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Add CcStrengthBar to display a smaller and neater progress bar

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This will be used in the power and user-accounts panels.
This commit is contained in:
Richard Hughes 2012-02-14 16:47:59 +00:00
parent 16b872c8dd
commit 5d1b2d60a4
3 changed files with 459 additions and 0 deletions
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2
shell/Makefile.am
View file

@ -29,6 +29,8 @@ gnome_control_center_SOURCES = \
cc-shell-model.h \
cc-editable-entry.c \
cc-editable-entry.h \
cc-strength-bar.c \
cc-strength-bar.h \
cc-panel.c \
cc-panel.h \
cc-shell.c \

388
shell/cc-strength-bar.c Normal file
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@ -0,0 +1,388 @@
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
*
* Copyright 2010-2012 Red Hat, Inc,
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Written by:
* Matthias Clasen <mclasen@redhat.com>
* Richard Hughes <richard@hughsie.com>
*/
#include "config.h"
#include <glib.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include "cc-strength-bar.h"
#define GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), UM_TYPE_STRENGTH_BAR, CcStrengthBarPrivate))
struct _CcStrengthBarPrivate
{
gdouble fraction;
gint segments;
};
enum {
PROP_0,
PROP_FRACTION,
PROP_SEGMENTS
};
G_DEFINE_TYPE (CcStrengthBar, cc_strength_bar, GTK_TYPE_WIDGET);
static void
cc_strength_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
CcStrengthBar *bar = CC_STRENGTH_BAR (object);
switch (prop_id) {
case PROP_FRACTION:
cc_strength_bar_set_fraction (bar, g_value_get_double (value));
break;
case PROP_SEGMENTS:
cc_strength_bar_set_segments (bar, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
cc_strength_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
CcStrengthBar *bar = CC_STRENGTH_BAR (object);
switch (prop_id) {
case PROP_FRACTION:
g_value_set_double (value, cc_strength_bar_get_fraction (bar));
break;
case PROP_SEGMENTS:
g_value_set_int (value, cc_strength_bar_get_segments (bar));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
curved_rectangle (cairo_t *cr,
double x0,
double y0,
double width,
double height,
double radius)
{
double x1;
double y1;
x1 = x0 + width;
y1 = y0 + height;
if (!width || !height) {
return;
}
if (width / 2 < radius) {
if (height / 2 < radius) {
cairo_move_to (cr, x0, (y0 + y1) / 2);
cairo_curve_to (cr, x0 ,y0, x0, y0, (x0 + x1) / 2, y0);
cairo_curve_to (cr, x1, y0, x1, y0, x1, (y0 + y1) / 2);
cairo_curve_to (cr, x1, y1, x1, y1, (x1 + x0) / 2, y1);
cairo_curve_to (cr, x0, y1, x0, y1, x0, (y0 + y1) / 2);
} else {
cairo_move_to (cr, x0, y0 + radius);
cairo_curve_to (cr, x0, y0, x0, y0, (x0 + x1) / 2, y0);
cairo_curve_to (cr, x1, y0, x1, y0, x1, y0 + radius);
cairo_line_to (cr, x1, y1 - radius);
cairo_curve_to (cr, x1, y1, x1, y1, (x1 + x0) / 2, y1);
cairo_curve_to (cr, x0, y1, x0, y1, x0, y1 - radius);
}
} else {
if (height / 2 < radius) {
cairo_move_to (cr, x0, (y0 + y1) / 2);
cairo_curve_to (cr, x0, y0, x0 , y0, x0 + radius, y0);
cairo_line_to (cr, x1 - radius, y0);
cairo_curve_to (cr, x1, y0, x1, y0, x1, (y0 + y1) / 2);
cairo_curve_to (cr, x1, y1, x1, y1, x1 - radius, y1);
cairo_line_to (cr, x0 + radius, y1);
cairo_curve_to (cr, x0, y1, x0, y1, x0, (y0 + y1) / 2);
} else {
cairo_move_to (cr, x0, y0 + radius);
cairo_curve_to (cr, x0 , y0 + radius, x0, y0, x0 + radius, y0);
cairo_line_to (cr, x1 - radius, y0);
cairo_curve_to (cr, x1 - radius, y0, x1, y0, x1, y0 + radius);
cairo_line_to (cr, x1, y1 - radius);
