/* Copyright (C) 2016 Benoit Touchette
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version
* 2.1 of the License.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see .
*/
/* Portions of this code Copyright (C) 1997 David Mosberger and
* Copyright (C) 1997 - 2000 GTK+ Team.
*/
#include
#include
#include
#include
#include
#include "gtk3curve.h"
#include "utils-gtk.h"
#ifdef DEBUG
#define DEBUG_INFO g_print
#define DEBUG_ERROR g_printerr
#else
#define DEBUG_INFO(...)
#define DEBUG_ERROR(...)
#endif
static guint curve_type_changed_signal = 0;
static gint Gtk3Curve_private_offset = 0;
static GtkDrawingAreaClass *gtk3_curve_parent_class = NULL;
#define _gtk3_marshal_VOID__VOID g_cclosure_marshal_VOID__VOID
#define GTK3_PARAM_READABLE G_PARAM_READABLE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB
#define GTK3_PARAM_WRITABLE G_PARAM_WRITABLE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB
#define GTK3_PARAM_READWRITE G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB
#define RADIUS 3 /* radius of the control points */
#define MIN_DISTANCE 8 /* min distance between control points */
#define GRAPH_MASK (GDK_EXPOSURE_MASK | \
GDK_POINTER_MOTION_MASK | \
GDK_POINTER_MOTION_HINT_MASK | \
GDK_ENTER_NOTIFY_MASK | \
GDK_LEAVE_NOTIFY_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON1_MOTION_MASK)
struct _Gtk3CurvePrivate
{
GdkWindow *event_window;
GList *children;
gint cursor_type;
gfloat min_x;
gfloat max_x;
gfloat min_y;
gfloat max_y;
gboolean use_bg_theme;
Gtk3CurveColor background;
Gtk3CurveColor cpoint;
Gtk3CurveColor grid;
Gtk3CurveColor curve;
Gtk3CurveType curve_type;
gint width;
gint height;
gint grab_point;
gint last;
Gtk3CurveGridSize grid_size;
Gtk3CurveData curve_data;
guint state : 1;
guint in_curve : 1;
};
enum
{
PROP_0,
PROP_CURVE_TYPE,
PROP_MIN_X,
PROP_MAX_X,
PROP_MIN_Y,
PROP_MAX_Y
};
static void gtk3_curve_realize (GtkWidget *widget);
static void gtk3_curve_unrealize (GtkWidget *widget);
static void gtk3_curve_style_updated (GtkWidget *widget);
static void gtk3_curve_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk3_curve_configure (Gtk3Curve *curve);
static gboolean gtk3_curve_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk3_curve_map (GtkWidget *widget);
static void gtk3_curve_unmap (GtkWidget *widget);
static gboolean gtk3_curve_enter (GtkWidget *widget,
GdkEventCrossing *event);
static gboolean gtk3_curve_leave (GtkWidget *widget,
GdkEventCrossing *event);
static gboolean gtk3_curve_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk3_curve_button_release (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk3_curve_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static void gtk3_curve_screen_changed (GtkWidget *widget,
GdkScreen *prev_screen);
static void gtk3_curve_style_updated (GtkWidget *widget);
static void gtk3_curve_finalize (GObject *object);
static void gtk3_curve_dispose (GObject *object);
static void gtk3_curve_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk3_curve_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk3_curve_size_graph (Gtk3Curve *curve);
static void gtk3_curve_create_layouts (GtkWidget *widget);
static void gtk3_curve_reset_vector (GtkWidget *widget);
static void gtk3_curve_interpolate (GtkWidget *widget,
gint width,
gint height);
static int project (gfloat value,
gfloat min,
gfloat max,
int norm);
static gfloat unproject (gint value,
gfloat min,
gfloat max,
int norm);
static void spline_solve (int n,
gfloat x[],
gfloat y[],
gfloat y2[]);
static gfloat spline_eval (int n,
gfloat x[],
gfloat y[],
gfloat y2[],
gfloat val);
static void gtk3_curve_draw_line (cairo_t *cr,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2);
static void gtk3_curve_class_init (Gtk3CurveClass *klass);
static void gtk3_curve_init (Gtk3Curve *self);
static void gtk3_curve_get_cursor_coord (GtkWidget *widget,
gint *tx,
gint *ty);
static inline gpointer
gtk3_curve_get_instance_private (Gtk3Curve *self)
{
return (G_STRUCT_MEMBER_P (self, Gtk3Curve_private_offset));
}
static void gtk_gadget_class_intern_init (gpointer klass)
{
g_type_class_adjust_private_offset (klass, &Gtk3Curve_private_offset);
gtk3_curve_parent_class = g_type_class_peek_parent (klass);
// gtk3_curve_class_init ((Gtk3CurveClass*) klass);
}
GType
gtk3_curve_get_type (void)
{
static GType curve_type = 0;
if (G_UNLIKELY (curve_type == 0))
{
const GTypeInfo curve_info =
{
sizeof (Gtk3CurveClass),
NULL, // base_init
NULL, // base_finalize
(GClassInitFunc) gtk3_curve_class_init,
NULL, // class_finalize
NULL, // class_data
sizeof (Gtk3Curve),
0, // n_preallocs
(GInstanceInitFunc) gtk3_curve_init,
};
curve_type = g_type_register_static (GTK_TYPE_WIDGET, "Gtk3Curve",
&curve_info, 0);
Gtk3Curve_private_offset =
g_type_add_instance_private (curve_type, sizeof (Gtk3CurvePrivate));
}
return curve_type;
}
GType
gtk3_curve_type_get_type (void)
{
static GType etype = 0;
if (G_UNLIKELY(etype == 0))
{
static const GEnumValue values[] =
{
{ GTK3_CURVE_TYPE_LINEAR, "GTK3_CURVE_TYPE_LINEAR", "linear" },
{ GTK3_CURVE_TYPE_SPLINE, "GTK3_CURVE_TYPE_SPLINE", "spline" },
{ GTK3_CURVE_TYPE_FREE, "GTK3_CURVE_TYPE_FREE", "free" },
{ 0, NULL, NULL }
};
etype = g_enum_register_static (g_intern_static_string ("Gtk3CurveType"),
values);
}
return etype;
}
static void
gtk3_curve_class_init (Gtk3CurveClass* klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
