~ubuntu-branches/ubuntu/intrepid/plplot/intrepid

The wxWidgets driver is already capable of redirecting the plot to any canvas (wxDC), which can also be provided by a wxApp. The API is not quite ready for release, but it's easy to implement. First we need to inherit a class from plstream

#include "plplotP.h"

#include "plstream.h"

#include "wx/dc.h"

class wxPLplotstream : public plstream

{

public:

wxPLplotstream( wxDC *dc, int width, int height ); //!< Constructor.

void set_stream(); //!< Calls some code before every PLplot command.

void SetSize( int width, int height ); //!< Set new size of plot area.

void RenewPlot(); //!< Redo plot.

private:

wxDC* m_dc; //!< Pointer to wxDC to plot into.

int m_width; //!< Width of dc/plot area.

int m_height; //!< Height of dc/plot area.

};

wxPLplotstream::wxPLplotstream( wxDC *dc, int width, int height ) :

m_dc(dc), m_width(width), m_height(height)

{

::plstream();

sdev( "wxwidgets" );

spage( 0.0, 0.0, m_width, m_height, 0, 0 );

SetOpt( "text", "1" ); // use freetype?

SetOpt( "smooth", "1" ); // antialiased text?

init();

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plP_esc( PLESC_DEVINIT, (void*)m_dc );

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}

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void wxPLplotstream::set_stream()

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{

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plstream::set_stream();

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}

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void wxPLplotstream::SetSize( int width, int height )

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{

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m_width=width;

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m_height=height;

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plP_esc( PLESC_CLEAR, NULL );

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wxSize size( m_width, m_height );

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plP_esc( PLESC_RESIZE, (void*)&size );

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}

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void wxPLplotstream::RenewPlot()

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{

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plP_esc( PLESC_CLEAR, NULL );

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replot();

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}

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In the wxWidgets application a wxMemoryDC must be created (e.g. in the constructor of a wxWindow) and made known to the driver, e.g.

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MemPlotDC = new wxMemoryDC;

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MemPlotDCBitmap = new wxBitmap( 640, 400, -1 );

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MemPlotDC->SelectObject( *MemPlotDCBitmap );

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my_stream = new wxPLplotstream( (wxDC*)MemPlotDC, MemPlotDC_width, MemPlotDC_height );

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The OnPaint() event handler looks like this (double buffering is used here)

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void plotwindow::OnPaint( wxPaintEvent &WXUNUSED(event) )

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{

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int width, height;

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GetSize( &width, &height );

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// Check if we window was resized (or dc is invalid)

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if( (my_stream == NULL) || (MemPlotDC_width!=width) || (MemPlotDC_height!=height) ) {

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MemPlotDC->SelectObject( wxNullBitmap );

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if( MemPlotDCBitmap )

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delete MemPlotDCBitmap;

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MemPlotDCBitmap = new wxBitmap( width, height, -1 );

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MemPlotDC->SelectObject( *MemPlotDCBitmap );

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my_stream->SetSize( width, height );

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my_stream->replot();

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MemPlotDC_width = width;

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MemPlotDC_height = height;

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}

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wxPaintDC dc( this );

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dc.SetClippingRegion( GetUpdateRegion() );

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dc.BeginDrawing();

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dc.Blit( 0, 0, width, height, MemPlotDC, 0, 0 );

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dc.EndDrawing();

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}

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The whole PLplot API is then available via the my_stream object.

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--------- don't bother with stuff below this line -----------------------------------------

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Installation instructions for Win32

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- install wxWidgets 2.6.1 (see instructions below)

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- NOT WORKING NOW: install gd library and/or freetype library (see instructions below)

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- download the PLplot library from plplot.sf.net (version 5.5.3)

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- Remark (Mac OS X): You need automake 1.8.2 and libtool 1.4 in order to compile PLplot.

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Download and install fink (fink.sf.net) and install these programs.

