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textbox: Handle tall glyphs better (#433)

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We now place text based on the baseline, instead of the top of the
tallest glyph.

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
This commit is contained in:
Dave Davenport 2016-07-30 20:39:45 +02:00 committed by GitHub
parent 4be25abad7
commit 4ad2c37eea
1 changed files with 10 additions and 16 deletions
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26
source/textbox.c
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@ -56,7 +56,8 @@ typedef struct
#define num_states 3
RowColor colors[num_states];
PangoContext *p_context = NULL;
static PangoContext *p_context = NULL;
static PangoFontMetrics *p_metrics = NULL;
static gboolean textbox_blink ( gpointer data )
{
textbox *tb = (textbox *) data;
@ -317,13 +318,7 @@ static void texbox_update ( textbox *tb )
int tw = textbox_get_font_width ( tb );
x = ( ( tb->widget.w - tw - 2 * SIDE_MARGIN - offset ) ) / 2;
}
short fh = textbox_get_font_height ( tb );
if ( fh > tb->widget.h ) {
y = 0;
}
else {
y = ( ( tb->widget.h - fh ) ) / 2;
}
y = SIDE_MARGIN + ( pango_font_metrics_get_ascent ( p_metrics ) - pango_layout_get_baseline ( tb->layout ) ) / PANGO_SCALE;
// Set ARGB
Color col = tb->color_bg;
@ -695,10 +690,15 @@ void textbox_set_pango_context ( PangoContext *p )
{
textbox_cleanup ();
p_context = g_object_ref ( p );
p_metrics = pango_context_get_metrics ( p_context, NULL, NULL );
}
void textbox_cleanup ( void )
{
if ( p_metrics ) {
pango_font_metrics_unref ( p_metrics );
p_metrics = NULL;
}
if ( p_context ) {
g_object_unref ( p_context );
p_context = NULL;
@ -732,18 +732,12 @@ int textbox_get_font_width ( textbox *tb )
double textbox_get_estimated_char_width ( void )
{
// Get width
PangoFontMetrics *metric = pango_context_get_metrics ( p_context, NULL, NULL );
int width = pango_font_metrics_get_approximate_char_width ( metric );
pango_font_metrics_unref ( metric );
int width = pango_font_metrics_get_approximate_char_width ( p_metrics );
return ( width ) / (double) PANGO_SCALE;
}
int textbox_get_estimated_char_height ( void )
{
// Get width
PangoFontMetrics *metric = pango_context_get_metrics ( p_context, NULL, NULL );
int height = pango_font_metrics_get_ascent ( metric ) + pango_font_metrics_get_descent ( metric );
pango_font_metrics_unref ( metric );
int height = pango_font_metrics_get_ascent ( p_metrics ) + pango_font_metrics_get_descent ( p_metrics );
return ( height ) / PANGO_SCALE + 2 * SIDE_MARGIN;
}