DEBUG_INFO("class_init [S]\n");
gtk_gadget_class_intern_init (klass);
widget_class = GTK_WIDGET_CLASS (klass);
widget_class->realize = gtk3_curve_realize;
widget_class->unrealize = gtk3_curve_unrealize;
widget_class->draw = gtk3_curve_draw;
widget_class->motion_notify_event = gtk3_curve_motion_notify;
widget_class->map = gtk3_curve_map;
widget_class->unmap = gtk3_curve_unmap;
widget_class->enter_notify_event = gtk3_curve_enter;
widget_class->leave_notify_event = gtk3_curve_leave;
widget_class->button_press_event = gtk3_curve_button_press;
widget_class->button_release_event = gtk3_curve_button_release;
widget_class->size_allocate = gtk3_curve_size_allocate;
widget_class->screen_changed = gtk3_curve_screen_changed;
widget_class->style_updated = gtk3_curve_style_updated;
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_DRAWING_AREA);
gobject_class = G_OBJECT_CLASS (klass);
g_type_class_adjust_private_offset (klass, &Gtk3Curve_private_offset);
gtk3_curve_parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gtk3_curve_finalize;
gobject_class->dispose = gtk3_curve_dispose;
gobject_class->set_property = gtk3_curve_set_property;
gobject_class->get_property = gtk3_curve_get_property;
g_object_class_install_property (gobject_class,
PROP_CURVE_TYPE,
g_param_spec_enum ("curve-type",
"Curve type",
"Is this curve linear, spline interpolated, or free-form",
GTK3_TYPE_CURVE_TYPE,
GTK3_CURVE_TYPE_SPLINE,
GTK3_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_MIN_X,
g_param_spec_float ("min-x",
"Minimum X",
"Minimum possible value for X",
-G_MAXFLOAT,
G_MAXFLOAT,
0.0,
GTK3_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_MAX_X,
g_param_spec_float ("max-x",
"Maximum X",
"Maximum possible X value",
-G_MAXFLOAT,
G_MAXFLOAT,
1.0,
GTK3_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_MIN_Y,
g_param_spec_float ("min-y",
"Minimum Y",
"Minimum possible value for Y",
-G_MAXFLOAT,
G_MAXFLOAT,
0.0,
GTK3_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_MAX_Y,
g_param_spec_float ("max-y",
"Maximum Y",
"Maximum possible value for Y",
-G_MAXFLOAT,
G_MAXFLOAT,
1.0,
GTK3_PARAM_READWRITE));
curve_type_changed_signal =
g_signal_new ("curve-type-changed",
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (Gtk3CurveClass, curve_type_changed),
NULL, NULL,
_gtk3_marshal_VOID__VOID,
G_TYPE_NONE, 0);
DEBUG_INFO("class_init [E]\n");
}
static void
gtk3_curve_init (Gtk3Curve* self)
{
Gtk3CurvePrivate *priv;
DEBUG_INFO("init [S]\n");
gtk_widget_set_has_window(GTK_WIDGET(self), TRUE);
gtk_widget_set_redraw_on_allocate(GTK_WIDGET(self), TRUE);
self->priv = gtk3_curve_get_instance_private (self);
priv = self->priv;
/* Curve Data Points */
priv->curve_data.description = NULL;
priv->curve_data.n_points = 0;
priv->curve_data.d_point = NULL;
priv->curve_data.n_cpoints = 0;
priv->curve_data.d_cpoints = NULL;
priv->curve_data.curve_type = GTK3_CURVE_TYPE_SPLINE;
/* Misc */
priv->use_bg_theme = TRUE;
priv->cursor_type = GDK_TOP_LEFT_ARROW;
priv->grid_size = GTK3_CURVE_GRID_LARGE;
priv->height = 0;
priv->grab_point = -1;
/* Min & Max range */
priv->min_x = 0.0;
priv->max_x = 1.0;
priv->min_y = 0.0;
priv->max_y = 1.0;
/* Default Colors */
gtk3_curve_set_color_background_rgba (GTK_WIDGET(self), 1.0, 1.0, 1.0, 1.0);
gtk3_curve_set_color_curve_rgba (GTK_WIDGET(self), 0.0, 0.0, 0.0, 1.0);
gtk3_curve_set_color_grid_rgba (GTK_WIDGET(self), 0.0, 0.0, 0.0, 1.0);
gtk3_curve_set_color_cpoint_rgba (GTK_WIDGET(self), 0.2, 0.2, 0.2, 1.0);
gtk3_curve_size_graph (self);
DEBUG_INFO("init [E]\n");
}
GtkWidget *
gtk3_curve_new()
{
return g_object_new (GTK3_TYPE_CURVE, NULL);
}
static void
gtk3_curve_style_updated (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk3_curve_parent_class)->style_updated (widget);
DEBUG_INFO("style_updated [S]\n");
if (gtk_widget_get_realized (widget) &&
gtk_widget_get_has_window (widget))
{
gtk_widget_queue_draw (widget);
}
DEBUG_INFO("style_updated [E]\n");
}
static void
gtk3_curve_realize (GtkWidget *widget)
{
GtkAllocation allocation;
GdkWindow *parent_window;
GdkWindowAttr attributes;
gint attributes_mask;
Gtk3CurvePrivate *priv;
priv = GTK3_CURVE (widget)->priv;
DEBUG_INFO("realize [S]\n");
if (!gtk_widget_get_has_window (widget))
{
GTK_WIDGET_CLASS (gtk3_curve_parent_class)->realize (widget);
}
else
{
gtk_widget_set_realized (widget, TRUE);
parent_window = gtk_widget_get_parent_window (widget);
gtk_widget_set_window (widget, parent_window);
g_object_ref (parent_window);
gtk_widget_get_allocation (widget, &allocation);
DEBUG_INFO("allocation [%d,%d] [%dx%d]\n",
allocation.x,
allocation.y,
allocation.width,
allocation.height);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.event_mask = gtk_widget_get_events (widget) |
GRAPH_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
priv->event_window = gdk_window_new (parent_window,
&attributes,
attributes_mask);
gtk_widget_register_window (widget, priv->event_window);
gtk_widget_set_window (widget, priv->event_window);
}
gtk3_curve_configure (GTK3_CURVE (widget));
DEBUG_INFO("realize [E]\n");
}
static void
gtk3_curve_unrealize (GtkWidget *widget)
{
Gtk3CurvePrivate *priv = GTK3_CURVE (widget)->priv;
DEBUG_INFO("unrealize [S]\n");
if (priv->event_window != NULL)
{
DEBUG_INFO("unregister/destroy\n");
gtk_widget_unregister_window (widget, priv->event_window);
