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GxRegler.cpp
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GxRegler.cpp
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/*
* Copyright (C) 2009, 2010 Hermann Meyer, James Warden, Andreas Degert
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <string.h>
#include "GxRegler.h"
#include "GxControlParameter.h"
#include <gdk/gdkkeysyms.h>
#include "regler_marshal.cc"
#define P_(s) (s) // FIXME -> gettext
#define I_(s) (s) // FIXME -> gettext
/****************************************************************
** GxRegler
*/
struct _GxReglerPrivate
{
GtkRequisition value_req;
gdouble last_step;
int round_digits;
GtkAdjustment *adjustment;
gchar *var_id;
GtkLabel *label;
gboolean show_value:1;
GtkPositionType value_position:2;
gdouble value_xalign;
PangoLayout *value_layout;
};
enum {
VALUE_ENTRY,
FORMAT_VALUE,
INPUT_VALUE,
LAST_SIGNAL
};
enum {
PROP_VAR_ID = 1,
PROP_SHOW_VALUE,
PROP_VALUE_POSITION,
PROP_VALUE_XALIGN,
PROP_LABEL_REF,
PROP_DIGITS,
};
static guint signals[LAST_SIGNAL];
static void gx_regler_class_init(GxReglerClass *klass);
static void gx_regler_init(GxRegler *regler);
static void gx_control_parameter_interface_init (GxControlParameterIface *iface);
static void gx_regler_finalize(GObject*);
static void gx_regler_destroy(GtkWidget *object);
static void gx_regler_set_property(
GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gx_regler_get_property(
GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static gboolean gx_regler_button_release (GtkWidget *widget, GdkEventButton *event);
static gboolean gx_regler_scroll (GtkWidget *widget, GdkEventScroll *event);
static gboolean gx_regler_change_value(GtkRange *range, GtkScrollType scroll, gdouble value);
static void gx_regler_value_changed(GtkRange *range);
static gboolean gx_regler_value_entry(GxRegler *regler, GdkRectangle *rect, GdkEventButton *event);
static void gx_regler_change_adjustment(GxRegler *regler, GtkAdjustment *adjustment);
static void gx_regler_adjustment_notified(GObject *gobject, GParamSpec *pspec);
static void gx_regler_move_slider(GtkRange *range, GtkScrollType scroll);
G_DEFINE_ABSTRACT_TYPE_WITH_CODE(GxRegler, gx_regler, GTK_TYPE_RANGE,
G_ADD_PRIVATE(GxRegler)
G_IMPLEMENT_INTERFACE(GX_TYPE_CONTROL_PARAMETER,
gx_control_parameter_interface_init))
static void gx_regler_value_changed(GtkRange *range)
{
gtk_widget_queue_draw(GTK_WIDGET(range));
}
static void
gx_regler_cp_configure(GxControlParameter *self, const gchar* group, const gchar *name, gdouble lower, gdouble upper, gdouble step)
{
g_return_if_fail(GX_IS_REGLER(self));
GxRegler *regler = GX_REGLER(self);
if (regler->priv->label) {
gtk_label_set_text(regler->priv->label, name);
}
GtkRange *range = GTK_RANGE(self);
gtk_range_set_range(range, lower, upper);
gtk_range_set_increments(range, step, 10*step);
}
static gdouble
gx_regler_cp_get_value(GxControlParameter *self)
{
return gtk_range_get_value(GTK_RANGE(self));
}
static void
gx_regler_cp_set_value(GxControlParameter *self, gdouble value)
{
gtk_range_set_value(GTK_RANGE(self), value);
}
static void
gx_control_parameter_interface_init(GxControlParameterIface *iface)
{
iface->cp_configure = gx_regler_cp_configure;
iface->cp_set_value = gx_regler_cp_set_value;
iface->cp_get_value = gx_regler_cp_get_value;
}
static gboolean gx_boolean_handled_accumulator(
GSignalInvocationHint *ihint, GValue *return_accu,
const GValue *handler_return, gpointer dummy)
{
gboolean continue_emission;
gboolean signal_handled;
signal_handled = g_value_get_boolean (handler_return);
g_value_set_boolean (return_accu, signal_handled);
continue_emission = !signal_handled;
