[134] | 1 | /* |
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| 2 | * Copyright (C) 2008 Red Hat, Inc. |
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| 3 | * |
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| 4 | * This program is free software; you can redistribute it and/or modify |
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| 5 | * it under the terms of the GNU General Public License as published by |
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| 6 | * the Free Software Foundation; either version 2 of the License, or |
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| 7 | * (at your option) any later version. |
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| 8 | * |
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| 9 | * This program is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | * GNU General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU General Public License |
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| 15 | * along with this program; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 17 | * |
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| 18 | * Written by: Ray Strode <rstrode@redhat.com> |
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| 19 | */ |
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| 20 | |
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| 21 | #include "config.h" |
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| 22 | #include "gdm-cell-renderer-timer.h" |
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| 23 | #include <glib/gi18n.h> |
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| 24 | |
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| 25 | #define GDM_CELL_RENDERER_TIMER_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object), GDM_TYPE_CELL_RENDERER_TIMER, GdmCellRendererTimerPrivate)) |
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| 26 | |
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| 27 | struct _GdmCellRendererTimerPrivate |
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| 28 | { |
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| 29 | gdouble value; |
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| 30 | }; |
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| 31 | |
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| 32 | enum |
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| 33 | { |
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| 34 | PROP_0, |
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| 35 | PROP_VALUE, |
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| 36 | }; |
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| 37 | |
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| 38 | G_DEFINE_TYPE (GdmCellRendererTimer, gdm_cell_renderer_timer, GTK_TYPE_CELL_RENDERER) |
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| 39 | |
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| 40 | static void |
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| 41 | gdm_cell_renderer_timer_get_property (GObject *object, |
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| 42 | guint param_id, |
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| 43 | GValue *value, |
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| 44 | GParamSpec *pspec) |
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| 45 | { |
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| 46 | GdmCellRendererTimer *renderer; |
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| 47 | |
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| 48 | renderer = GDM_CELL_RENDERER_TIMER (object); |
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| 49 | |
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| 50 | switch (param_id) { |
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| 51 | case PROP_VALUE: |
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| 52 | g_value_set_double (value, renderer->priv->value); |
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| 53 | break; |
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| 54 | default: |
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| 55 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec); |
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| 56 | } |
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| 57 | } |
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| 58 | |
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| 59 | static void |
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| 60 | gdm_cell_renderer_timer_set_value (GdmCellRendererTimer *renderer, |
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| 61 | gdouble value) |
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| 62 | { |
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| 63 | renderer->priv->value = value; |
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| 64 | } |
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| 65 | |
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| 66 | static void |
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| 67 | gdm_cell_renderer_timer_set_property (GObject *object, |
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| 68 | guint param_id, |
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| 69 | const GValue *value, |
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| 70 | GParamSpec *pspec) |
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| 71 | { |
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| 72 | GdmCellRendererTimer *renderer; |
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| 73 | |
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| 74 | renderer = GDM_CELL_RENDERER_TIMER (object); |
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| 75 | |
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| 76 | switch (param_id) { |
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| 77 | case PROP_VALUE: |
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| 78 | gdm_cell_renderer_timer_set_value (renderer, |
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| 79 | g_value_get_double (value)); |
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| 80 | break; |
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| 81 | default: |
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| 82 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec); |
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| 83 | } |
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| 84 | } |
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| 85 | |
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| 86 | static void |
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| 87 | gdm_cell_renderer_timer_get_size (GtkCellRenderer *cell, |
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| 88 | GtkWidget *widget, |
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| 89 | GdkRectangle *cell_area, |
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| 90 | gint *x_offset, |
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| 91 | gint *y_offset, |
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| 92 | gint *width, |
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| 93 | gint *height) |
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| 94 | { |
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| 95 | |
