Jim McGowen wrote:
Well after much toil I'm back where I started, only even more confused than
I was.
What I want to do is handle 5-way navigation key down events. I don't need
"one-handed navigaion" or focus rings ect... I simply want to handle
scrolling and selecting in a custom list control I made. I got this working
over a year ago with the Tungsten C but the new navigation features on newer
devices boke it.
What I've gathered from the documentation and from Ben is I need to put my
forms in "Interaction Mode". The docs tell me I can use FrmSetNavState() to
do this, but this function causes Sys 0505 errors (and later on in the doc
it actually say's don't use this with the T5).
You don't actually need to do that. If you don't, the system will just
send you regular pageUpChr and PageDownChr characters. You can just
treat those as equivalent to 5-way up and down presses. At least for
most purposes you can.
I use code that looks like this:
#include <palmOne_68K.h>
.
.
.
switch (eventPtr->eType)
{
case keyDownEvent:
if (EvtKeydownIsVirtual (eventPtr))
{
if (NavKeyPressed (eventPtr, Up)
|| eventPtr->data.keyDown.chr == pageUpChr)
{
Handle5wayUp();
return (true);
}
else if (NavKeyPressed (eventPtr, Down)
|| eventPtr->data.keyDown.chr == pageDownChr)
{
Handle5wayDown();
return (true);
}
else if (NavKeyPressed (eventPtr, Left))
{
Handle5wayLeft();
return (true);
}
else if (NavKeyPressed (eventPtr, Right))
{
Handle5wayRight();
return (true);
}
else if (NavKeyPressed (eventPtr, Select))
{
Handle5waySelect();
return (true);
}
}
return (false);
break;
}
Note that my "if" statements have extra conditions for up and down
that they do not have for left and right. Also note that this means
I don't distinguish between devices with and without 5-way. Devices
without 5-way are basically treated as if they have a 5-way but the
left, right, and center buttons are missing. I think there could be
some cases that this isn't flexible enough to handle, but it works
well enough for many purposes.
- Logan
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