gdk_window_destroy (priv->event_window);
priv->event_window = NULL;
}
DEBUG_INFO("unrealize [E]\n");
}
static void
gtk3_curve_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
g_return_if_fail (GTK3_IS_CURVE (widget));
g_return_if_fail (allocation != NULL);
DEBUG_INFO("size_allocate [S]\n");
gtk_widget_set_allocation (widget, allocation);
DEBUG_INFO("allocation [%d,%d] [%dx%d]\n",
allocation->x,
allocation->y,
allocation->width,
allocation->height);
if (gtk_widget_get_realized (widget))
{
if (gtk_widget_get_has_window (widget))
{
gdk_window_move_resize (gtk_widget_get_window (widget),
allocation->x, allocation->y,
allocation->width, allocation->height);
}
gtk3_curve_configure (GTK3_CURVE (widget));
}
DEBUG_INFO("size_allocate [E]\n");
}
static void
gtk3_curve_configure (Gtk3Curve *curve)
{
GtkAllocation allocation;
GtkWidget *widget;
GdkEvent *event = gdk_event_new (GDK_CONFIGURE);
DEBUG_INFO("configure [S]\n");
widget = GTK_WIDGET (curve);
gtk_widget_get_allocation (widget, &allocation);
DEBUG_INFO("allocation [%d,%d] [%dx%d]\n",
allocation.x,
allocation.y,
allocation.width,
allocation.height);
event->configure.window = g_object_ref (gtk_widget_get_window (widget));
event->configure.send_event = TRUE;
event->configure.x = allocation.x;
event->configure.y = allocation.y;
event->configure.width = allocation.width;
event->configure.height = allocation.height;
gtk_widget_event (widget, event);
gtk_widget_queue_draw (widget);
gdk_event_free (event);
DEBUG_INFO("configure [E]\n");
}
static void gtk3_curve_draw_line (cairo_t *cr,
gdouble x1, gdouble y1,
gdouble x2, gdouble y2)
{
cairo_move_to (cr, x1, y1);
cairo_line_to (cr, x2, y2);
cairo_stroke (cr);
}
static gboolean
gtk3_curve_draw (GtkWidget *widget,
cairo_t *cr)
{
Gtk3CurvePrivate *priv;
GtkStyleContext *style_context;
GtkStyle *style;
GdkRGBA color;
gint last_x, last_y;
gint i;
GtkAllocation allocation;
Gtk3Curve *curve;
gfloat grid;
curve = GTK3_CURVE (widget);
priv = curve->priv;
DEBUG_INFO("draw [S]\n");
if (!cr)
{
DEBUG_ERROR("cairo == null\n");
return TRUE;
}
gtk_widget_get_allocation (widget, &allocation);
DEBUG_INFO("%d x %d\n", allocation.width, allocation.height);
if (priv->height != allocation.width ||
priv->curve_data.n_points != allocation.height)
{
gtk3_curve_interpolate (widget,
allocation.width - RADIUS * 2,
allocation.height - RADIUS * 2);
}
if (priv->use_bg_theme)
{
style_context = gtk_widget_get_style_context(GTK_WIDGET (curve));
gtk_render_background(style_context, cr,
0, 0,
allocation.width + RADIUS * 2,
allocation.height + RADIUS * 2);
/*
vj_gtk_context_get_color (style_context,
"background-color",
gtk_style_context_get_state (style_context),
&color);
*/
gtk_style_context_get_color (style_context,
gtk_style_context_get_state (style_context),
&color);
gdk_cairo_set_source_rgba (cr, &color);
}
else
{
cairo_set_source_rgba (cr,
priv->background.red,
priv->background.green,
priv->background.blue,
priv->background.alpha);
}
cairo_paint(cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
switch (priv->grid_size)
{
default:
case GTK3_CURVE_GRID_MICRO:
grid = 10.0;
break;
case GTK3_CURVE_GRID_SMALL:
grid = 8.0;
break;
case GTK3_CURVE_GRID_MEDIUM:
grid = 6.0;
break;
case GTK3_CURVE_GRID_LARGE:
grid = 4.0;
case GTK3_CURVE_GRID_XLARGE:
grid = 2.0;
}
gfloat wm = allocation.width - (RADIUS * 2);
gfloat hm = allocation.height - (RADIUS * 2);
/* Draw grid */
for (i = 0; i < (int)grid+1; i++)
{
cairo_set_line_width (cr, 0.5);
cairo_set_source_rgba (cr,
priv->grid.red,
priv->grid.green,
priv->grid.blue,
priv->grid.alpha);
gdouble x1 = RADIUS;
gdouble y1 = i * (hm / grid) + RADIUS;
gdouble x2 = wm + RADIUS;
gdouble y2 = i * (hm / grid) + RADIUS;
gtk3_curve_draw_line (cr, x1, y1, x2, y2);
x1 = i * (wm / grid) + RADIUS;
y1 = RADIUS;
x2 = i * (wm / grid) + RADIUS;
y2 = hm + RADIUS;
gtk3_curve_draw_line (cr, x1, y1, x2, y2);
}
/* Draw a curve or line or set of lines */
for (int i=0; icurve_data.n_points; i++)
{
gdouble x = priv->curve_data.d_point[i].x;
gdouble y = priv->curve_data.d_point[i].y;
if (i > 0)
{
cairo_set_line_width (cr, 0.5);
cairo_set_source_rgba (cr,
priv->curve.red,
priv->curve.green,
priv->curve.blue,
priv->curve.alpha);
gtk3_curve_draw_line (cr, last_x, last_y, x, y);
}
last_x = x;
last_y = y;
}
if (priv->curve_data.curve_type != GTK3_CURVE_TYPE_FREE)
for (i = 0; i < priv->curve_data.n_cpoints; ++i)
{
gdouble x, y;
if (priv->curve_data.d_cpoints[i].x < priv->min_x)
continue;
x = project (priv->curve_data.d_cpoints[i].x,
priv->min_x, priv->max_x,
wm);
y = allocation.height - project (priv->curve_data.d_cpoints[i].y,
priv->min_y,
priv->max_y,
hm);
/* draw a bullet */
cairo_set_source_rgba (cr,
priv->cpoint.red,
priv->cpoint.green,
priv->cpoint.blue,
priv->cpoint.alpha);
cairo_arc(cr,
x,
y,
RADIUS * 1.5,
0,
2 * M_PI);
cairo_fill (cr);
}
DEBUG_INFO("draw [E]\n");
return FALSE;
}
static void
gtk3_curve_map (GtkWidget *widget)
{
Gtk3CurvePrivate *priv = GTK3_CURVE (widget)->priv;
GTK_WIDGET_CLASS (gtk3_curve_parent_class)->map (widget);
DEBUG_INFO("map [S]\n");
if (priv->event_window)
{
DEBUG_INFO("show\n");
gdk_window_show (priv->event_window);
}
DEBUG_INFO("map [E]\n");
}
static void
gtk3_curve_unmap (GtkWidget *widget)
{
Gtk3CurvePrivate *priv = GTK3_CURVE (widget)->priv;
DEBUG_INFO("unmap [S]\n");
if (priv->event_window)
{
DEBUG_INFO("hide\n");
gdk_window_hide (priv->event_window);
}