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| 96 | GdmCellRendererTimer *renderer; |
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| 97 | |
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| 98 | renderer = GDM_CELL_RENDERER_TIMER (cell); |
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| 99 | |
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| 100 | if (cell_area != NULL) { |
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| 101 | if (x_offset != NULL) { |
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| 102 | *x_offset = 0; |
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| 103 | } |
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| 104 | |
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| 105 | if (y_offset != NULL) { |
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| 106 | *y_offset = 0; |
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| 107 | } |
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| 108 | } |
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| 109 | |
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| 110 | if (width != NULL) { |
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| 111 | if (cell->width >= 0) { |
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| 112 | *width = cell->width; |
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| 113 | } else { |
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| 114 | *width = renderer->priv->value <= G_MINDOUBLE? 0 : 64; |
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| 115 | } |
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| 116 | } |
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| 117 | |
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| 118 | if (height != NULL) { |
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| 119 | if (cell->height >= 0) { |
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| 120 | *height = cell->height; |
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| 121 | } else { |
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| 122 | *height = renderer->priv->value <= G_MINDOUBLE? 0 : 64; |
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| 123 | } |
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| 124 | } |
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| 125 | } |
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| 126 | |
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| 127 | static double |
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| 128 | get_opacity_for_value (double value) |
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| 129 | { |
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| 130 | const double start_value = 0.05; |
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| 131 | const double end_value = 0.33; |
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| 132 | |
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| 133 | if (value < start_value) { |
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| 134 | return 0.0; |
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| 135 | } |
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| 136 | |
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| 137 | if (value >= end_value) { |
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| 138 | return 1.0; |
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| 139 | } |
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| 140 | |
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| 141 | return ((value - start_value) / (end_value - start_value)); |
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| 142 | } |
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| 143 | |
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| 144 | static void |
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| 145 | draw_timer (GdmCellRendererTimer *renderer, |
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| 146 | cairo_t *context, |
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| 147 | GdkColor *fg, |
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| 148 | GdkColor *bg, |
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| 149 | int width, |
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| 150 | int height) |
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| 151 | { |
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| 152 | double radius; |
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| 153 | double opacity; |
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| 154 | |
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| 155 | opacity = get_opacity_for_value (renderer->priv->value); |
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| 156 | |
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| 157 | if (opacity <= G_MINDOUBLE) { |
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| 158 | return; |
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| 159 | } |
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| 160 | |
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| 161 | radius = .5 * (MIN (width, height) / 2.0); |
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| 162 | |
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| 163 | cairo_translate (context, width / 2., height / 2.); |
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| 164 | |
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| 165 | cairo_set_source_rgba (context, |
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| 166 | fg->red / 65535.0, |
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| 167 | fg->green / 65535.0, |
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| 168 | fg->blue / 65535.0, |
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| 169 | opacity); |
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| 170 | |
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| 171 | cairo_move_to (context, 0, 0); |
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| 172 | cairo_arc (context, 0, 0, radius + 1, 0, 2 * G_PI); |
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| 173 | cairo_fill (context); |
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| 174 | |
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| 175 | cairo_set_operator (context, CAIRO_OPERATOR_SOURCE); |
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| 176 | cairo_set_source_rgb (context, |
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| 177 | bg->red / 65535.0, |
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| 178 | bg->green / 65535.0, |
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| 179 | bg->blue / 65535.0); |
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| 180 | cairo_move_to (context, 0, 0); |
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| 181 | cairo_arc (context, 0, 0, radius, - G_PI / 2, |
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| 182 | renderer->priv->value * 2 * G_PI - G_PI / 2); |
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| 183 | cairo_clip (context); |
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| 184 | cairo_paint_with_alpha (context, opacity); |
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| 185 | } |
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| 186 | |
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| 187 | static void |
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| 188 | gdm_cell_renderer_timer_render (GtkCellRenderer *cell, |
