Commit 05ab0f22 authored by Matthias Clasen's avatar Matthias Clasen

Add an experiment for overlay scrollbars

This is just meant as a prototype for how we can show a
scroll position indicator for touch. This uses GTK_POLICY_EXTERNAL
to hide the scrolled windows scrollbar while still allowing
scrolling.
parent 1fad6b04
......@@ -26,6 +26,7 @@ testsocket_programs = testsocket testsocket_child
endif
noinst_PROGRAMS = $(TEST_PROGS) \
overlayscroll \
syncscroll \
subsurface \
animated-resizing \
......
/* simple.c
* Copyright (C) 1997 Red Hat, Inc
* Author: Elliot Lee
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gtk/gtk.h>
#include <string.h>
typedef struct {
GtkWidget *sw;
GtkWidget *rv;
gint64 last_scroll_time;
gboolean over;
gboolean dragging;
gboolean autodetect;
gboolean touch_mode;
} IndicatorData;
IndicatorData *
get_indicator_data (GtkWidget *sb)
{
IndicatorData *data;
data = (IndicatorData *) g_object_get_data (G_OBJECT (sb), "indicator-data");
if (!data)
{
data = g_new0 (IndicatorData, 1);
g_object_set_data_full (G_OBJECT (sb), "indicator-data", data, g_free);
}
return data;
}
static gboolean
conceil_scrollbar (gpointer data)
{
GtkWidget *sb = data;
IndicatorData *id = get_indicator_data (sb);
if (g_get_monotonic_time () - id->last_scroll_time >= 1000000 &&
id->touch_mode &&
!id->over &&
!id->dragging)
{
if (gtk_revealer_get_reveal_child (GTK_REVEALER (id->rv)))
gtk_revealer_set_reveal_child (GTK_REVEALER (id->rv), FALSE);
}
return G_SOURCE_CONTINUE;
}
static void
value_changed (GtkAdjustment *adj, GtkWidget *sb)
{
IndicatorData *id = get_indicator_data (sb);
if (id->touch_mode &&
!gtk_revealer_get_reveal_child (GTK_REVEALER (id->rv)))
gtk_revealer_set_reveal_child (GTK_REVEALER (id->rv), TRUE);
id->last_scroll_time = g_get_monotonic_time ();
}
static gboolean
enter_notify (GtkWidget *sb, GdkEventCrossing *event)
{
GtkStyleContext *context = gtk_widget_get_style_context (sb);
IndicatorData *id = get_indicator_data (sb);
gtk_style_context_add_class (context, "locked");
gtk_widget_queue_resize (sb);
id->over = TRUE;
return G_SOURCE_CONTINUE;
}
static gboolean
leave_notify (GtkWidget *sb, GdkEventCrossing *event)
{
GtkStyleContext *context = gtk_widget_get_style_context (sb);
IndicatorData *id = get_indicator_data (sb);
gtk_style_context_remove_class (context, "locked");
gtk_widget_queue_resize (sb);
id->over = FALSE;
return G_SOURCE_CONTINUE;
}
static void
style_changed (GtkStyleContext *context, GtkWidget *sb)
{
IndicatorData *id = get_indicator_data (sb);
if (gtk_style_context_has_class (context, "dragging"))
id->dragging = TRUE;
else
id->dragging = FALSE;
}
static const gchar *
input_source (GdkInputSource source)
{
switch (source)
{
case GDK_SOURCE_MOUSE: return "mouse";
case GDK_SOURCE_PEN: return "pen";
case GDK_SOURCE_ERASER: return "eraser";
case GDK_SOURCE_CURSOR: return "cursor";
case GDK_SOURCE_KEYBOARD: return "keyboard";
case GDK_SOURCE_TOUCHSCREEN: return "touchscreen";
case GDK_SOURCE_TOUCHPAD: return "touchpad";
default: return "unknown";
}
}
static void
list_devices (GdkDeviceManager *dm)
{
GList *devices, *l;
GList *slaves, *s;
GdkDevice *device;
devices = gdk_device_manager_list_devices (dm, GDK_DEVICE_TYPE_MASTER);
for (l = devices; l; l = l->next)
{
device = l->data;
g_print ("%s%s\n",
gdk_device_get_name (device),
gdk_device_get_has_cursor (device) ? ", has cursor" : "");
slaves = gdk_device_list_slave_devices (device);
for (s = slaves; s; s = s->next)
{
device = s->data;
g_print (" ↳ %s, %s\n",
gdk_device_get_name (device),
input_source (gdk_device_get_source (device)));
}
g_list_free (slaves);
}
g_list_free (devices);
}
static gboolean
has_mouse (GdkDeviceManager *dm)
{
GdkDevice *cp;
GList *slaves, *s;
GdkDevice *device;
gboolean found;
found = FALSE;
cp = gdk_device_manager_get_client_pointer (dm);
slaves = gdk_device_list_slave_devices (cp);
for (s = slaves; s; s = s->next)
{
device = s->data;
if (gdk_device_get_source (device) != GDK_SOURCE_MOUSE)
continue;
if (strstr (gdk_device_get_name (device), "XTEST"))
continue;
if (strstr (gdk_device_get_name (device), "TrackPoint"))
continue;
if (g_object_get_data (G_OBJECT (device), "removed"))
continue;
found = TRUE;
break;
}
g_list_free (slaves);
return found;
}
static void
update_touch_mode (IndicatorData *id, gboolean touch_mode)
{
id->touch_mode = touch_mode;
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (id->sw),
GTK_POLICY_NEVER,
id->touch_mode ? GTK_POLICY_EXTERNAL : GTK_POLICY_AUTOMATIC);
g_print ("touch mode now %s\n", id->touch_mode ? "ON" : "OFF");
}
static void
device_added (GdkDeviceManager *dm, GdkDevice *device, IndicatorData *id)
{
if (id->autodetect)
update_touch_mode (id, !has_mouse (dm));
}
static void
device_removed (GdkDeviceManager *dm, GdkDevice *device, IndicatorData *id)
{
if (id->autodetect)
{
/* We need to work around the fact that ::device-removed is emitted
* before the device is removed from the list.
