c96

the first steps towards Icon-O-Matic
* added a framework with many classes that I think will be useful
* currently, the StateView and Manipulator interface are used to
allow editing a single VectorPath object, nothing more... the
CommandStack framework is also used to support Undo/Redo


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17822 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixed warning about hiding BView::Perform().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37733 a95241bf-73f2-0310-859d-f6bbb57e9c96

culmulative update...
* holding down space, or using the third mouse button, will force
the "pan canvas" mode
* using the mouse wheel zooms in and out
* fixed issues with the undo commands when nudging something with
the cursor keys
* manipulators can now indicate wether they changed the mouse cursor
* ChangePointCommand is no longer inserted if the point didn't change
* new "flip" points feature in context menu, flips "in" and "out" curve
control points
* mouse wheel events are now propagated together with the mouse position
* new "UndoesPrevious" method in Command interface (used to clean up
command stack)
* clean ups in CommandStack



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20623 a95241bf-73f2-0310-859d-f6bbb57e9c96

* started work on saving program settins, window frame is
remembered for now
* fixed some annoying bugs:
- the snapping prevented some of the proximity checks from
working while editing a path or using the transform box,
now the Manipulators themself are responsible for mouse
snapping and can do so at the time it works best for them
- pressing the Esc key while using the transform box did
reset the transformation, but didn't exit the transform
mode (return to path editing)
* improved layout of some views when the window is resized



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19266 a95241bf-73f2-0310-859d-f6bbb57e9c96

the first steps towards Icon-O-Matic
* added a framework with many classes that I think will be useful
* currently, the StateView and Manipulator interface are used to
allow editing a single VectorPath object, nothing more... the
CommandStack framework is also used to support Undo/Redo


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17822 a95241bf-73f2-0310-859d-f6bbb57e9c96