return continue_emission;
}
static gboolean single_string_accumulator(
GSignalInvocationHint *ihint, GValue *return_accu,
const GValue *handler_return, gpointer dummy)
{
gboolean continue_emission;
const gchar *str;
str = g_value_get_string(handler_return);
g_value_set_string(return_accu, str);
continue_emission = str == NULL;
return continue_emission;
}
#define add_slider_binding(binding_set, keyval, mask, scroll) \
//~ gtk_binding_entry_add_signal (binding_set, keyval, mask, \
//~ I_("move-slider"), 1, \
//~ GTK_TYPE_SCROLL_TYPE, scroll)
static void gx_regler_class_init(GxReglerClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
GtkRangeClass *range_class = (GtkRangeClass*)klass;
GtkWidgetClass *widget_class = (GtkWidgetClass*) klass;
//~ GtkBindingSet *binding_set;
gobject_class->finalize = gx_regler_finalize;
gobject_class->set_property = gx_regler_set_property;
gobject_class->get_property = gx_regler_get_property;
/*
widget_class->destroy = gx_regler_destroy;
widget_class->button_release_event = gx_regler_button_release;
widget_class->scroll_event = gx_regler_scroll;
*/
range_class->value_changed = gx_regler_value_changed;
range_class->change_value = gx_regler_change_value;
range_class->move_slider = gx_regler_move_slider;
//~ klass->value_entry = gx_regler_value_entry;
gtk_widget_class_set_css_name(widget_class, "gx-regler");
signals[VALUE_ENTRY] =
g_signal_new (I_("value-entry"),
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GxReglerClass, value_entry),
gx_boolean_handled_accumulator, NULL,
marshal_BOOLEAN__BOXED_BOXED,
G_TYPE_BOOLEAN, 2, GDK_TYPE_RECTANGLE,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
signals[FORMAT_VALUE] =
g_signal_new (I_("format-value"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GxReglerClass, format_value),
single_string_accumulator, NULL,
marshal_STRING__DOUBLE,
G_TYPE_STRING, 1,
G_TYPE_DOUBLE);
signals[INPUT_VALUE] =
g_signal_new (I_("input-value"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GxReglerClass, input_value),
NULL, NULL,
NULL,
G_TYPE_INT, 2,
G_TYPE_POINTER, //FIXME: GtkEntry*, gdouble*
G_TYPE_POINTER);
/*
gtk_widget_class_install_style_property(
widget_class,
g_param_spec_int("border-radius",
P_("Border Radius"),
P_("The radius of the corners in pixels"),
0, 100, 0,
GParamFlags(G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS)));
gtk_widget_class_install_style_property(
widget_class,
g_param_spec_float("bevel",
P_("Bevel"),
P_("The bevel effect"),
-1.0, 1.0, 0.0,
GParamFlags(G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS)));
gtk_widget_class_install_style_property(
widget_class,
g_param_spec_boolean("show-value",
P_("show value"),
P_("display the value"),
TRUE,
GParamFlags(G_PARAM_READABLE|G_PARAM_STATIC_STRINGS)));
gtk_widget_class_install_style_property(
widget_class,
g_param_spec_int("value-spacing",P_("Value spacing"),
P_("Distance of value display"),
0, 100, 5, GParamFlags(G_PARAM_READABLE|G_PARAM_STATIC_STRINGS)));
gtk_widget_class_install_style_property(
widget_class,
g_param_spec_boxed("value-border",
P_("Value Spacing"),
P_("Extra space for value display"),
GTK_TYPE_BORDER,
GParamFlags(G_PARAM_READABLE|G_PARAM_STATIC_STRINGS)));
*/
g_object_class_install_property(
gobject_class, PROP_SHOW_VALUE,
g_param_spec_boolean("show-value",
P_("show value"),
P_("display the value"),
TRUE,
GParamFlags(G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS)));
g_object_class_install_property(
gobject_class, PROP_LABEL_REF,
g_param_spec_object("label-ref",
P_("Label ref"),
P_("GtkLabel for caption"),
GTK_TYPE_LABEL,
GParamFlags(G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS)));
