Thank you. On Sun, Mar 3, 2013 at 2:34 PM, Romain Guy <[email protected]> wrote:
> All you have to do is call measure() on the children yourself. Or you > could just use layout params :) > On Mar 3, 2013 12:04 PM, "Michael Dunn" <[email protected]> wrote: > >> Thanks Mr. Guy. What would be the minimum required to use a value >> instead of LayoutParams (on the entire tree)? I don't believe this works: >> >> @Override >> protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { >> setMeasuredDimension(mWidth, mHeight); >> } >> >> >> On Sun, Mar 3, 2013 at 11:52 AM, Romain Guy <[email protected]>wrote: >> >>> You call measureChildren() which in turns call measureChild() which >>> looks at the LayoutParams of each child. >>> On Mar 1, 2013 10:12 PM, "momo" <[email protected]> wrote: >>> >>>> I have a custom ViewGroup that's only ever managing the size and >>>> position of one child. I've override onMeasure and onLayout so that >>>> LayoutParams are never examined, yet it fails unless I do provide >>>> LayoutParams. Here are abbreviated summaries of the relevant portions of >>>> the class: >>>> >>>> >>>> public class SomeSpecialLayoutManager extends ViewGroup { >>>> >>>> @Override >>>> protected void onMeasure(int widthMeasureSpec, int >>>> heightMeasureSpec) { >>>> measureChildren(widthMeasureSpec, heightMeasureSpec); >>>> int w = mChild.getMeasuredWidth(); >>>> int h = mChild.getMeasuredHeight(); >>>> w = Math.max(w, getSuggestedMinimumWidth()); >>>> h = Math.max(h, getSuggestedMinimumHeight()); >>>> w = resolveSize(w, widthMeasureSpec); >>>> h = resolveSize(h, heightMeasureSpec); >>>> setMeasuredDimension(w, h); >>>> } >>>> >>>> @Override >>>> protected void onLayout(boolean changed, int l, int t, int r, int >>>> b) { >>>> mChild.layout( 0, 0, mWidth, mHeight ); >>>> } >>>> } >>>> >>>> >>>> Using the above, the following *does* work: >>>> >>>> LayoutParams lp = mChild.getLayoutParams(); >>>> lp.width = mWidth; >>>> lp.height = mHeight; >>>> mChild.setLayoutParams( lp ); >>>> >>>> But since neither `onMeasure` nor `onLayout` even makes reference to >>>> `LayoutParams`, I wonder why it's required, or even how it's referenced at >>>> all. I would assume that since the layout pass grabs `mWidth` and >>>> `mHeight` directly, there'd be no need for the `LayoutParams` at all - and >>>> that a call to requestLayout would update it appropriately. >>>> >>>> However, when I isolate the above in a small program outside of a >>>> complicated View tree with scrolling layers that exceed "normal" container >>>> sizes, it *does* work as expected, so I have to assume the issue is in the >>>> measure pass. >>>> >>>> I've read as much documentation as I can find about what's going on >>>> during the measure and layout passes, and examined the source, but I >>>> believe I must be missing something. >>>> >>>> TYIA. >>>> >>>> -- >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Android Developers" group. >>>> To post to this group, send email to >>>> [email protected] >>>> To unsubscribe from this group, send email to >>>> [email protected] >>>> For more options, visit this group at >>>> http://groups.google.com/group/android-developers?hl=en >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "Android Developers" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>>> >>>> >>> -- >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Android Developers" group. >>> To post to this group, send email to [email protected] >>> To unsubscribe from this group, send email to >>> [email protected] >>> For more options, visit this group at >>> http://groups.google.com/group/android-developers?hl=en >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "Android Developers" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/android-developers/Wos0Zu0IdFM/unsubscribe?hl=en >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >>> >>> >> >> -- >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to >> [email protected] >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Android Developers" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > -- > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > --- > You received this message because you are subscribed to a topic in the > Google Groups "Android Developers" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/android-developers/Wos0Zu0IdFM/unsubscribe?hl=en > . > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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