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Re: Native DPI [message #44696 is a reply to message #44693]

Wed, 27 May 2015 10:14

mirek is currently offline

mirek
Messages: 13984
Registered: November 2005

Ultimate Member

Tom1 wrote on Tue, 26 May 2015 10:22

Hi,

Not having GetDPIForMonitor() does not seem to be a catastropy. I tried a few things on Windows 8.1 with two displays (UHD as primary and FullHD as secondary):

It seems we can always query "Windows main display's" DPI using GetDeviceCaps(handle,LOGPIXELSX) and GetDeviceCaps(handle,LOGPIXELSY).

Is default font size being changed as well?

(I sort of doubt it, this is our current code for reading font height

NONCLIENTMETRICS ncm;
ncm.cbSize = sizeof(ncm);
::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(ncm), &ncm, 0);
name = FromSystemCharset(ncm.lfMenuFont.lfFaceName);
height = abs((int)ncm.lfMenuFont.lfHeight);

- there does not seem anything that would link it with any monitor)

Quote:

If the window is moved to another display, a WM_DPICHANGED message is received with wParam LOWORD and HIWORD reporting the new DPI values of the monitor, the window was moved to.

If the initial display DPI is read at window creation time with GetDeviceCaps() and always updated when a WM_DPICHANGED message is received, I think we have it all covered.

Well, as long as we maintain single DPI for the whole application...

Mirek

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[Message index]

		Native DPI By: Tom1 on Thu, 21 May 2015 11:45
		Re: Native DPI By: mirek on Sat, 23 May 2015 20:23
		Re: Native DPI By: Tom1 on Sun, 24 May 2015 10:29
		Re: Native DPI By: mirek on Sun, 24 May 2015 21:16
		Re: Native DPI By: Tom1 on Mon, 25 May 2015 10:05
		Re: Native DPI By: Tom1 on Mon, 25 May 2015 16:54
		Re: Native DPI By: mirek on Mon, 25 May 2015 23:13
		Re: Native DPI By: chickenk on Tue, 26 May 2015 07:35
		Re: Native DPI By: Tom1 on Tue, 26 May 2015 10:22
		Re: Native DPI By: mirek on Wed, 27 May 2015 10:03
		Re: Native DPI By: mirek on Wed, 27 May 2015 10:14
		Re: Native DPI By: Tom1 on Wed, 27 May 2015 13:32
		Re: Native DPI By: mirek on Wed, 27 May 2015 14:13
		Re: Native DPI By: Tom1 on Thu, 28 May 2015 09:47
		Re: Native DPI By: mirek on Fri, 29 May 2015 10:16
		Re: Native DPI By: mirek on Fri, 29 May 2015 13:27
		Re: Native DPI By: Tom1 on Fri, 29 May 2015 17:23
		Re: Native DPI By: mirek on Sat, 06 June 2015 07:37
		Re: Native DPI By: Tom1 on Mon, 08 June 2015 10:31
		Re: Native DPI By: mirek on Sat, 13 June 2015 17:04
		Re: Native DPI By: Tom1 on Mon, 15 June 2015 00:00
		Re: Native DPI By: mirek on Mon, 15 June 2015 14:01
		Re: Native DPI By: Tom1 on Tue, 16 June 2015 22:13
		Re: Native DPI By: mirek on Tue, 16 June 2015 23:37
		Re: Native DPI By: Tom1 on Wed, 17 June 2015 10:02
		Re: Native DPI By: mirek on Fri, 19 June 2015 08:26
		Re: Native DPI By: Tom1 on Mon, 22 June 2015 11:52
		Re: Native DPI By: Tom1 on Fri, 26 June 2015 09:13
		Re: Native DPI By: mirek on Mon, 03 August 2015 20:11
		Re: Native DPI By: Tom1 on Wed, 05 August 2015 13:03
		Re: Native DPI By: mirek on Wed, 05 August 2015 14:56
		Re: Native DPI By: Tom1 on Wed, 05 August 2015 15:50
		Re: Native DPI By: mirek on Sun, 09 August 2015 13:22
		Re: Native DPI By: Tom1 on Mon, 10 August 2015 11:12
		Re: Native DPI By: Tom1 on Thu, 13 August 2015 12:22
		Re: Native DPI By: mirek on Tue, 18 August 2015 20:10
		Re: Native DPI By: Tom1 on Wed, 19 August 2015 13:07
		Re: Native DPI By: mirek on Wed, 19 August 2015 22:35
		Re: Native DPI By: Tom1 on Sat, 22 August 2015 09:56
		Re: Native DPI By: mirek on Sun, 23 August 2015 12:23
		Re: Native DPI By: Tom1 on Sat, 29 August 2015 13:54
		Re: Native DPI By: mirek on Sat, 29 August 2015 18:26
		Re: Native DPI By: Tom1 on Mon, 31 August 2015 10:24
		Re: Native DPI By: Tom1 on Mon, 31 August 2015 14:38
		Re: Native DPI By: mirek on Wed, 02 September 2015 16:11
		Re: Native DPI By: Tom1 on Thu, 03 September 2015 09:07
		Re: Native DPI By: mirek on Fri, 04 September 2015 08:51
		Re: Native DPI By: Tom1 on Fri, 04 September 2015 10:10
		Re: Native DPI By: mirek on Sun, 06 September 2015 07:35
		Re: Native DPI By: Tom1 on Mon, 07 September 2015 10:55
		Re: Native DPI By: mirek on Sun, 04 October 2015 08:07

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