On 2015-02-27 22:12-0000 Phil Rosenberg wrote:
Hi Alan
Yes I believe this is doable in wxWidgets. I'm sure I remember
coding it up when I added newline support so I think the code is
already in the driver if you look. I guess I never realised this
needed plumbing into the core code.
Should be a very easy fix if you know how to feed the sizes back in.
I have put in that necessary plumbing (see attached patch) but it
isn't working correctly (produces strange looking results for example
26).
Note, for git format-patch I used the --ignore-all-space option so
that the patch does not reflect the local styling changes I made, but
does give the essence of most of the changes you should need to get
the example 26 legend size to be correct.
I hope some minor correction is all that is needed to make this patch
work, but I cannot figure out what that correction is (probably
because I am not that familiar with the wxwidgets device code) so I
hope you can figure out that correction instead.
Alan
__________________________
Alan W. Irwin
Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).
Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________
Linux-powered Science
__________________________
From ff7f505975d6c0137d81d2aefe7f1b76b17e37b8 Mon Sep 17 00:00:00 2001
From: "Alan W. Irwin" <air...@users.sourceforge.net>
Date: Fri, 27 Feb 2015 15:59:51 -0800
Subject: [PATCH] wxwidgets device: install plumbing for
has/get_string_length.
This should be almost there, but produces incorrect rendering results for
example 26 so obviously needs more work from someone who knows
more about the wxwidgets device driver than I do.
---
drivers/wxwidgets_dev.cpp | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/wxwidgets_dev.cpp b/drivers/wxwidgets_dev.cpp
index b850f4e..45febac 100644
--- a/drivers/wxwidgets_dev.cpp
+++ b/drivers/wxwidgets_dev.cpp
@@ -194,6 +194,7 @@ wxPLDevice::wxPLDevice( PLStream *pls, char * mfo, PLINT text, PLINT hrshsym )
{
pls->dev_text = 1; // want to draw text
pls->dev_unicode = 1; // want unicode
+ pls->has_string_length = 1; // Driver supports string length calculations
if ( hrshsym )
pls->dev_hrshsym = 1;
}
@@ -769,7 +770,8 @@ void wxPLDevice::ProcessString( PLStream* pls, EscText* args )
bool lineFeed = false;
bool carriageReturn = false;
wxCoord paraHeight = 0;
- // Get the curent font
+ wxCoord max_textWidth = 0;
+ // Get the current font
m_fontScale = 1.0;
m_yOffset = 0.0;
plgfci( &m_fci );
@@ -799,6 +801,12 @@ void wxPLDevice::ProcessString( PLStream* pls, EscText* args )
m_posY = args->y / m_yScale;
DrawText( lineStart, lineLen, false );
+ if ( pls->get_string_length )
+ {
+ max_textWidth = m_textWidth > max_textWidth ? m_textWidth : max_textWidth;
+ }
+ else
+ {
if ( lineFeed && m_superscriptHeight > m_textHeight )
paraHeight += m_superscriptHeight - m_textHeight;
@@ -862,13 +870,18 @@ void wxPLDevice::ProcessString( PLStream* pls, EscText* args )
m_posY = (PLINT) ( args->y / m_yScale - ( args->just * m_textWidth ) * sin_rot + ( 0.5 * m_textHeight - paraHeight * m_lineSpacing ) * cos_rot );
DrawText( lineStart, lineLen, true );
}
-
+ }
lineStart += lineLen;
if ( carriageReturn )
lineStart++;
lineLen = 0;
}
+
+ if ( pls->get_string_length )
+ {
+ pls->string_length = (PLFLT) max_textWidth * 25.4 / 72.0;
+ }
}
//--------------------------------------------------------------------------
--
1.7.10.4
------------------------------------------------------------------------------
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