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Factor out text measurement from wxDC and wxWindow into wxTextMeasure.

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Add a new private wxTextMeasure class implementing methods for measuring text
and move the often duplicated (but not always identically) code for doing the
same from wxDC and wxWindow into it.

Currently this class is only really implemented in wxMSW and wxGTK.

Also extend the test for text measuring functions and rename it to
MeasuringTextTestCase from MeasuringContextTestCase as it's not wxGC-specific
any more.

Closes #14705.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72699 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2012-10-17 22:35:49 +00:00
parent 28dc9371d1
commit 8cd79b7af0
24 changed files with 1616 additions and 396 deletions
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53
src/gtk/window.cpp
View File

@@ -43,6 +43,7 @@
#include "wx/gtk/private/gtk2-compat.h"
#include "wx/gtk/private/event.h"
#include "wx/gtk/private/win_gtk.h"
#include "wx/private/textmeasure.h"
using namespace wxGTKImpl;
#ifdef GDK_WINDOWING_X11
@@ -3080,52 +3081,18 @@ void wxWindowGTK::DoGetTextExtent( const wxString& string,
int *externalLeading,
const wxFont *theFont ) const
{
wxFont fontToUse = theFont ? *theFont : GetFont();
// ensure we work with a valid font
wxFont fontToUse;
if ( !theFont || !theFont->IsOk() )
fontToUse = GetFont();
else
fontToUse = *theFont;
wxCHECK_RET( fontToUse.IsOk(), wxT("invalid font") );
if (string.empty())
{
if (x) (*x) = 0;
if (y) (*y) = 0;
return;
}
PangoContext *context = NULL;
if (m_widget)
context = gtk_widget_get_pango_context( m_widget );
if (!context)
{
if (x) (*x) = 0;
if (y) (*y) = 0;
return;
}
PangoFontDescription *desc = fontToUse.GetNativeFontInfo()->description;
PangoLayout *layout = pango_layout_new(context);
pango_layout_set_font_description(layout, desc);
{
const wxCharBuffer data = wxGTK_CONV( string );
if ( data )
pango_layout_set_text(layout, data, strlen(data));
}
PangoRectangle rect;
pango_layout_get_extents(layout, NULL, &rect);
if (x) (*x) = (wxCoord) PANGO_PIXELS(rect.width);
if (y) (*y) = (wxCoord) PANGO_PIXELS(rect.height);
if (descent)
{
PangoLayoutIter *iter = pango_layout_get_iter(layout);
int baseline = pango_layout_iter_get_baseline(iter);
pango_layout_iter_free(iter);
*descent = *y - PANGO_PIXELS(baseline);
}
if (externalLeading) (*externalLeading) = 0; // ??
g_object_unref (layout);
const wxWindow* win = static_cast<const wxWindow*>(this);
wxTextMeasure txm(win, &fontToUse);
txm.GetTextExtent(string, x, y, descent, externalLeading);
}
void wxWindowGTK::GTKDisableFocusOutEvent()