g_object_class_install_property(
gobject_class, PROP_VALUE_POSITION,
g_param_spec_enum("value-position",
P_("Value Position"),
P_("The position of the value display"),
GTK_TYPE_POSITION_TYPE,
GTK_POS_BOTTOM,
GParamFlags(G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS)));
g_object_class_install_property(
gobject_class, PROP_VALUE_XALIGN,
g_param_spec_double("value-xalign",
P_("Value Alignment"),
P_("The horizontal position of the value (0..1)"),
0, 1, 0.5,
GParamFlags(G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS)));
g_object_class_install_property(
gobject_class, PROP_DIGITS,
g_param_spec_int("digits",
P_("Digits"),
P_("Number of digits for display"),
0, 10, 1,
GParamFlags(G_PARAM_READABLE|G_PARAM_STATIC_STRINGS)));
g_object_class_override_property(gobject_class, PROP_VAR_ID, "var-id");
//~ binding_set = gtk_binding_set_by_class(klass);
add_slider_binding (binding_set, GDK_KEY_Left, (GdkModifierType)0,
GTK_SCROLL_STEP_LEFT);
add_slider_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_LEFT);
add_slider_binding (binding_set, GDK_KEY_KP_Left, (GdkModifierType)0,
GTK_SCROLL_STEP_LEFT);
add_slider_binding (binding_set, GDK_KEY_KP_Left, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_LEFT);
add_slider_binding (binding_set, GDK_KEY_Right, (GdkModifierType)0,
GTK_SCROLL_STEP_RIGHT);
add_slider_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_RIGHT);
add_slider_binding (binding_set, GDK_KEY_KP_Right, (GdkModifierType)0,
GTK_SCROLL_STEP_RIGHT);
add_slider_binding (binding_set, GDK_KEY_KP_Right, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_RIGHT);
add_slider_binding (binding_set, GDK_KEY_Up, (GdkModifierType)0,
GTK_SCROLL_STEP_UP);
add_slider_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_UP);
add_slider_binding (binding_set, GDK_KEY_KP_Up, (GdkModifierType)0,
GTK_SCROLL_STEP_UP);
add_slider_binding (binding_set, GDK_KEY_KP_Up, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_UP);
add_slider_binding (binding_set, GDK_KEY_Down, (GdkModifierType)0,
GTK_SCROLL_STEP_DOWN);
add_slider_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_DOWN);
add_slider_binding (binding_set, GDK_KEY_KP_Down, (GdkModifierType)0,
GTK_SCROLL_STEP_DOWN);
add_slider_binding (binding_set, GDK_KEY_KP_Down, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_DOWN);
add_slider_binding (binding_set, GDK_KEY_Page_Up, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_LEFT);
add_slider_binding (binding_set, GDK_KEY_KP_Page_Up, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_LEFT);
add_slider_binding (binding_set, GDK_KEY_Page_Up, (GdkModifierType)0,
GTK_SCROLL_PAGE_UP);
add_slider_binding (binding_set, GDK_KEY_KP_Page_Up, (GdkModifierType)0,
GTK_SCROLL_PAGE_UP);
add_slider_binding (binding_set, GDK_KEY_Page_Down, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_RIGHT);
add_slider_binding (binding_set, GDK_KEY_KP_Page_Down, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_RIGHT);
add_slider_binding (binding_set, GDK_KEY_Page_Down, (GdkModifierType)0,
GTK_SCROLL_PAGE_DOWN);
add_slider_binding (binding_set, GDK_KEY_KP_Page_Down, (GdkModifierType)0,
GTK_SCROLL_PAGE_DOWN);
/* Logical bindings (vs. visual bindings above) */
add_slider_binding (binding_set, GDK_KEY_plus, (GdkModifierType)0,
GTK_SCROLL_STEP_FORWARD);
add_slider_binding (binding_set, GDK_KEY_minus, (GdkModifierType)0,
GTK_SCROLL_STEP_BACKWARD);
add_slider_binding (binding_set, GDK_KEY_plus, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_FORWARD);
add_slider_binding (binding_set, GDK_KEY_minus, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_BACKWARD);
add_slider_binding (binding_set, GDK_KEY_KP_Add, (GdkModifierType)0,