cairo_curve_to (cr, x1, y1 - radius, x1, y1, x1 - radius, y1);
cairo_line_to (cr, x0 + radius, y1);
cairo_curve_to (cr, x0 + radius, y1, x0, y1, x0, y1 - radius);
}
}
cairo_close_path (cr);
}
static gboolean
cc_strength_bar_draw (GtkWidget *widget,
cairo_t *cr)
{
CcStrengthBar *bar = CC_STRENGTH_BAR (widget);
const gint padding_end = 3; /* this is the padding at either end */
const gint padding_x = 2; /* this is the padding between elements */
gboolean ret;
GdkRGBA color;
GdkRGBA color2;
gdouble section_width;
gdouble this_width;
gint count;
gint last_x;
gint width, height;
GtkStateFlags state;
GtkStyleContext *context;
guint i;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
/* clip */
cairo_save (cr);
cairo_rectangle (cr,
0, 0,
width, height);
cairo_clip (cr);
/* get gutter color */
ret = gtk_style_context_lookup_color (context,
"@base_color",
&color);
if (!ret) {
/* fall back to white */
color.alpha = 1.0f;
color.red = 1.0;
color.green = 1.0;
color.blue = 1.0;
}
/* border */
cairo_set_line_width (cr, 1);
gdk_cairo_set_source_rgba (cr, &color);
curved_rectangle (cr,
0.5, 0.5,
width - 1, height - 1, 4);
cairo_fill_preserve (cr);
gtk_style_context_get_color (context, state, &color);
gdk_cairo_set_source_rgba (cr, &color);
cairo_stroke (cr);
/* get color of bar */
if (bar->priv->fraction < 0.25) {
ret = gtk_style_context_lookup_color (context,
"warning_color",
&color);
if (!ret) {
/* fall back to red */
color.alpha = 1.0f;
color.red = 0.91;
color.green = 0.16;
color.blue = 0.16;
}
} else if (bar->priv->fraction > 0.75) {
ret = gtk_style_context_lookup_color (context,
"success_color",
&color);
if (!ret) {
/* fall back to green */
color.alpha = 1.0f;
color.red = 0.45;
color.green = 0.82;
color.blue = 0.09;
}
} else {
ret = gtk_style_context_lookup_color (context,
"selected_bg_color",
&color);
if (!ret) {
/* fall back to blue */
color.alpha = 1.0f;
color.red = 0.44;
color.green = 0.62;
color.blue = 0.80;
}
}
/* make darker background color */
color2.alpha = 1.0f;
color2.red = color.red / 1.5;
color2.green = color.green / 1.5;
color2.blue = color.blue / 1.5;
/* nothing hardcoded, so set a number based on the width */
if (bar->priv->segments == -1)
bar->priv->segments = width / 30;
/* print the bar */
section_width = (width - (padding_end * 2) + 2) / (gdouble) bar->priv->segments;
count = bar->priv->fraction * (gdouble) bar->priv->segments;
last_x = -padding_x + padding_end;
for (i = 0; i < count; i++) {
/* do this for each segment as we're clipping to integers
* do avoid antialiased lines */
this_width = (section_width * (i + 1)) - last_x - padding_x;
/* lighter line */
cairo_set_line_width (cr, 1);
gdk_cairo_set_source_rgba (cr, &color);
curved_rectangle (cr,
last_x + padding_x + 0.5, 3.0 + 0.5,
(gint) this_width, height - 7, 4);
cairo_fill (cr);
/* darker line */
gdk_cairo_set_source_rgba (cr, &color2);
curved_rectangle (cr,
last_x + padding_x + 0.5, 3.0 + 0.5,
(gint) this_width, height - 7, 4);
cairo_stroke (cr);
/* square off except the start */
if (i != 0) {
cairo_move_to (cr,
last_x + padding_x + 0.5,
3.0 + 0.5);
cairo_line_to (cr,
last_x + padding_x + 0.5,
height - 3);
cairo_stroke (cr);
}
/* square off except the end */
if (i != bar->priv->segments - 1) {
cairo_move_to (cr,
last_x + padding_x + (gint) this_width + 0.5,
3.0 + 0.5);
cairo_line_to (cr,
last_x + padding_x + (gint) this_width + 0.5,
height - 3);
cairo_stroke (cr);
}
/* increment counter using integers */
last_x += (gint) this_width + padding_x;
}
cairo_restore (cr); /* undo clip */
