1 /*
2 * Copyright (C) 2009, 2010 Hermann Meyer, James Warden, Andreas Degert
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include "GxLevelSlider.h"
20 #include "log_meter.h"
21
22 #define P_(s) (s) // FIXME -> gettext
23
24 static gboolean gx_level_slider_draw (GtkWidget *widget, cairo_t *cr);
25 static void gx_level_slider_get_preferred_width (GtkWidget *widget, gint *min_width, gint *natural_width);
26 static void gx_level_slider_get_preferred_height (GtkWidget *widget, gint *min_height, gint *natural_height);
27 static void gx_level_slider_size_request (GtkWidget *widget, gint *width, gint *height);
28 static gboolean gx_level_slider_button_press (GtkWidget *widget, GdkEventButton *event);
29 static gboolean gx_level_slider_pointer_motion (GtkWidget *widget, GdkEventMotion *event);
30 static const char *get_stock_id(GtkWidget *widget);
31
G_DEFINE_TYPE(GxLevelSlider,gx_level_slider,GX_TYPE_VSLIDER)32 G_DEFINE_TYPE(GxLevelSlider, gx_level_slider, GX_TYPE_VSLIDER)
33
34 static void gx_level_slider_class_init(GxLevelSliderClass *klass)
35 {
36 GtkWidgetClass *widget_class = (GtkWidgetClass*) klass;
37
38 widget_class->draw = gx_level_slider_draw;
39 widget_class->get_preferred_width = gx_level_slider_get_preferred_width;
40 widget_class->get_preferred_height = gx_level_slider_get_preferred_height;
41 widget_class->button_press_event = gx_level_slider_button_press;
42 widget_class->motion_notify_event = gx_level_slider_pointer_motion;
43 widget_class->enter_notify_event = NULL;
44 widget_class->leave_notify_event = NULL;
45 klass->parent_class.stock_id = "levelslider";
46 gtk_widget_class_install_style_property(
47 widget_class,
48 g_param_spec_int("slider-width",P_("size of slider"),
49 P_("Height of movable part of vslider"),
50 0, 100, 5, GParamFlags(G_PARAM_READABLE|G_PARAM_STATIC_STRINGS)));
51 gtk_widget_class_install_style_property(
52 GTK_WIDGET_CLASS(klass),
53 g_param_spec_string("icon-name",
54 P_("Icon Name"),
55 P_("Icon to use as Slider"),
56 NULL,
57 GParamFlags(G_PARAM_READABLE|G_PARAM_STATIC_STRINGS)));
58 gtk_widget_class_set_css_name(widget_class, "gx-level-slider");
59 }
60
get_stock_id(GtkWidget * widget)61 static const char *get_stock_id(GtkWidget *widget)
62 {
63 gchar *icon;
64 gtk_widget_style_get(widget, "icon-name", &icon, NULL);
65 if (icon) {
66 return icon;
67 } else {
68 return GX_LEVEL_SLIDER_CLASS(
69 GTK_WIDGET_GET_CLASS(widget))->parent_class.stock_id;
70 }
71 }
72
gx_level_slider_get_preferred_width(GtkWidget * widget,gint * min_width,gint * natural_width)73 static void gx_level_slider_get_preferred_width (GtkWidget *widget, gint *min_width, gint *natural_width)
74 {
75 gint width, height;
76 gx_level_slider_size_request(widget, &width, &height);
77
78 if (min_width) {
79 *min_width = width;
80 }
81 if (natural_width) {
82 *natural_width = width;
83 }
84 }
85
gx_level_slider_get_preferred_height(GtkWidget * widget,gint * min_height,gint * natural_height)86 static void gx_level_slider_get_preferred_height (GtkWidget *widget, gint *min_height, gint *natural_height)
87 {
88 gint width, height;
89 gx_level_slider_size_request(widget, &width, &height);
90
91 if (min_height) {
92 *min_height = height;
93 }
94 if (natural_height) {
95 *natural_height = height;
96 }
97 }
98
99
gx_level_slider_size_request(GtkWidget * widget,gint * width,gint * height)100 static void gx_level_slider_size_request (GtkWidget *widget, gint *width, gint *height)
101 {
102 g_assert(GX_IS_LEVEL_SLIDER(widget));
103 gint slider_height;
104 gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
105 GdkPixbuf *pb = gtk_icon_theme_load_icon(gtk_icon_theme_get_default(),
106 get_stock_id(widget), -1,
107 GTK_ICON_LOOKUP_GENERIC_FALLBACK, nullptr);
108 *width = gdk_pixbuf_get_width(pb);
109 *height = (gdk_pixbuf_get_height(pb) + slider_height) / 2;
110 _gx_regler_calc_size_request(GX_REGLER(widget), width, height, FALSE);
111 g_clear_object(&pb);
112 }
113
level_slider_expose(GtkWidget * widget,cairo_t * cr,GdkRectangle * rect,gdouble sliderstate,GdkPixbuf * image)114 static void level_slider_expose(
115 GtkWidget *widget, cairo_t *cr, GdkRectangle *rect, gdouble sliderstate, GdkPixbuf *image)
116 {
117 GtkAdjustment *adj = gtk_range_get_adjustment(GTK_RANGE(widget));
