Hi again Romain and thanks for your quick responses,
Let me try to explain the setup further:
I have a rootView which contains a few ViewGroups. When an item is
dragged it is removed from the ViewGroup which it originally belonged
to and added to the rootView instead, the dragged item is then what is
called the mEditView in my code. When the dragged item is released it
is added to the ViewGroup which it is currently positioned over or if
not accepted there returned to it's original location and ViewGroup.
As long as the item is dragged around the rootView.getChildSta... is
responsible for drawing it in the right place, this is acheived with
the help class of mEditTransformationHelper which enables some simple
animation of the movements. By implementing this simple form of
private animation I can at any time locate where the View is drawn,
which I need to know when the dragged item is released.
The tricky part is when the view gets released, it then is removed
from the rootView and reinserted into one of the ViewGroups. My custom
animation is responsible for smoothly moving the dragged view from the
drop location to the actual location that it is assigned to (currently
using a grid layout so some adjustment will be made from the actual
drop location). The custom animation is given the absolute location of
the dragged view before it is removed from the rootView. Once the
animation is initiated it will recalculate the coordinates to
correspond with the new assigned location of the view, this works
really well with the exception following.
The problem is that if the dragged view is partially (or even fully)
over another ViewGroup than the one it will be assigned to after the
drop, that other ViewGroup is not invalidated and the part of the view
that was visible over the other ViewGroup will remain visible while
and after the animation is finished.
The question is therefor how I can ensure that either the entire
rootView is invalidated (during animation) or which other approach
that could be advised.
Below are the relevant code snippets from the key functions and
classes:
rootView.getChildStaticTransformation(View child, Transformation t) {
[...]
if(child == this.mEditView) {
Transformation tr=new Transformation();
tr.set(this.mEditTransformation);
[...]
//Update the tr transformation
this.mEditTransformationHelper.apply(tr);
this.invalidate();
[...]
t.compose(tr);
this.mEditTransformation.set(t);
returnValue=true;
}
[...]
}
customAnimation.applyTransformation(float interpolatedTime,
Transformation t) {
super.applyTransformation(interpolatedTime, t);
Misc.updateTransformation(t,this.mWork,interpolatedTime,true);
}
mEditTransactionHelper.apply(Transformation source)
{
[...]
for(...)
{
[...]
//Update the source transformation
Misc.updateTransformation(source,tr.mTargetTransformation,completed);
[...]
}
}
Misc.updateTransformation(Transformation source,Transformation
target,float progress,boolean reverse)
{
[...]
if(target.getTransformationType() == Transformation.TYPE_BOTH ||
target.getTransformationType() == Transformation.TYPE_MATRIX)
{
[...]
float [] sourceMatrix=new float[9];
source.getMatrix().getValues(sourceMatrix);
float[] targetMatrix=new float[9];
target.getMatrix().getValues(targetMatrix);
for(int i=0;i<9;i++)
{
sourceMatrix[i]=sourceMatrix[i]+(targetMatrix[i]-
sourceMatrix[i])*progress;
}
source.getMatrix().setValues(sourceMatrix);
[...]
}
}
On Sep 1, 9:50 pm, "Romain Guy" <[EMAIL PROTECTED]> wrote:
> Hi,
>
> It's hard to tell what's going on with such a succinct description.
> Could you show some code if possible? It looks like you are simply not
> invalidating the drop parent correctly.
>
> On Mon, Sep 1, 2008 at 10:37 AM, Erik Calissendorff
>
>
>
> <[EMAIL PROTECTED]> wrote:
>
> > I'm creating a custom animation which extends Animation and overrides
> > applyTransformation(float interpolatedTime, Transformation t)
>
> > I'm also overriding getChildStaticTransformation(View child,
> > Transformation t) in a rootView which I use for drag'n'drop.
>
> > When I move a view outside of the drop parent before I initiate my
> > custom animation the original position of the view is not cleared. If
> > I modify my custom Animation so it doesn't modify the Transformation
> > the original location is cleared as expected.
>
> > So my question, how should I implement my custom animation so it will
> > invalidate the area correctly?
>
> --
> Romain Guywww.curious-creature.org
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