GTK_WIDGET_CLASS (gtk3_curve_parent_class)->unmap (widget);
DEBUG_INFO("unmap [E]\n");
}
static gboolean
gtk3_curve_enter (GtkWidget *widget,
GdkEventCrossing *event)
{
Gtk3CurvePrivate *priv = GTK3_CURVE (widget)->priv;
DEBUG_INFO("enter [S]\n");
if (event->window == priv->event_window)
{
priv->in_curve = TRUE;
}
DEBUG_INFO("enter [E]\n");
return FALSE;
}
static gboolean
gtk3_curve_leave (GtkWidget *widget,
GdkEventCrossing *event)
{
Gtk3CurvePrivate *priv = GTK3_CURVE (widget)->priv;
DEBUG_INFO("leave [S]\n");
if (event->window == priv->event_window)
{
priv->in_curve = FALSE;
}
DEBUG_INFO("leave [E]\n");
return FALSE;
}
static
void gtk3_curve_get_cursor_coord(GtkWidget *widget, gint *tx, gint *ty)
{
GdkSeat *user_seat;
GdkDevice *device_pointer;
/* get the pointer position */
user_seat = gdk_display_get_default_seat (gdk_display_get_default ());
device_pointer = gdk_seat_get_pointer (user_seat);
gdk_window_get_device_position (gtk_widget_get_window (widget),
device_pointer,
tx, ty, NULL);
}
static gboolean
gtk3_curve_button_press (GtkWidget *widget,
GdkEventButton *event)
{
Gtk3CurvePrivate *priv = GTK3_CURVE (widget)->priv;
GtkAllocation allocation;
gint cx, x, y, width, height, i;
gint closest_point = 0;
gfloat min_x;
gint tx, ty;
guint distance;
DEBUG_INFO("button press [S]\n");
gtk_grab_add (widget);
gtk_widget_get_allocation (widget, &allocation);
width = allocation.width - RADIUS * 2;
height = allocation.height - RADIUS * 2;
if ((width < 0) || (height < 0))
return FALSE;
/* get the pointer position */
gtk3_curve_get_cursor_coord (widget, &tx, &ty);
x = CLAMP ((tx - RADIUS), 0, width - 1);
y = CLAMP ((ty - RADIUS), 0, height - 1);
DEBUG_INFO("press : xy[%dx%d] txy[%dx%d]\n",
x, y,
tx, ty);
min_x = priv->min_x;
distance = ~0U;
for (i = 0; i < priv->curve_data.n_cpoints; ++i)
{
cx = project (priv->curve_data.d_cpoints[i].x, min_x, priv->max_x, width);
if ((guint) abs (x - cx) < distance)
{
distance = abs (x - cx);
closest_point = i;
}
}
switch (priv->curve_data.curve_type)
{
default:
case GTK3_CURVE_TYPE_LINEAR:
case GTK3_CURVE_TYPE_SPLINE:
if (distance > MIN_DISTANCE)
{
/* insert a new control point */
if (priv->curve_data.n_cpoints > 0)
{
cx = project (priv->curve_data.d_cpoints[closest_point].x, min_x,
priv->max_x, width);
if (x > cx)
++closest_point;
}
++priv->curve_data.n_cpoints;
priv->curve_data.d_cpoints =
g_realloc (priv->curve_data.d_cpoints,
priv->curve_data.n_cpoints * sizeof (*priv->curve_data.d_cpoints));
for (i = priv->curve_data.n_cpoints - 1; i > closest_point; --i)
memcpy (priv->curve_data.d_cpoints + i, priv->curve_data.d_cpoints + i - 1,
sizeof (*priv->curve_data.d_cpoints));
}
priv->grab_point = closest_point;
priv->curve_data.d_cpoints[priv->grab_point].x =
unproject (x, min_x, priv->max_x, width);
priv->curve_data.d_cpoints[priv->grab_point].y =
unproject (height - y, priv->min_y, priv->max_y, height);
gtk3_curve_interpolate (widget, width, height);
break;
case GTK3_CURVE_TYPE_FREE:
priv->curve_data.d_point[x].x = RADIUS + x;
priv->curve_data.d_point[x].y = RADIUS + y;
priv->grab_point = x;
priv->last = y;
break;
}
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
DEBUG_INFO("button press [E]\n");
return FALSE;
}
static gboolean
gtk3_curve_button_release (GtkWidget *widget,
GdkEventButton *event)
{
Gtk3CurvePrivate *priv = GTK3_CURVE (widget)->priv;
GtkAllocation allocation;
// GdkCursorType new_type = priv->cursor_type;
gint src, dst, cx, x, width, height, i;
gfloat min_x;
guint distance;
gint tx, ty;
DEBUG_INFO("button release [S]\n");
gtk_grab_remove (widget);
gtk_widget_get_allocation (widget, &allocation);
width = allocation.width - RADIUS * 2;
height = allocation.height - RADIUS * 2;
if ((width < 0) || (height < 0))
return FALSE;
/* get the pointer position */
gtk3_curve_get_cursor_coord (widget, &tx, &ty);
x = CLAMP ((tx - RADIUS), 0, width - 1);
// y = CLAMP ((ty - RADIUS), 0, height - 1);
DEBUG_INFO("release : xy[%dx%d] txy[%dx%d]\n",
x, 0,
tx, ty);
min_x = priv->min_x;
distance = ~0U;
for (i = 0; i < priv->curve_data.n_cpoints; ++i)
{
cx = project (priv->curve_data.d_cpoints[i].x,
min_x, priv->max_x, width);
if ((guint) abs (x - cx) < distance)
{
distance = abs (x - cx);
}
}
/* delete inactive points: */
if (priv->curve_data.curve_type != GTK3_CURVE_TYPE_FREE)
{
for (src = dst = 0; src < priv->curve_data.n_cpoints; ++src)
{
if (priv->curve_data.d_cpoints[src].x >= min_x)
{
memcpy (priv->curve_data.d_cpoints + dst,
priv->curve_data.d_cpoints + src,
sizeof (*priv->curve_data.d_cpoints));
++dst;
}
}
if (dst < src)
{
priv->curve_data.n_cpoints -= (src - dst);
if (priv->curve_data.n_cpoints <= 0)
{
priv->curve_data.n_cpoints = 1;
priv->curve_data.d_cpoints[0].x = min_x;
priv->curve_data.d_cpoints[0].y = priv->min_y;
gtk3_curve_interpolate (widget, width, height);
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
priv->curve_data.d_cpoints =
g_realloc (priv->curve_data.d_cpoints,
priv->curve_data.n_cpoints *
sizeof (*priv->curve_data.d_cpoints));
}
}
// new_type = GDK_FLEUR;
priv->grab_point = -1;
DEBUG_INFO("button release [E]\n");
return FALSE;
}
static gboolean
gtk3_curve_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
Gtk3CurvePrivate *priv = GTK3_CURVE (widget)->priv;
GtkAllocation allocation;
GdkCursorType new_type = priv->cursor_type;
gint i, leftbound, rightbound;
GdkEventMotion *mevent;