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| 189 | GdkWindow *window, |
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| 190 | GtkWidget *widget, |
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| 191 | GdkRectangle *background_area, |
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| 192 | GdkRectangle *cell_area, |
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| 193 | GdkRectangle *expose_area, |
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| 194 | GtkCellRendererState renderer_state) |
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| 195 | { |
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| 196 | GdmCellRendererTimer *renderer; |
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| 197 | cairo_t *context; |
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| 198 | GtkStateType widget_state; |
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| 199 | |
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| 200 | renderer = GDM_CELL_RENDERER_TIMER (cell); |
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| 201 | |
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| 202 | if (renderer->priv->value <= G_MINDOUBLE) { |
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| 203 | return; |
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| 204 | } |
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| 205 | |
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| 206 | context = gdk_cairo_create (GDK_DRAWABLE (window)); |
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| 207 | |
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| 208 | if (expose_area != NULL) { |
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| 209 | gdk_cairo_rectangle (context, expose_area); |
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| 210 | cairo_clip (context); |
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| 211 | } |
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| 212 | |
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| 213 | cairo_translate (context, |
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| 214 | cell_area->x + cell->xpad, |
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| 215 | cell_area->y + cell->ypad); |
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| 216 | |
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| 217 | widget_state = GTK_STATE_NORMAL; |
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| 218 | if (renderer_state & GTK_CELL_RENDERER_SELECTED) { |
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| 219 | if (GTK_WIDGET_HAS_FOCUS (widget)) { |
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| 220 | widget_state = GTK_STATE_SELECTED; |
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| 221 | } else { |
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| 222 | widget_state = GTK_STATE_ACTIVE; |
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| 223 | } |
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| 224 | } |
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| 225 | |
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| 226 | if (renderer_state & GTK_CELL_RENDERER_INSENSITIVE) { |
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| 227 | widget_state = GTK_STATE_INSENSITIVE; |
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| 228 | } |
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| 229 | |
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| 230 | draw_timer (renderer, context, |
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| 231 | &widget->style->text_aa[widget_state], |
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| 232 | &widget->style->base[widget_state], |
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| 233 | cell_area->width, cell_area->height); |
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| 234 | |
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| 235 | cairo_destroy (context); |
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| 236 | } |
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| 237 | |
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| 238 | static void |
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| 239 | gdm_cell_renderer_timer_class_init (GdmCellRendererTimerClass *klass) |
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| 240 | { |
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| 241 | GObjectClass *object_class = G_OBJECT_CLASS (klass); |
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| 242 | GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass); |
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| 243 | |
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| 244 | object_class->get_property = gdm_cell_renderer_timer_get_property; |
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| 245 | object_class->set_property = gdm_cell_renderer_timer_set_property; |
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| 246 | |
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| 247 | cell_class->get_size = gdm_cell_renderer_timer_get_size; |
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| 248 | cell_class->render = gdm_cell_renderer_timer_render; |
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| 249 | |
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| 250 | g_object_class_install_property (object_class, |
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| 251 | PROP_VALUE, |
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| 252 | g_param_spec_double ("value", |
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| 253 | _("Value"), |
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| 254 | _("percentage of time complete"), |
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| 255 | 0.0, 1.0, 0.0, |
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| 256 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
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| 257 | |
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| 258 | g_type_class_add_private (object_class, |
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| 259 | sizeof (GdmCellRendererTimerPrivate)); |
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| 260 | } |
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| 261 | |
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| 262 | static void |
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| 263 | gdm_cell_renderer_timer_init (GdmCellRendererTimer *renderer) |
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| 264 | { |
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| 265 | renderer->priv = GDM_CELL_RENDERER_TIMER_GET_PRIVATE (renderer); |
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| 266 | } |
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| 267 | |
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| 268 | GtkCellRenderer* |
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| 269 | gdm_cell_renderer_timer_new (void) |
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| 270 | { |
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| 271 | return g_object_new (GDM_TYPE_CELL_RENDERER_TIMER, NULL); |
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| 272 | } |
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| 273 | |
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