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