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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/browser/gtk/gtk_chrome_button.h" | |
| 6 | |
| 7 #include "base/basictypes.h" | |
| 8 #include "chrome/browser/gtk/nine_box.h" | |
| 9 #include "gfx/gtk_util.h" | |
| 10 #include "grit/app_resources.h" | |
| 11 | |
| 12 namespace { | |
| 13 | |
| 14 // The theme graphics for when the mouse is over the button. | |
| 15 NineBox* g_nine_box_prelight; | |
| 16 // The theme graphics for when the button is clicked. | |
| 17 NineBox* g_nine_box_active; | |
| 18 | |
| 19 } // namespace | |
| 20 | |
| 21 G_BEGIN_DECLS | |
| 22 | |
| 23 #define GTK_CHROME_BUTTON_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o),\ | |
| 24 GTK_TYPE_CHROME_BUTTON,\ | |
| 25 GtkChromeButtonPrivate)) | |
| 26 typedef struct _GtkChromeButtonPrivate GtkChromeButtonPrivate; | |
| 27 | |
| 28 struct _GtkChromeButtonPrivate { | |
| 29 int paint_state; | |
| 30 | |
| 31 // If true, we use images provided by the theme instead of GTK's default | |
| 32 // button rendering. | |
| 33 gboolean use_gtk_rendering; | |
| 34 | |
| 35 gdouble hover_state; | |
| 36 }; | |
| 37 | |
| 38 G_DEFINE_TYPE(GtkChromeButton, gtk_chrome_button, GTK_TYPE_BUTTON) | |
| 39 static gboolean gtk_chrome_button_expose(GtkWidget* widget, | |
| 40 GdkEventExpose* event); | |
| 41 | |
| 42 static void gtk_chrome_button_class_init(GtkChromeButtonClass* button_class) { | |
| 43 gtk_rc_parse_string( | |
| 44 "style \"chrome-button\" {" | |
| 45 " xthickness = 2 " | |
| 46 " GtkButton::child-displacement-x = 0" | |
| 47 " GtkButton::child-displacement-y = 0" | |
| 48 " GtkButton::inner-border = { 0, 0, 0, 0 }" | |
| 49 "}" | |
| 50 "widget_class \"*.<GtkChromeButton>\" style \"chrome-button\""); | |
| 51 | |
| 52 GtkWidgetClass* widget_class = | |
| 53 reinterpret_cast<GtkWidgetClass*>(button_class); | |
| 54 widget_class->expose_event = gtk_chrome_button_expose; | |
| 55 | |
| 56 g_nine_box_prelight = new NineBox( | |
| 57 IDR_TEXTBUTTON_TOP_LEFT_H, | |
| 58 IDR_TEXTBUTTON_TOP_H, | |
| 59 IDR_TEXTBUTTON_TOP_RIGHT_H, | |
| 60 IDR_TEXTBUTTON_LEFT_H, | |
| 61 IDR_TEXTBUTTON_CENTER_H, | |
| 62 IDR_TEXTBUTTON_RIGHT_H, | |
| 63 IDR_TEXTBUTTON_BOTTOM_LEFT_H, | |
| 64 IDR_TEXTBUTTON_BOTTOM_H, | |
| 65 IDR_TEXTBUTTON_BOTTOM_RIGHT_H); | |
| 66 | |
| 67 g_nine_box_active = new NineBox( | |
| 68 IDR_TEXTBUTTON_TOP_LEFT_P, | |
| 69 IDR_TEXTBUTTON_TOP_P, | |
| 70 IDR_TEXTBUTTON_TOP_RIGHT_P, | |
| 71 IDR_TEXTBUTTON_LEFT_P, | |
| 72 IDR_TEXTBUTTON_CENTER_P, | |
| 73 IDR_TEXTBUTTON_RIGHT_P, | |
| 74 IDR_TEXTBUTTON_BOTTOM_LEFT_P, | |
| 75 IDR_TEXTBUTTON_BOTTOM_P, | |
| 76 IDR_TEXTBUTTON_BOTTOM_RIGHT_P); | |
| 77 | |
| 78 GObjectClass* gobject_class = G_OBJECT_CLASS(button_class); | |
| 79 g_type_class_add_private(gobject_class, sizeof(GtkChromeButtonPrivate)); | |
| 80 } | |
| 81 | |
| 82 static void gtk_chrome_button_init(GtkChromeButton* button) { | |
| 83 GtkChromeButtonPrivate* priv = GTK_CHROME_BUTTON_GET_PRIVATE(button); | |
| 84 priv->paint_state = -1; | |
| 85 priv->use_gtk_rendering = FALSE; | |
| 86 priv->hover_state = -1.0; | |
| 87 | |
| 88 GTK_WIDGET_UNSET_FLAGS(button, GTK_CAN_FOCUS); | |
| 89 } | |
| 90 | |
| 91 static gboolean gtk_chrome_button_expose(GtkWidget* widget, | |
| 92 GdkEventExpose* event) { | |
