applications/gnome-control-center
4
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

wacom: Use Pango and GTK+ to render text

Browse source 
Rather than cairo directly, with all that it entails.
This commit is contained in:
Bastien Nocera 2012-01-11 16:13:13 +00:00
parent d00e7ee0bd
commit 03a18c7dc4
1 changed files with 68 additions and 68 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

136
panels/wacom/calibrator/gui_gtk.c
View file

@ -31,24 +31,22 @@
#include "gui_gtk.h"
/* Timeout parameters */
const int time_step = 100; /* in milliseconds */
const int max_time = 15000; /* 5000 = 5 sec */
#define TIME_STEP 100 /* in milliseconds */
#define MAX_TIME 15000 /* 5000 = 5 sec */
/* Clock appereance */
const int cross_lines = 25;
const int cross_circle = 4;
const int clock_radius = 50;
const int clock_line_width = 10;
#define CROSS_LINES 25
#define CROSS_CIRCLE 4
#define CLOCK_RADIUS 50
#define CLOCK_LINE_WIDTH 10
/* Text printed on screen */
const int font_size = 16;
#define HELP_LINES (sizeof help_text / sizeof help_text[0])
const char *help_text[] = {
"Touchscreen Calibration",
"Press the point, use a stylus to increase precision.",
"",
const char *help_text =
"Touchscreen Calibration\n"
"Press the point, use a stylus to increase precision.\n"
"\n"
"(To abort, press any key or wait)"
};
;
static void
set_display_size(struct CalibArea *calib_area,
@ -100,42 +98,39 @@ draw(GtkWidget *widget, cairo_t *cr, gpointer data)
{
struct CalibArea *calib_area = (struct CalibArea*)data;
int i;
double text_height;
double text_width;
double x;
double y;
cairo_text_extents_t extent;
PangoLayout *layout;
PangoRectangle logical_rect;
GtkStyleContext *context;
resize_display(calib_area);
/* Print the text */
cairo_set_font_size(cr, font_size);
text_height = -1;
text_width = -1;
for (i = 0; i != HELP_LINES; i++)
{
cairo_text_extents(cr, help_text[i], &extent);
text_width = MAX(text_width, extent.width);
text_height = MAX(text_height, extent.height);
}
text_height += 2;
context = gtk_widget_get_style_context (widget);
x = (calib_area->display_width - text_width) / 2;
y = (calib_area->display_height - text_height) / 2 - 60;
/* Print the text */
layout = pango_layout_new (gtk_widget_get_pango_context (widget));
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
pango_layout_set_text (layout, help_text, -1);
pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
x = (calib_area->display_width - logical_rect.width) / 2 + logical_rect.x;
y = (calib_area->display_height - logical_rect.height) / 2 - logical_rect.height - 20 + logical_rect.y;
cairo_set_line_width(cr, 2);
cairo_rectangle(cr, x - 10, y - (HELP_LINES*text_height) - 10,
text_width + 20, (HELP_LINES*text_height) + 20);
cairo_rectangle(cr, x - 10, y - 10,
logical_rect.width + 20, logical_rect.height + 20);
/* Print help lines */
y -= 3;
for (i = HELP_LINES-1; i != -1; i--)
{
cairo_text_extents(cr, help_text[i], &extent);
cairo_move_to(cr, x + (text_width-extent.width)/2, y);
cairo_show_text(cr, help_text[i]);
y -= text_height;
}
cairo_stroke(cr);
cairo_save (cr);
gtk_render_layout (context, cr,
x + logical_rect.x,
y + logical_rect.y,
layout);
g_object_unref (layout);
cairo_restore(cr);
/* Draw the points */
for (i = 0; i <= calib_area->calibrator->num_clicks; i++)
@ -147,48 +142,53 @@ draw(GtkWidget *widget, cairo_t *cr, gpointer data)
cairo_set_source_rgb(cr, 0.8, 0.0, 0.0);
cairo_set_line_width(cr, 1);
cairo_move_to(cr, calib_area->X[i] - cross_lines, calib_area->Y[i]);
cairo_rel_line_to(cr, cross_lines*2, 0);
cairo_move_to(cr, calib_area->X[i], calib_area->Y[i] - cross_lines);
cairo_rel_line_to(cr, 0, cross_lines*2);
cairo_move_to(cr, calib_area->X[i] - CROSS_LINES, calib_area->Y[i]);
cairo_rel_line_to(cr, CROSS_LINES*2, 0);
