There are some useful new calls in the latest build, that are not fully
documented yet. They let you check what the devices DPI setting is properly.
SYSINFO(number)
SYSINFO returns information about the device. This is not a complete
list of return values: see Microsoft's documentation on GetSystemMetrics
and GetDeviceCaps for more.
SM_CXSCREEN 0 Width of screen
SM_CYSCREEN 1 Height of screen
SM_CXVSCROLL2 Width of arrow bitmap on vertical scroll bar
SM_CYHSCROLL3 Height of arrow bitmap on horizontal scroll bar
SM_CYCAPTION4 Height of caption or title
SM_CXDLGFRAME 7 Width of dialog frame window
SM_CYDLGFRAME 8 Height of dialog frame window
SM_CYMENU 15 Height of menu
SM_CXFULLSCREEN 16 Width of window client area
SM_CYFULLSCREEN 17 Height of window client area
SM_CYVSCROLL20 Height of arrow bitmap on horizontal scroll bar
SM_CXVSCROLL21 Height of arrow bitmap on vertical scroll bar
HORZREZ 108 HiRes Display width pixels
VERTREZ 109 HiRes Display height pixels
BITSPIXEL 112 Bits per pixel
NUMCOLORS 124 Number of colors
LOGPIXELSX 188 Pixels per inch horizontal
LOGPIXELSY 190 Pixels per inch vertical
Example
REM SYSINFO Example
MSGBOX The device's DPI is sysInfo(188)
Output
The device's DPI is 96.
I've noticed that while some controls return dimensional properties in
Twips and most expect such properties in Pixels there is a need to
determine the TwipsPerPixel value - which can vary. However I haven't
found a clean way to get this value from API calls since Output.hDC
doesn't exist and nothing seems to be built into NS Basic/CE (or I've
missed it).
According to http://windowsteamblog.com/blogs/windowsphone/archive/
2009/09/02/widget-anatomy-the-keys-for-a-great-user-experience.aspx a
rough aproximation can be achieved by dividing the world into 96 DPI and
192 DPI devices.
This would let me do something like:
If Output.Width = 480 Then
TwipsPerPixel = 7.5
Else
TwipsPerPixel = 15
End If
Is this more or less what people are doing? Is there an alternative?
Have I missed some general guidelines on Hi DPI device support someplace?
Yahoo! Groups Links
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