| 93 GtkChromeButtonPrivate *priv = GTK_CHROME_BUTTON_GET_PRIVATE(widget); | |
| 94 int paint_state = priv->paint_state < 0 ? | |
| 95 GTK_WIDGET_STATE(widget) : priv->paint_state; | |
| 96 | |
| 97 if (priv->use_gtk_rendering) { | |
| 98 // We have the superclass handle this expose when we aren't using custom | |
| 99 // rendering AND we're in either the prelight or active state so that we | |
| 100 // get the button border for the current GTK theme drawn. | |
| 101 if (paint_state == GTK_STATE_PRELIGHT || paint_state == GTK_STATE_ACTIVE) { | |
| 102 // Set the state of button->depressed so we paint pressed even if the | |
| 103 // actual state of the button is something else. | |
| 104 GTK_BUTTON(widget)->depressed = (paint_state == GTK_STATE_ACTIVE); | |
| 105 return GTK_WIDGET_CLASS(gtk_chrome_button_parent_class)->expose_event | |
| 106 (widget, event); | |
| 107 } | |
| 108 } else { | |
| 109 double effective_hover_state = paint_state == GTK_STATE_PRELIGHT ? | |
| 110 1.0 : 0.0; | |
| 111 // |paint_state| overrides |hover_state|. | |
| 112 if (priv->hover_state >= 0.0 && priv->paint_state < 0) | |
| 113 effective_hover_state = priv->hover_state; | |
| 114 | |
| 115 if (paint_state == GTK_STATE_ACTIVE) { | |
| 116 g_nine_box_active->RenderToWidget(widget); | |
| 117 } else { | |
| 118 g_nine_box_prelight->RenderToWidgetWithOpacity(widget, | |
| 119 effective_hover_state); | |
| 120 } | |
| 121 } | |
| 122 | |
| 123 // If we have a child widget, draw it. | |
| 124 if (gtk_bin_get_child(GTK_BIN(widget))) { | |
| 125 gtk_container_propagate_expose(GTK_CONTAINER(widget), | |
| 126 gtk_bin_get_child(GTK_BIN(widget)), | |
| 127 event); | |
| 128 } | |
| 129 | |
| 130 return FALSE; | |
| 131 } | |
| 132 | |
| 133 GtkWidget* gtk_chrome_button_new(void) { | |
| 134 return GTK_WIDGET(g_object_new(GTK_TYPE_CHROME_BUTTON, NULL)); | |
| 135 } | |
| 136 | |
| 137 void gtk_chrome_button_set_paint_state(GtkChromeButton* button, | |
| 138 GtkStateType state) { | |
| 139 g_return_if_fail(GTK_IS_CHROME_BUTTON(button)); | |
| 140 | |
| 141 GtkChromeButtonPrivate *priv = GTK_CHROME_BUTTON_GET_PRIVATE(button); | |
| 142 priv->paint_state = state; | |
| 143 | |
| 144 gtk_widget_queue_draw(GTK_WIDGET(button)); | |
| 145 } | |
| 146 | |
| 147 void gtk_chrome_button_unset_paint_state(GtkChromeButton* button) { | |
| 148 g_return_if_fail(GTK_IS_CHROME_BUTTON(button)); | |
| 149 | |
| 150 GtkChromeButtonPrivate *priv = GTK_CHROME_BUTTON_GET_PRIVATE(button); | |
| 151 priv->paint_state = -1; | |
| 152 | |
| 153 gtk_widget_queue_draw(GTK_WIDGET(button)); | |
| 154 } | |
| 155 | |
| 156 void gtk_chrome_button_set_use_gtk_rendering(GtkChromeButton* button, | |
| 157 gboolean value) { | |
| 158 g_return_if_fail(GTK_IS_CHROME_BUTTON(button)); | |
| 159 GtkChromeButtonPrivate *priv = GTK_CHROME_BUTTON_GET_PRIVATE(button); | |
| 160 priv->use_gtk_rendering = value; | |
| 161 } | |
| 162 | |
| 163 void gtk_chrome_button_set_hover_state(GtkChromeButton* button, | |
| 164 gdouble state) { | |
| 165 GtkChromeButtonPrivate* priv = GTK_CHROME_BUTTON_GET_PRIVATE(button); | |
| 166 if (state >= 0.0 && state <= 1.0) | |
| 167 priv->hover_state = state; | |
| 168 else | |
| 169 priv->hover_state = -1.0; | |
| 170 gtk_widget_queue_draw(GTK_WIDGET(button)); | |
| 171 } | |
| 172 | |
| 173 G_END_DECLS | |
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