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zoom: add GtkAdjustment control of zoom manager

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This commit is contained in:
Christian Hergert
2019-06-24 20:17:21 -07:00
parent 8f12ef3c09
commit a40564cdda
1 changed files with 77 additions and 2 deletions
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79
src/libsysprof-ui/sysprof-zoom-manager.c
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@ -24,6 +24,7 @@
#include <glib/gi18n.h>
#include <gio/gio.h>
#include <math.h>
#include "sysprof-zoom-manager.h"
@ -34,6 +35,7 @@ struct _SysprofZoomManager
{
GObject parent_instance;
GtkAdjustment *adjustment;
GSimpleActionGroup *actions;
gdouble min_zoom;
@ -107,6 +109,38 @@ sysprof_zoom_manager_zoom_action (GSimpleAction *action,
sysprof_zoom_manager_set_zoom (self, g_variant_get_double (param));
}
static void
sysprof_zoom_manager_value_changed_cb (SysprofZoomManager *self,
GtkAdjustment *adjustment)
{
gdouble value;
g_assert (SYSPROF_IS_ZOOM_MANAGER (self));
g_assert (GTK_IS_ADJUSTMENT (adjustment));
value = gtk_adjustment_get_value (adjustment);
if (value == 0.0)
value = 1.0;
else if (value > 0.0)
value = (value + 1.0) * (value + 1.0);
else
value = 1.0 / ABS (value);
sysprof_zoom_manager_set_zoom (self, value);
}
static void
sysprof_zoom_manager_finalize (GObject *object)
{
SysprofZoomManager *self = (SysprofZoomManager *)object;
g_clear_object (&self->actions);
g_clear_object (&self->adjustment);
G_OBJECT_CLASS (sysprof_zoom_manager_parent_class)->finalize (object);
}
static void
sysprof_zoom_manager_get_property (GObject *object,
guint prop_id,
@ -178,6 +212,7 @@ sysprof_zoom_manager_class_init (SysprofZoomManagerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = sysprof_zoom_manager_finalize;
object_class->get_property = sysprof_zoom_manager_get_property;
object_class->set_property = sysprof_zoom_manager_set_property;
@ -241,10 +276,18 @@ sysprof_zoom_manager_init (SysprofZoomManager *self)
};
GAction *action;
self->min_zoom = 0.0;
self->max_zoom = 0.0;
self->min_zoom = 0.00001;
self->max_zoom = 10000.0;
self->zoom = 1.0;
self->adjustment = g_object_ref_sink (gtk_adjustment_new (0, -10, 10, 1, 3, 0));
g_signal_connect_object (self->adjustment,
"value-changed",
G_CALLBACK (sysprof_zoom_manager_value_changed_cb),
self,
G_CONNECT_SWAPPED);
self->actions = g_simple_action_group_new ();
g_action_map_add_action_entries (G_ACTION_MAP (self->actions),
entries,
@ -414,6 +457,7 @@ sysprof_zoom_manager_set_zoom (SysprofZoomManager *self,
if (zoom != self->zoom)
{
g_autoptr(GVariant) state = NULL;
gdouble adj;
self->zoom = zoom;
state = g_variant_take_ref (g_variant_new_double (zoom));
@ -422,6 +466,20 @@ sysprof_zoom_manager_set_zoom (SysprofZoomManager *self,
"state", state,
NULL);
/* Convert to form used by adjustment */
if (zoom == 1.0)
adj = 0.0;
else if (zoom > 1.0)
adj = sqrt (zoom) - 1.0;
else
adj = -1 / zoom;
g_signal_handlers_block_matched (self->adjustment, G_SIGNAL_MATCH_FUNC, 0, 0, NULL,
sysprof_zoom_manager_value_changed_cb, self);
gtk_adjustment_set_value (self->adjustment, adj);
g_signal_handlers_unblock_matched (self->adjustment, G_SIGNAL_MATCH_FUNC, 0, 0, NULL,
sysprof_zoom_manager_value_changed_cb, self);
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_ZOOM]);
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_CAN_ZOOM_IN]);
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_CAN_ZOOM_OUT]);
@ -584,3 +642,20 @@ _sysprof_format_duration (gint64 duration)
negative ? "-" : "",
(duration / (gdouble)NSEC_PER_SEC));
}
/**
* sysprof_zoom_manager_get_adjustment:
*
* Gets an adjustment for zoom controls.
*
* Returns: (transfer none): a #GtkAdjustment
*
* Since: 3.34
*/
GtkAdjustment *
sysprof_zoom_manager_get_adjustment (SysprofZoomManager *self)
{
g_return_val_if_fail (SYSPROF_IS_ZOOM_MANAGER (self), NULL);
return self->adjustment;
}