gint tx, ty;
gint cx, x, y, width, height;
//gint closest_point = 0;
gfloat rx, ry, min_x;
guint distance;
gint x1, x2, y1, y2;
// gint retval = FALSE;
DEBUG_INFO("motion_notify [S]\n");
mevent = (GdkEventMotion *) event;
gtk_widget_get_allocation (widget, &allocation);
width = allocation.width - RADIUS * 2;
height = allocation.height - RADIUS * 2;
if ((width < 0) || (height < 0))
return FALSE;
/* get the pointer position */
gtk3_curve_get_cursor_coord (widget, &tx, &ty);
x = CLAMP ((tx - RADIUS), 0, width - 1);
y = CLAMP ((ty - RADIUS), 0, height - 1);
DEBUG_INFO("motion : xy[%dx%d] txy[%dx%d]\n",
x, y,
tx, ty);
min_x = priv->min_x;
distance = ~0U;
for (i = 0; i < priv->curve_data.n_cpoints; ++i)
{
cx = project (priv->curve_data.d_cpoints[i].x, min_x, priv->max_x, width);
if ((guint) abs (x - cx) < distance)
{
distance = abs (x - cx);
// closest_point = i;
}
}
switch (priv->curve_data.curve_type)
{
default:
case GTK3_CURVE_TYPE_LINEAR:
case GTK3_CURVE_TYPE_SPLINE:
if (priv->grab_point == -1)
{
/* if no point is grabbed... */
if (distance <= MIN_DISTANCE)
new_type = GDK_FLEUR;
else
new_type = GDK_TCROSS;
}
else
{
/* drag the grabbed point */
new_type = GDK_TCROSS;
leftbound = -MIN_DISTANCE;
if (priv->grab_point > 0)
leftbound = project (priv->curve_data.d_cpoints[priv->grab_point - 1].x,
min_x, priv->max_x, width);
rightbound = width + RADIUS * 2 + MIN_DISTANCE;
if (priv->grab_point + 1 < priv->curve_data.n_cpoints)
rightbound = project (priv->curve_data.d_cpoints[priv->grab_point + 1].x,
min_x, priv->max_x, width);
if (tx <= leftbound || tx >= rightbound
|| ty > height + RADIUS * 2 + MIN_DISTANCE
|| ty < -MIN_DISTANCE)
priv->curve_data.d_cpoints[priv->grab_point].x = min_x - 1.0;
else
{
rx = unproject (x, min_x, priv->max_x, width);
ry = unproject (height - y, priv->min_y, priv->max_y, height);
priv->curve_data.d_cpoints[priv->grab_point].x = rx;
priv->curve_data.d_cpoints[priv->grab_point].y = ry;
}
gtk3_curve_interpolate (widget, width, height);
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
break;
case GTK3_CURVE_TYPE_FREE:
if (priv->grab_point != -1)
{
if (priv->grab_point > x)
{
x1 = x;
x2 = priv->grab_point;
y1 = y;
y2 = priv->last;
}
else
{
x1 = priv->grab_point;
x2 = x;
y1 = priv->last;
y2 = y;
}
if (x2 != x1)
for (i = x1; i <= x2; i++)
{
priv->curve_data.d_point[i].x = RADIUS + i;
priv->curve_data.d_point[i].y = RADIUS +
(y1 + ((y2 - y1) * (i - x1)) / (x2 - x1));
}
else
{
priv->curve_data.d_point[x].x = RADIUS + x;
priv->curve_data.d_point[x].y = RADIUS + y;
}
priv->grab_point = x;
priv->last = y;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
if (mevent->state & GDK_BUTTON1_MASK)
new_type = GDK_TCROSS;
else
new_type = GDK_PENCIL;
break;
}
if (new_type != (GdkCursorType) priv->cursor_type)
{
GdkCursor *cursor;
priv->cursor_type = new_type;
cursor = gdk_cursor_new_for_display (gdk_display_get_default (),
priv->cursor_type);
gdk_window_set_cursor (gtk_widget_get_window (widget), cursor);
g_object_unref (cursor);
}
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
DEBUG_INFO("motion_notify [E]\n");
return TRUE;
}
static void
gtk3_curve_screen_changed (GtkWidget *widget,
GdkScreen *prev_screen)
{
DEBUG_INFO("screen changed [S]\n");
gtk3_curve_create_layouts (widget);
DEBUG_INFO("screen changed [E]\n");
}
static void
gtk3_curve_dispose (GObject *object)
{
G_OBJECT_CLASS (gtk3_curve_parent_class)->dispose (object);
}
static void
gtk3_curve_finalize (GObject *object)
{
Gtk3Curve *curve;
Gtk3CurvePrivate *priv;
g_return_if_fail (GTK3_IS_CURVE (object));
curve = GTK3_CURVE (object);
priv = curve->priv;
if (priv->curve_data.d_point)
g_free (priv->curve_data.d_point);
if (priv->curve_data.d_cpoints)
g_free (priv->curve_data.d_cpoints);
G_OBJECT_CLASS (gtk3_curve_parent_class)->finalize (object);
}
static void
gtk3_curve_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
Gtk3Curve *curve = GTK3_CURVE (object);
GtkWidget *widget = GTK_WIDGET(object);
Gtk3CurvePrivate *priv = curve->priv;
switch (prop_id)
{
case PROP_CURVE_TYPE:
gtk3_curve_set_curve_type (widget, g_value_get_enum (value));
break;
case PROP_MIN_X:
gtk3_curve_set_range (widget, g_value_get_float (value), priv->max_x,
priv->min_y, priv->max_y);
break;
case PROP_MAX_X:
gtk3_curve_set_range (widget, priv->min_x, g_value_get_float (value),
priv->min_y, priv->max_y);
break;
case PROP_MIN_Y:
gtk3_curve_set_range (widget, priv->min_x, priv->max_x,
g_value_get_float (value), priv->max_y);
break;
case PROP_MAX_Y:
gtk3_curve_set_range (widget, priv->min_x, priv->max_x,
priv->min_y, g_value_get_float (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk3_curve_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
Gtk3Curve *curve = GTK3_CURVE (object);
Gtk3CurvePrivate *priv = curve->priv;
switch (prop_id)
{
case PROP_CURVE_TYPE:
g_value_set_enum (value, priv->curve_data.curve_type);
break;
case PROP_MIN_X:
g_value_set_float (value, priv->min_x);
break;
case PROP_MAX_X:
g_value_set_float (value, priv->max_x);
break;
case PROP_MIN_Y:
g_value_set_float (value, priv->min_y);
break;
case PROP_MAX_Y:
g_value_set_float (value, priv->max_y);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk3_curve_size_graph (Gtk3Curve *curve)
{
Gtk3CurvePrivate *priv = curve->priv;
GdkRectangle geom;
gint width, height;
gfloat aspect;
GdkDisplay *gdk_display = gdk_display_get_default ();