*/
g_object_set_data (G_OBJECT (device), "removed", GINT_TO_POINTER (1));
update_touch_mode (id, !has_mouse (dm));
}
}
static void
mode_changed (GtkComboBox *combo, IndicatorData *id)
{
GdkDeviceManager *dm;
gint active = gtk_combo_box_get_active (combo);
dm = gdk_display_get_device_manager (gdk_display_get_default ());
if (active == 0)
{
id->autodetect = TRUE;
update_touch_mode (id, !has_mouse (dm));
}
else if (active == 1)
{
id->autodetect = FALSE;
update_touch_mode (id, FALSE);
}
else
{
id->autodetect = FALSE;
update_touch_mode (id, TRUE);
}
}
static gchar *
get_content (void)
{
GString *s;
gint i;
s = g_string_new ("");
for (i = 1; i <= 150; i++)
g_string_append_printf (s, "Line %d\n", i);
return g_string_free (s, FALSE);
}
static const gchar data[] =
".scrollbar.overlay-indicator.dragging,"
".scrollbar.overlay-indicator.locked {"
" -GtkRange-slider-width: 15;"
"}"
".scrollbar.overlay-indicator.dragging.trough,"
".scrollbar.overlay-indicator.locked.trough {"
" background-color: alpha(black,0.1);"
"}"
".scrollbar.overlay-indicator {"
" -GtkRange-slider-width: 10;"
"}"
".scrollbar.overlay-indicator.trough {"
" background-color: transparent;"
"}";
int
main (int argc, char *argv[])
{
GtkWidget *window;
gchar *content;
GtkWidget *box;
GtkWidget *sw;
GtkWidget *tv;
GtkWidget *ov;
GtkWidget *rv;
GtkWidget *sb;
GtkWidget *sb2;
GtkWidget *combo;
GtkAdjustment *adj;
GtkCssProvider *provider;
IndicatorData *id;
GdkDeviceManager *dm;
gtk_init (&argc, &argv);
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider, data, -1, NULL);
gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
g_signal_connect (window, "delete-event", G_CALLBACK (gtk_main_quit), NULL);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 20);
gtk_container_add (GTK_CONTAINER (window), box);
ov = gtk_overlay_new ();
gtk_box_pack_start (GTK_BOX (box), ov, TRUE, TRUE, 0);
sw = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
GTK_POLICY_NEVER,
GTK_POLICY_EXTERNAL);
gtk_container_add (GTK_CONTAINER (ov), sw);
content = get_content ();
tv = gtk_text_view_new ();
gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (tv), GTK_WRAP_WORD);
gtk_container_add (GTK_CONTAINER (sw), tv);
gtk_text_buffer_set_text (gtk_text_view_get_buffer (GTK_TEXT_VIEW (tv)),
content, -1);
g_free (content);
adj = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (tv));
sb = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, adj);
rv = gtk_revealer_new ();
gtk_revealer_set_transition_type (GTK_REVEALER (rv), GTK_REVEALER_TRANSITION_TYPE_CROSSFADE);
gtk_revealer_set_transition_duration (GTK_REVEALER (rv), 750);
gtk_container_add (GTK_CONTAINER (rv), sb);
gtk_overlay_add_overlay (GTK_OVERLAY (ov), rv);
gtk_widget_set_halign (rv, GTK_ALIGN_END);
gtk_widget_set_valign (rv, GTK_ALIGN_FILL);
id = get_indicator_data (sb);
id->sw = sw;
id->rv = rv;
gtk_style_context_add_class (gtk_widget_get_style_context (sb), "overlay-indicator");
g_signal_connect (sb, "enter-notify-event", G_CALLBACK (enter_notify), NULL);
g_signal_connect (sb, "leave-notify-event", G_CALLBACK (leave_notify), NULL);
g_signal_connect (gtk_widget_get_style_context (sb), "changed", G_CALLBACK (style_changed), sb);
g_signal_connect (adj, "value-changed", G_CALLBACK (value_changed), sb);
g_timeout_add (500, conceil_scrollbar, sb);
combo = gtk_combo_box_text_new ();
gtk_widget_set_valign (combo, GTK_ALIGN_START);
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Autodetect");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Mouse mode");
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "Touch mode");
g_signal_connect (combo, "changed", G_CALLBACK (mode_changed), id);
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), 0);
gtk_container_add (GTK_CONTAINER (box), combo);
sb2 = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, adj);
gtk_container_add (GTK_CONTAINER (box), sb2);
gtk_widget_show_all (window);
dm = gdk_display_get_device_manager (gdk_display_get_default ());
list_devices (dm);
g_signal_connect (dm, "device-added", G_CALLBACK (device_added), id);
g_signal_connect (dm, "device-removed", G_CALLBACK (device_removed), id);
gtk_main ();
return 0;
}
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