I have a custom ViewGroup. The idea is to be able to place controls
at absolute positions and then have the ViewGroup scale those controls
based on the difference in the screen dimensions with respect to the
original design dimensions. I am using the code below. In response
to the 'onMeasure' message, I am storing the width and height of the
view. Then on the 'onLayout' message I am computing new dimensions
for the child controls and adjusting their sizes proportionally. This
all works to some degree. However for certain controls (e.g. button
controls), the control resizes, but the text inside does not remain
centered within the control. I am thinking that there is some other
call I need to make to update the child controls after I change their
size.
Any suggestions?
Thanks
@Override
protected void onMeasure(int wid, int hgt)
{
super.onMeasure(wid, hgt);
m_viewWidth = getMeasuredWidth();
m_viewHeight = getMeasuredHeight();
measureChildren(wid, hgt);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b)
{
int count = getChildCount();
for (int i = 0; i < count; i++)
{
View child = getChildAt(i);
if (child.getVisibility() != GONE)
{
GViewGroup.LayoutParams lp = (GViewGroup.LayoutParams)
child.getLayoutParams();
int wid = child.getMeasuredWidth();
int hgt = child.getMeasuredHeight();
int lx = lp.x;
int ly = lp.y;
int ux = lp.x + wid;
int uy = lp.y + hgt;
if ((m_designWidth != 0) && (m_designHeight != 0) &&
(m_viewWidth != 0) && (m_viewHeight != 0))
{
lx = (lx * m_viewWidth) / m_designWidth;
ux = (ux * m_viewWidth) / m_designWidth;
ly = (ly * m_viewHeight) / m_designHeight;
uy = (uy * m_viewHeight) / m_designHeight;
}
child.layout(lx, ly, ux, uy);
}
}
}
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