GdkMonitor *monitor = gdk_display_get_primary_monitor(gdk_display);
gdk_monitor_get_geometry(monitor, &geom);
width = (priv->max_x - priv->min_x);
height = (priv->max_y - priv->min_y);
aspect = width / (gfloat) height;
if (width > geom.width / 4)
{
width = geom.width / 4;
}
if (height > geom.height / 4)
{
height = geom.height / 4;
}
if (aspect < 1.0)
{
width = height * aspect;
}
else
{
height = width / aspect;
}
DEBUG_INFO("Set requested size to [%dx%d]\n", width, height);
gtk_widget_set_size_request (GTK_WIDGET (curve), width, height);
}
static void
gtk3_curve_create_layouts (GtkWidget *widget)
{
DEBUG_INFO("create pango [S]\n");
DEBUG_INFO("create pango [E]\n");
}
static void
gtk3_curve_reset_vector (GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
gint width, height;
g_free (priv->curve_data.d_cpoints);
priv->curve_data.n_cpoints = 2;
priv->curve_data.d_cpoints = g_malloc (2 * sizeof (priv->curve_data.d_cpoints[0]));
priv->curve_data.d_cpoints[0].x = priv->min_x;
priv->curve_data.d_cpoints[0].y = priv->min_y;
priv->curve_data.d_cpoints[1].x = priv->max_x;
priv->curve_data.d_cpoints[1].y = priv->max_y;
width = gtk_widget_get_allocated_width(widget) - RADIUS * 2;
height = gtk_widget_get_allocated_height(widget) - RADIUS * 2;
if (width < RADIUS * 2) return;
if (height < RADIUS * 2) return;
if (priv->curve_data.curve_type == GTK3_CURVE_TYPE_FREE)
{
priv->curve_data.curve_type = GTK3_CURVE_TYPE_LINEAR;
gtk3_curve_interpolate (widget, width, height);
priv->curve_data.curve_type = GTK3_CURVE_TYPE_FREE;
}
else
gtk3_curve_interpolate (widget, width, height);
DEBUG_INFO("reset vector\n");
if (gtk_widget_is_visible (GTK_WIDGET (curve)))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (GTK_WIDGET (curve));
}
}
static void
gtk3_curve_interpolate (GtkWidget *widget, gint width, gint height)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
gfloat *vector;
int i;
if (width < 0 || height < 0) return;
vector = g_malloc (width * sizeof (vector[0]));
gtk3_curve_get_vector (widget, width, vector);
priv->height = height;
if (priv->curve_data.n_points != width)
{
priv->curve_data.n_points = width;
g_free (priv->curve_data.d_point);
priv->curve_data.d_point = g_malloc (priv->curve_data.n_points * sizeof (priv->curve_data.d_point[0]));
}
for (i = 0; i < width; ++i)
{
priv->curve_data.d_point[i].x = RADIUS + i;
priv->curve_data.d_point[i].y = RADIUS + height
- project (vector[i], priv->min_y, priv->max_y, height);
}
g_free (vector);
}
/* ===================== */
/* =========================== YE OLDE MATH ========================== */
/* ===================== */
/* Solve the tridiagonal equation system that determines the second
derivatives for the interpolation points. (Based on Numerical
Recipies 2nd Edition.) */
static void
spline_solve (int n, gfloat x[], gfloat y[], gfloat y2[])
{
gfloat p, sig, *u;
gint i, k;
u = g_malloc ((n - 1) * sizeof (u[0]));
y2[0] = u[0] = 0.0; /* set lower boundary condition to "natural" */
for (i = 1; i < n - 1; ++i)
{
sig = (x[i] - x[i - 1]) / (x[i + 1] - x[i - 1]);
p = sig * y2[i - 1] + 2.0;
y2[i] = (sig - 1.0) / p;
u[i] = ((y[i + 1] - y[i])
/ (x[i + 1] - x[i]) - (y[i] - y[i - 1]) / (x[i] - x[i - 1]));
u[i] = (6.0 * u[i] / (x[i + 1] - x[i - 1]) - sig * u[i - 1]) / p;
}
y2[n - 1] = 0.0;
for (k = n - 2; k >= 0; --k)
y2[k] = y2[k] * y2[k + 1] + u[k];
g_free (u);
}
static gfloat
spline_eval (int n, gfloat x[], gfloat y[], gfloat y2[], gfloat val)
{
gint k_lo, k_hi, k;
gfloat h, b, a;
/* do a binary search for the right interval: */
k_lo = 0;
k_hi = n - 1;
while (k_hi - k_lo > 1)
{
k = (k_hi + k_lo) / 2;
if (x[k] > val)
k_hi = k;
else
k_lo = k;
}
h = x[k_hi] - x[k_lo];
g_assert (h > 0.0);
a = (x[k_hi] - val) / h;
b = (val - x[k_lo]) / h;
return a*y[k_lo] + b*y[k_hi] +
((a*a*a - a)*y2[k_lo] + (b*b*b - b)*y2[k_hi]) * (h*h)/6.0;
}
static int
project (gfloat value, gfloat min, gfloat max, int norm)
{
return (norm - 1) * ((value - min) / (max - min)) + 0.5;
}
static gfloat
unproject (gint value, gfloat min, gfloat max, int norm)
{
return value / (gfloat) (norm - 1) * (max - min) + min;
}
/* ===================== */
/* =========================== PUBLIC FUNCTIONS =========================== */
/* ===================== */
void
gtk3_curve_set_gamma (GtkWidget *widget, gfloat gamma)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
gfloat x, one_over_gamma, height;
Gtk3CurveType old_type;
gint i;
if (priv->curve_data.n_points < 2)
return;
old_type = priv->curve_data.curve_type;
priv->curve_data.curve_type = GTK3_CURVE_TYPE_FREE;
if (gamma <= 0)
one_over_gamma = 1.0;
else
one_over_gamma = 1.0 / gamma;
height = priv->height;
for (i = 0; i < priv->curve_data.n_points; ++i)
{
x = (gfloat) i / (priv->curve_data.n_points - 1);
priv->curve_data.d_point[i].x = RADIUS + i;
priv->curve_data.d_point[i].y =
RADIUS + (height * (1.0 - pow (x, one_over_gamma)) + 0.5);
}
if (old_type != GTK3_CURVE_TYPE_FREE)
g_signal_emit (curve, curve_type_changed_signal, 0);
priv->width = priv->curve_data.n_points;
DEBUG_INFO("set gamma \n");
if (gtk_widget_is_visible (GTK_WIDGET (curve)))
{
DEBUG_INFO("queue draw \n");
gtk_widget_queue_draw (GTK_WIDGET (curve));
}
}
void
gtk3_curve_set_range (GtkWidget *widget,
gfloat min_x,
gfloat max_x,
gfloat min_y,
gfloat max_y)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
DEBUG_INFO("set range [S]\n");