return FALSE;
}
static void
cc_strength_bar_class_init (CcStrengthBarClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = (GObjectClass*)class;
widget_class = (GtkWidgetClass*)class;
gobject_class->set_property = cc_strength_bar_set_property;
gobject_class->get_property = cc_strength_bar_get_property;
widget_class->draw = cc_strength_bar_draw;
g_object_class_install_property (gobject_class,
PROP_FRACTION,
g_param_spec_double ("fraction",
"Fraction",
"Fraction",
0.0, 1.0, 0.0,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SEGMENTS,
g_param_spec_int ("segments",
"Segments",
"Segments",
-1, 20, -1,
G_PARAM_READWRITE));
g_type_class_add_private (class, sizeof (CcStrengthBarPrivate));
}
static void
cc_strength_bar_init (CcStrengthBar *bar)
{
gtk_widget_set_has_window (GTK_WIDGET (bar), FALSE);
gtk_widget_set_size_request (GTK_WIDGET (bar), 120, 9);
bar->priv = GET_PRIVATE (bar);
bar->priv->fraction = 0.0;
bar->priv->segments = -1;
}
GtkWidget *
cc_strength_bar_new (void)
{
return (GtkWidget*) g_object_new (UM_TYPE_STRENGTH_BAR, NULL);
}
void
cc_strength_bar_set_fraction (CcStrengthBar *bar,
gdouble fraction)
{
bar->priv->fraction = fraction;
g_object_notify (G_OBJECT (bar), "fraction");
if (gtk_widget_is_drawable (GTK_WIDGET (bar)))
gtk_widget_queue_draw (GTK_WIDGET (bar));
}
gdouble
cc_strength_bar_get_fraction (CcStrengthBar *bar)
{
return bar->priv->fraction;
}
gint
cc_strength_bar_get_segments (CcStrengthBar *bar)
{
return bar->priv->segments;
}
void
cc_strength_bar_set_segments (CcStrengthBar *bar,
gint segments)
{
bar->priv->segments = segments;
g_object_notify (G_OBJECT (bar), "segments");
if (gtk_widget_is_drawable (GTK_WIDGET (bar)))
gtk_widget_queue_draw (GTK_WIDGET (bar));
}

69
shell/cc-strength-bar.h Normal file
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@ -0,0 +1,69 @@
/*
* Copyright © 2010 Red Hat, Inc.
*
* Licensed under the GNU General Public License Version 3
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Written by:
* Matthias Clasen <mclasen@redhat.com>
* Richard Hughes <richard@hughsie.com>
*/
#ifndef _CC_STRENGTH_BAR_H_
#define _CC_STRENGTH_BAR_H_
#include <glib-object.h>
#include <gtk/gtk.h>
G_BEGIN_DECLS
#define UM_TYPE_STRENGTH_BAR (cc_strength_bar_get_type ())
#define CC_STRENGTH_BAR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), UM_TYPE_STRENGTH_BAR, \
CcStrengthBar))
#define CC_STRENGTH_BAR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), UM_TYPE_STRENGTH_BAR, \
CcStrengthBarClass))
#define UM_IS_STRENGTH_BAR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), UM_TYPE_STRENGTH_BAR))
#define UM_IS_STRENGTH_BAR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), UM_TYPE_STRENGTH_BAR))
#define CC_STRENGTH_BAR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), UM_TYPE_STRENGTH_BAR, \
CcStrengthBarClass))
typedef struct _CcStrengthBarClass CcStrengthBarClass;
typedef struct _CcStrengthBar CcStrengthBar;
typedef struct _CcStrengthBarPrivate CcStrengthBarPrivate;
struct _CcStrengthBarClass {
GtkWidgetClass parent_class;
};
struct _CcStrengthBar {
GtkWidget parent_instance;
CcStrengthBarPrivate *priv;
};
GType cc_strength_bar_get_type (void) G_GNUC_CONST;
GtkWidget *cc_strength_bar_new (void);
void cc_strength_bar_set_fraction (CcStrengthBar *bar,
gdouble fraction);
gdouble cc_strength_bar_get_fraction (CcStrengthBar *bar);
void cc_strength_bar_set_segments (CcStrengthBar *bar,
gint segments);
gint cc_strength_bar_get_segments (CcStrengthBar *bar);
G_END_DECLS
#endif /* _CC_STRENGTH_BAR_H_ */