cairo_move_to(cr, calib_area->X[i], calib_area->Y[i] - CROSS_LINES);
cairo_rel_line_to(cr, 0, CROSS_LINES*2);
cairo_stroke(cr);
cairo_arc(cr, calib_area->X[i], calib_area->Y[i], cross_circle, 0.0, 2.0 * M_PI);
cairo_arc(cr, calib_area->X[i], calib_area->Y[i], CROSS_CIRCLE, 0.0, 2.0 * M_PI);
cairo_stroke(cr);
}
/* Draw the clock background */
cairo_arc(cr, calib_area->display_width/2, calib_area->display_height/2, clock_radius/2, 0.0, 2.0 * M_PI);
cairo_arc(cr, calib_area->display_width/2, calib_area->display_height/2, CLOCK_RADIUS/2, 0.0, 2.0 * M_PI);
cairo_set_source_rgb(cr, 0.5, 0.5, 0.5);
cairo_fill_preserve(cr);
cairo_stroke(cr);
cairo_set_line_width(cr, clock_line_width);
cairo_arc(cr, calib_area->display_width/2, calib_area->display_height/2, (clock_radius - clock_line_width)/2,
3/2.0*M_PI, (3/2.0*M_PI) + ((double)calib_area->time_elapsed/(double)max_time) * 2*M_PI);
cairo_set_line_width(cr, CLOCK_LINE_WIDTH);
cairo_arc(cr, calib_area->display_width/2, calib_area->display_height/2, (CLOCK_RADIUS - CLOCK_LINE_WIDTH)/2,
3/2.0*M_PI, (3/2.0*M_PI) + ((double)calib_area->time_elapsed/(double)MAX_TIME) * 2*M_PI);
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
cairo_stroke(cr);
/* Draw the message (if any) */
if (calib_area->message != NULL)
{
/* Frame the message */
cairo_set_font_size(cr, font_size);
cairo_text_extents(cr, calib_area->message, &extent);
text_width = extent.width;
text_height = extent.height;
layout = pango_layout_new (gtk_widget_get_pango_context (widget));
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
pango_layout_set_text (layout, calib_area->message, -1);
pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
x = (calib_area->display_width - text_width) / 2;
y = (calib_area->display_height - text_height + clock_radius) / 2 + 60;
x = (calib_area->display_width - logical_rect.width) / 2 + logical_rect.x;
y = (calib_area->display_height - logical_rect.height + CLOCK_RADIUS) / 2 + 60 + logical_rect.y;
cairo_set_line_width(cr, 2);
cairo_rectangle(cr, x - 10, y - text_height - 10,
text_width + 20, text_height + 25);
cairo_rectangle(cr, x - 10, y - logical_rect.height - 10,
logical_rect.width + 20, logical_rect.height + 25);
/* Print the message */
cairo_move_to(cr, x, y);
cairo_show_text(cr, calib_area->message);
cairo_stroke(cr);
cairo_save (cr);
gtk_render_layout (context, cr,
x + logical_rect.x,
y + logical_rect.y,
layout);
g_object_unref (layout);
cairo_restore(cr);
}
}
@ -264,8 +264,8 @@ on_timer_signal(struct CalibArea *calib_area)
GdkWindow *win;
GtkWidget *parent = gtk_widget_get_parent(calib_area->drawing_area);
calib_area->time_elapsed += time_step;
if (calib_area->time_elapsed > max_time || parent == NULL)
calib_area->time_elapsed += TIME_STEP;
if (calib_area->time_elapsed > MAX_TIME || parent == NULL)
{
if (parent)
gtk_widget_destroy(parent);
@ -277,10 +277,10 @@ on_timer_signal(struct CalibArea *calib_area)
if (win)
{
GdkRectangle rect;
rect.x = calib_area->display_width/2 - clock_radius - clock_line_width;
rect.y = calib_area->display_height/2 - clock_radius - clock_line_width;
rect.width = 2 * clock_radius + 1 + 2 * clock_line_width;
rect.height = 2 * clock_radius + 1 + 2 * clock_line_width;
rect.x = calib_area->display_width/2 - CLOCK_RADIUS - CLOCK_LINE_WIDTH;
rect.y = calib_area->display_height/2 - CLOCK_RADIUS - CLOCK_LINE_WIDTH;
rect.width = 2 * CLOCK_RADIUS + 1 + 2 * CLOCK_LINE_WIDTH;
rect.height = 2 * CLOCK_RADIUS + 1 + 2 * CLOCK_LINE_WIDTH;
gdk_window_invalidate_rect(win, &rect, FALSE);
}
@ -324,7 +324,7 @@ CalibrationArea_(struct Calib *c)
}
/* Setup timer for animation */
calib_area->anim_id = g_timeout_add(time_step, (GSourceFunc)on_timer_signal, calib_area);
calib_area->anim_id = g_timeout_add(TIME_STEP, (GSourceFunc)on_timer_signal, calib_area);
return calib_area;
}