118 sliderstate = rect->height * log_meter(gtk_adjustment_get_value(adj));
119 gdk_cairo_set_source_pixbuf(cr, image, rect->x, rect->y - (gint)sliderstate);
120 cairo_rectangle(cr, rect->x, rect->y, rect->width, rect->height);
121 cairo_fill(cr);
122 }
123
gx_level_slider_draw(GtkWidget * widget,cairo_t * cr)124 static gboolean gx_level_slider_draw(GtkWidget *widget, cairo_t *cr)
125 {
126 g_assert(GX_IS_LEVEL_SLIDER(widget));
127 gint slider_height;
128 GdkRectangle image_rect, value_rect;
129 GdkPixbuf *pb = gtk_icon_theme_load_icon(gtk_icon_theme_get_default(),
130 get_stock_id(widget), -1,
131 GTK_ICON_LOOKUP_GENERIC_FALLBACK, nullptr);
132 gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
133 image_rect.width = gdk_pixbuf_get_width(pb);
134 image_rect.height = (gdk_pixbuf_get_height(pb) + slider_height) / 2;
135 gdouble sliderstate = _gx_regler_get_step_pos(GX_REGLER(widget), image_rect.height-slider_height);
136 _gx_regler_get_positions(GX_REGLER(widget), &image_rect, &value_rect, false);
137 level_slider_expose(widget, cr, &image_rect, sliderstate, pb);
138 _gx_regler_simple_display_value(GX_REGLER(widget), cr, &value_rect);
139 g_clear_object(&pb);
140 return FALSE;
141 }
142
get_width_height(GtkWidget * widget,GdkRectangle * r)143 static inline void get_width_height(GtkWidget *widget, GdkRectangle *r)
144 {
145 GdkPixbuf *pb = gtk_icon_theme_load_icon(gtk_icon_theme_get_default(),
146 get_stock_id(widget), -1,
147 GTK_ICON_LOOKUP_GENERIC_FALLBACK, nullptr);
148 r->width = gdk_pixbuf_get_width(pb);
149 r->height = gdk_pixbuf_get_height(pb);
150 g_clear_object(&pb);
151 }
152
slider_set_from_pointer(GtkWidget * widget,int state,gdouble x,gdouble y,gboolean drag,gint button,GdkEventButton * event)153 static gboolean slider_set_from_pointer(GtkWidget *widget, int state, gdouble x, gdouble y, gboolean drag, gint button, GdkEventButton *event)
154 {
155 GdkRectangle image_rect, value_rect;
156 gint slider_height;
157 gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
158 get_width_height(widget, &image_rect);
159 image_rect.height = (image_rect.height + slider_height) / 2;
160 _gx_regler_get_positions(GX_REGLER(widget), &image_rect, &value_rect, false);
161 if (!drag && !_approx_in_rectangle(x, y, &image_rect)) {
162 return FALSE;
163 }
164 if (button == 3) {
165 gboolean ret;
166 g_signal_emit_by_name(GX_REGLER(widget), "value-entry", &image_rect, event, &ret);
167 return FALSE;
168 }
169 static double last_y = 2e20;
170
171 GtkAdjustment *adj = gtk_range_get_adjustment(GTK_RANGE(widget));
172 double slidery = image_rect.height;
173 double posy = slidery - y + image_rect.y;
174 double value;
175 if (!drag) {
176 last_y = posy;
177 if (event && event->type == GDK_2BUTTON_PRESS) {
178 gtk_range_set_value(GTK_RANGE(widget), log_meter_inv(posy/image_rect.height));
179 }
180 return TRUE;
181 }
182 double sc = 0.005;
183 if (state & GDK_CONTROL_MASK) {
184 sc = 0.0005;
185 }
186 value = (posy - last_y) * sc;
187 last_y = posy;
188 gtk_range_set_value(GTK_RANGE(widget), gtk_adjustment_get_value(adj) + value * (gtk_adjustment_get_upper(adj) - gtk_adjustment_get_lower(adj)));
189 return TRUE;
190 }
191
gx_level_slider_button_press(GtkWidget * widget,GdkEventButton * event)192 static gboolean gx_level_slider_button_press (GtkWidget *widget, GdkEventButton *event)
193 {
194 g_assert(GX_IS_LEVEL_SLIDER(widget));
195 if (event->button != 1 && event->button != 3) {
196 return FALSE;
197 }
198 gtk_widget_grab_focus(widget);
199 if (slider_set_from_pointer(widget, event->state, event->x, event->y, FALSE, event->button, event)) {
200 gtk_grab_add(widget);
201 }
202 return FALSE;
203 }
204
gx_level_slider_pointer_motion(GtkWidget * widget,GdkEventMotion * event)205 static gboolean gx_level_slider_pointer_motion(GtkWidget *widget, GdkEventMotion *event)
206 {
207 g_assert(GX_IS_LEVEL_SLIDER(widget));
208 if (!gtk_widget_has_grab(widget)) {
209 return FALSE;
210 }
211 gdk_event_request_motions (event);
212 slider_set_from_pointer(widget, event->state, event->x, event->y, TRUE, 0, NULL);
213 return FALSE;
214 }
215
216
gx_level_slider_init(GxLevelSlider * level_slider)217 static void gx_level_slider_init(GxLevelSlider *level_slider)
218 {
219 gtk_widget_set_name (GTK_WIDGET(level_slider),"rack_slider");
220 }
221