DEBUG_INFO("min_x[%0.1f] max_x[%0.1f]\n", min_x, max_x);
DEBUG_INFO("min_y[%0.1f] max_y[%0.1f]\n", min_y, max_y);
g_object_freeze_notify (G_OBJECT (curve));
if (priv->min_x != min_x)
{
priv->min_x = min_x;
g_object_notify (G_OBJECT (curve), "min-x");
}
if (priv->max_x != max_x)
{
priv->max_x = max_x;
g_object_notify (G_OBJECT (curve), "max-x");
}
if (priv->min_y != min_y)
{
priv->min_y = min_y;
g_object_notify (G_OBJECT (curve), "min-y");
}
if (priv->max_y != max_y)
{
priv->max_y = max_y;
g_object_notify (G_OBJECT (curve), "max-y");
}
g_object_thaw_notify (G_OBJECT (curve));
gtk3_curve_size_graph (curve);
gtk3_curve_reset_vector (widget);
DEBUG_INFO("set range [E]\n");
}
void
gtk3_curve_get_vector (GtkWidget *widget, int veclen, gfloat vector[])
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
gfloat rx, ry, dx, dy, min_x, delta_x, *mem, *xv, *yv, *y2v, prev;
gint dst, i, x, next, num_active_ctlpoints = 0, first_active = -1;
min_x = priv->min_x;
if (priv->curve_data.curve_type != GTK3_CURVE_TYPE_FREE)
{
/* count active points: */
prev = min_x - 1.0;
for (i = num_active_ctlpoints = 0; i < priv->curve_data.n_cpoints; ++i)
if (priv->curve_data.d_cpoints[i].x > prev)
{
if (first_active < 0)
first_active = i;
prev = priv->curve_data.d_cpoints[i].x;
++num_active_ctlpoints;
}
/* handle degenerate case: */
if (num_active_ctlpoints < 2)
{
if (num_active_ctlpoints > 0)
ry = priv->curve_data.d_cpoints[first_active].y;
else
ry = priv->min_y;
if (ry < priv->min_y) ry = priv->min_y;
if (ry > priv->max_y) ry = priv->max_y;
for (x = 0; x < veclen; ++x)
vector[x] = ry;
return;
}
}
switch (priv->curve_data.curve_type)
{
default:
case GTK3_CURVE_TYPE_SPLINE:
mem = g_malloc (3 * num_active_ctlpoints * sizeof (gfloat));
xv = mem;
yv = mem + num_active_ctlpoints;
y2v = mem + 2*num_active_ctlpoints;
prev = min_x - 1.0;
for (i = dst = 0; i < priv->curve_data.n_cpoints; ++i)
if (priv->curve_data.d_cpoints[i].x > prev)
{
prev = priv->curve_data.d_cpoints[i].x;
xv[dst] = priv->curve_data.d_cpoints[i].x;
yv[dst] = priv->curve_data.d_cpoints[i].y;
++dst;
}
spline_solve (num_active_ctlpoints, xv, yv, y2v);
rx = min_x;
dx = (priv->max_x - min_x) / (veclen - 1);
for (x = 0; x < veclen; ++x, rx += dx)
{
ry = spline_eval (num_active_ctlpoints, xv, yv, y2v, rx);
if (ry < priv->min_y) ry = priv->min_y;
if (ry > priv->max_y) ry = priv->max_y;
vector[x] = ry;
}
g_free (mem);
break;
case GTK3_CURVE_TYPE_LINEAR:
dx = (priv->max_x - min_x) / (veclen - 1);
rx = min_x;
ry = priv->min_y;
dy = 0.0;
i = first_active;
for (x = 0; x < veclen; ++x, rx += dx)
{
if (rx >= priv->curve_data.d_cpoints[i].x)
{
if (rx > priv->curve_data.d_cpoints[i].x)
ry = priv->min_y;
dy = 0.0;
next = i + 1;
while (next < priv->curve_data.n_cpoints
&& priv->curve_data.d_cpoints[next].x <= priv->curve_data.d_cpoints[i].x)
++next;
if (next < priv->curve_data.n_cpoints)
{
delta_x = priv->curve_data.d_cpoints[next].x - priv->curve_data.d_cpoints[i].x;
dy = ((priv->curve_data.d_cpoints[next].y - priv->curve_data.d_cpoints[i].y)
/ delta_x);
dy *= dx;
ry = priv->curve_data.d_cpoints[i].y;
i = next;
}
}
vector[x] = ry;
ry += dy;
}
break;
case GTK3_CURVE_TYPE_FREE:
if (priv->curve_data.d_point)
{
rx = 0.0;
dx = priv->curve_data.n_points / (double) veclen;
for (x = 0; x < veclen; ++x, rx += dx)
vector[x] = unproject (RADIUS + priv->height - priv->curve_data.d_point[(int) rx].y,
priv->min_y, priv->max_y,
priv->height);
}
else
memset (vector, 0, veclen * sizeof (vector[0]));
break;
}
}
void
gtk3_curve_set_vector (GtkWidget *widget, int veclen, gfloat vector[])
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
Gtk3CurveType old_type;
GdkRectangle geom;
gfloat rx, dx, ry;
gint i, height;
GdkDisplay *gdk_display = gdk_display_get_default ();
GdkMonitor *monitor = gdk_display_get_primary_monitor(gdk_display);
gdk_monitor_get_geometry(monitor, &geom);
old_type = priv->curve_data.curve_type;
priv->curve_data.curve_type = GTK3_CURVE_TYPE_FREE;
if (priv->curve_data.d_point)
height = gtk_widget_get_allocated_height(GTK_WIDGET (curve)) - RADIUS * 2;
else
{
height = (priv->max_y - priv->min_y);
if (height >geom.height / 4)
height = geom.height / 4;
priv->height = height;
priv->curve_data.n_points = veclen;
priv->curve_data.d_point = g_malloc (priv->curve_data.n_points * sizeof (priv->curve_data.d_point[0]));
}
rx = 0;
dx = (veclen - 1.0) / (priv->curve_data.n_points - 1.0);
for (i = 0; i < priv->curve_data.n_points; ++i, rx += dx)
{
ry = vector[(int) (rx + 0.5)];
if (ry > priv->max_y) ry = priv->max_y;
if (ry < priv->min_y) ry = priv->min_y;
priv->curve_data.d_point[i].x = RADIUS + i;
priv->curve_data.d_point[i].y =
RADIUS + height - project (ry, priv->min_y, priv->max_y, height);
}
if (old_type != GTK3_CURVE_TYPE_FREE)
{
g_signal_emit (curve, curve_type_changed_signal, 0);
g_object_notify (G_OBJECT (curve), "curve-type");
}
DEBUG_INFO("set vector \n");
priv->width = priv->curve_data.n_points;
if (gtk_widget_is_visible (GTK_WIDGET (curve)))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (GTK_WIDGET (curve));
}
}
void
gtk3_curve_set_curve_type (GtkWidget *widget, Gtk3CurveType new_type)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
gfloat rx, dx;
gint x, i;
if (new_type != priv->curve_data.curve_type)
{
gint width, height;
width = gtk_widget_get_allocated_width(widget) - RADIUS * 2;
height = gtk_widget_get_allocated_height(widget) - RADIUS * 2;