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- untar or unzip it in a suitable directory

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- unzip or untar the wxPLplot package in sys/win32

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- cd into sys/win32/wxplplot

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- WIN32:

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. Set WXWIN environment variable (see wxWidgets instructions).

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. For all compilers you need the mingw32-make program (www.mingw.org).

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. Check the settings in config.mak.

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. Run: mingw32-make COMPILER=bcc

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. or: mingw32-make COMPILER=gcc

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. Run: cd examples

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. Run: mingw32-make COMPILER=bcc

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. or: mingw32-make COMPILER=gcc

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Install the gd library for png, gif and jpeg drivers (Win32, NOT WORKING NOW)

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- goto http://www.boutell.com/gd/ and download the precompiled Windows DLL at

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the bottom ( http://www.boutell.com/gd/http/gdwin32.zip )

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- extract to sys/win32/wxplplot

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- enter sys/win32/wxplplot/gdwin32 and make a library from the dll

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Borland BCC 5.5: implib -a bgd_bcc.lib bgd.dll

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VC++: lib /machine:i386 /def:bgd.def

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MingW: already in gdwin32 (libbgd.a)

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Install the freetype library (Win32, NOT WORKING NOW)

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Install wxWidgets 2.6.1

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+ Win32 MingW Compiler

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- Download the necessary files from www.mingw.org. Either the whole package mingw-3.1.0 or

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the canditate releases from at least gcc-core, gcc-g++, binutils, mingw-runtime, w32api,

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mingw-utils, mingw32-make and gdb. Install them in a directory and set the path file accordingly.

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- Download wxWidgets 2.6.1 from http://www.wxwidgets.org (wxMSW package).

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- Unzip it to a folder and set the WXWIN variable accordingly (system wide in System Settings/System).

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- Goto %WXWIN%/build/msw.

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- Run all or some of the following commands:

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mingw32-make -f makefile.gcc BUILD=debug MONOLITHIC=1 SHARED=1

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The wxWidgets (debug, shared) library will be build.

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mingw32-make -f makefile.gcc BUILD=release MONOLITHIC=1 SHARED=1

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The wxWidgets (release, shared) library will be build.

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mingw32-make -f makefile.gcc BUILD=debug MONOLITHIC=1 SHARED=0

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The wxWidgets (debug, static) library will be build.

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mingw32-make -f makefile.gcc BUILD=release MONOLITHIC=1 SHARED=0.

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The wxWidgets (release, static) library will be build.

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- Copy both dlls from %%WXWIN%/lib/gcc_dll to a directory, where they can be found (e.g. sys/win32/wxplplot/examples directory).

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- The same WXWIN variable must than be set for the wxplplot makefile.

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+ Win32 Borland free command line tools (BCC 5.5.2)

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- Install the Borland Compiler.

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- Download wxWidgets 2.6.1 from http://www.wxwidgets.org (wxMSW package)

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- Unzip it to a folder and set the WXWIN variable accordingly (system wide in System Settings/System).

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- Goto %WXWIN%/build/msw.

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- Run all or some of the following commands:

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make -f makefile.bcc -DBUILD=debug -DMONOLITHIC=1 -DSHARED=1

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The wxWidgets (debug, shared) library will be build.

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make -f makefile.bcc -DBUILD=release -DMONOLITHIC=1 -DSHARED=1

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The wxWidgets (release, shared) library will be build.

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make -f makefile.bcc -DBUILD=debug -DMONOLITHIC=1 -DSHARED=0

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The wxWidgets (debug, static) library will be build.

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make -f makefile.bcc -DBUILD=release -DMONOLITHIC=1 -DSHARED=0.

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The wxWidgets (release, static) library will be build.

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- Copy both dlls from %%WXWIN%/lib/gcc_dll to a directory, where they can be found (e.g. sys/win32/wxplplot/examples directory).

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- The same WXWIN variable must than be set for the wxplplot makefile.

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