if (new_type == GTK3_CURVE_TYPE_FREE)
{
gtk3_curve_interpolate (widget, width, height);
priv->curve_data.curve_type = new_type;
}
else if (priv->curve_data.curve_type == GTK3_CURVE_TYPE_FREE)
{
g_free (priv->curve_data.d_cpoints);
priv->curve_data.n_cpoints = 9;
priv->curve_data.d_cpoints = g_malloc (priv->curve_data.n_cpoints * sizeof (*priv->curve_data.d_cpoints));
rx = 0.0;
dx = (width - 1) / (gfloat) (priv->curve_data.n_cpoints - 1);
for (i = 0; i < priv->curve_data.n_cpoints; ++i, rx += dx)
{
x = (int) (rx + 0.5);
priv->curve_data.d_cpoints[i].x =
unproject (x, priv->min_x, priv->max_x, width);
priv->curve_data.d_cpoints[i].y =
unproject (RADIUS + height - priv->curve_data.d_point[x].y,
priv->min_y, priv->max_y, height);
}
priv->curve_data.curve_type = new_type;
gtk3_curve_interpolate (widget, width, height);
}
else
{
priv->curve_data.curve_type = new_type;
gtk3_curve_interpolate (widget, width, height);
}
g_signal_emit (curve, curve_type_changed_signal, 0);
g_object_notify (G_OBJECT (curve), "curve-type");
DEBUG_INFO("set curve type\n");
if (gtk_widget_is_visible (GTK_WIDGET (curve)))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (GTK_WIDGET (curve));
}
}
}
void gtk3_curve_set_color_background (GtkWidget *widget, Gtk3CurveColor color)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->background.red = color.red;
priv->background.green = color.green;
priv->background.blue = color.blue;
priv->background.alpha = color.alpha;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
void gtk3_curve_set_color_background_rgba (GtkWidget *widget, gfloat r,
gfloat g, gfloat b, gfloat a)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->background.red = r;
priv->background.green = g;
priv->background.blue = b;
priv->background.alpha = a;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
Gtk3CurveColor gtk3_curve_get_color_background (GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
return priv->background;
}
void gtk3_curve_set_color_grid (GtkWidget *widget, Gtk3CurveColor color)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->grid.red = color.red;
priv->grid.green = color.green;
priv->grid.blue = color.blue;
priv->grid.alpha = color.alpha;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
void gtk3_curve_set_color_grid_rgba (GtkWidget *widget, gfloat r,
gfloat g, gfloat b, gfloat a)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->grid.red = r;
priv->grid.green = g;
priv->grid.blue = b;
priv->grid.alpha = a;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
Gtk3CurveColor gtk3_curve_get_color_grid (GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
return priv->grid;
}
void gtk3_curve_set_color_curve (GtkWidget *widget, Gtk3CurveColor color)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->curve.red = color.red;
priv->curve.green = color.green;
priv->curve.blue = color.blue;
priv->curve.alpha = color.alpha;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
void gtk3_curve_set_color_curve_rgba (GtkWidget *widget, gfloat r,
gfloat g, gfloat b, gfloat a)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->curve.red = r;
priv->curve.green = g;
priv->curve.blue = b;
priv->curve.alpha = a;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
Gtk3CurveColor gtk3_curve_get_color_curve (GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
return priv->curve;
}
void gtk3_curve_set_color_cpoint (GtkWidget *widget, Gtk3CurveColor color)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->cpoint.red = color.red;
priv->cpoint.green = color.green;
priv->cpoint.blue = color.blue;
priv->cpoint.alpha = color.alpha;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
void gtk3_curve_set_color_cpoint_rgba (GtkWidget *widget, gfloat r,
gfloat g, gfloat b, gfloat a)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->cpoint.red = r;
priv->cpoint.green = g;
priv->cpoint.blue = b;
priv->cpoint.alpha = a;
if (gtk_widget_is_visible (widget))
{
DEBUG_INFO("queue draw\n");
gtk_widget_queue_draw (widget);
}
}
Gtk3CurveColor gtk3_curve_get_color_cpoint (GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
return priv->cpoint;
}
Gtk3CurveType gtk3_curve_get_curve_type (GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
return priv->curve_data.curve_type;
}
void gtk3_curve_set_use_theme_background(GtkWidget *widget, gboolean use)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->use_bg_theme = use;
}
gboolean gtk3_curve_get_use_theme_background(GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
return priv->use_bg_theme;
}
void gtk3_curve_set_grid_size(GtkWidget *widget, Gtk3CurveGridSize size)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
priv->grid_size = size;
}
Gtk3CurveGridSize gtk3_curve_get_grid_size(GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
return priv->grid_size;
}
void
gtk3_curve_reset (GtkWidget *widget)
{
Gtk3Curve *curve = GTK3_CURVE (widget);
Gtk3CurvePrivate *priv = curve->priv;
Gtk3CurveType old_type;
old_type = priv->curve_data.curve_type;
priv->curve_data.curve_type = GTK3_CURVE_TYPE_SPLINE;
gtk3_curve_reset_vector (widget);
if (old_type != GTK3_CURVE_TYPE_SPLINE)
{
g_signal_emit (curve, curve_type_changed_signal, 0);
g_object_notify (G_OBJECT (curve), "curve-type");
}
}
void
gtk3_curve_save(Gtk3CurveData *data, gchar *filename) {
// TODO - add code here
}