GTK_SCROLL_STEP_FORWARD);
add_slider_binding (binding_set, GDK_KEY_KP_Subtract, (GdkModifierType)0,
GTK_SCROLL_STEP_BACKWARD);
add_slider_binding (binding_set, GDK_KEY_KP_Add, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_FORWARD);
add_slider_binding (binding_set, GDK_KEY_KP_Subtract, GDK_CONTROL_MASK,
GTK_SCROLL_PAGE_BACKWARD);
add_slider_binding (binding_set, GDK_KEY_Home, (GdkModifierType)0,
GTK_SCROLL_START);
add_slider_binding (binding_set, GDK_KEY_KP_Home, (GdkModifierType)0,
GTK_SCROLL_START);
add_slider_binding (binding_set, GDK_KEY_End, (GdkModifierType)0,
GTK_SCROLL_END);
add_slider_binding (binding_set, GDK_KEY_KP_End, (GdkModifierType)0,
GTK_SCROLL_END);
}
static void gx_regler_destroy(GtkWidget *object)
{
GxRegler *regler = GX_REGLER(object);
if (regler->priv->label) {
g_object_unref(regler->priv->label);
regler->priv->label = NULL;
}
gx_regler_change_adjustment(regler, NULL);
g_signal_handlers_disconnect_by_func(
regler, (gpointer)gx_regler_adjustment_notified, NULL);
//~ GTK_WIDGET_CLASS(gx_regler_parent_class)->destroy(object);
}
static void gx_regler_finalize(GObject *object)
{
GxRegler *regler = GX_REGLER(object);
g_free(regler->priv->var_id);
if (regler->priv->value_layout) {
g_object_unref(regler->priv->value_layout);
}
G_OBJECT_CLASS(gx_regler_parent_class)->finalize(object);
}
static void step_back(GtkRange *range)
{
gdouble newval;
gboolean handled;
GtkAdjustment *adjustment = gtk_range_get_adjustment(range);
newval = gtk_adjustment_get_value(adjustment) - gtk_adjustment_get_step_increment(adjustment);
g_signal_emit_by_name(range, "change-value", GTK_SCROLL_STEP_BACKWARD, newval, &handled);
}
static void step_forward(GtkRange *range)
{
gdouble newval;
gboolean handled;
GtkAdjustment *adjustment = gtk_range_get_adjustment(range);
newval = gtk_adjustment_get_value(adjustment) + gtk_adjustment_get_step_increment(adjustment);
g_signal_emit_by_name(range, "change-value", GTK_SCROLL_STEP_FORWARD, newval, &handled);
}
static void page_back(GtkRange *range)
{
gdouble newval;
gboolean handled;
GtkAdjustment *adjustment = gtk_range_get_adjustment(range);
newval = gtk_adjustment_get_value(adjustment) - gtk_adjustment_get_page_increment(adjustment);
g_signal_emit_by_name(range, "change-value", GTK_SCROLL_PAGE_BACKWARD, newval, &handled);
}
static void page_forward(GtkRange *range)
{
gdouble newval;
gboolean handled;
GtkAdjustment *adjustment = gtk_range_get_adjustment(range);
newval = gtk_adjustment_get_value(adjustment) + gtk_adjustment_get_page_increment(adjustment);
g_signal_emit_by_name(range, "change-value", GTK_SCROLL_PAGE_FORWARD, newval, &handled);
}
static void scroll_begin(GtkRange *range)
{
gboolean handled;
g_signal_emit_by_name(range, "change-value", GTK_SCROLL_START,
gtk_adjustment_get_lower(gtk_range_get_adjustment(range)),
&handled);
}
static void scroll_end(GtkRange *range)
{
gdouble newval;
gboolean handled;
GtkAdjustment *adjustment = gtk_range_get_adjustment(range);
newval = gtk_adjustment_get_upper(adjustment) - gtk_adjustment_get_page_size(adjustment);
g_signal_emit_by_name(range, "change-value", GTK_SCROLL_END, newval, &handled);
}
static gboolean should_invert(GtkRange *range)
{
gboolean inverted = gtk_range_get_inverted(range);
if (gtk_orientable_get_orientation(GTK_ORIENTABLE(range)) == GTK_ORIENTATION_HORIZONTAL) {
gboolean flippable = gtk_range_get_flippable(range);
return
(inverted && !flippable) ||
(inverted && flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_LTR) ||
(!inverted && flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
} else {
return inverted;
}
}
static gboolean gx_regler_scroll(GtkRange *range, GtkScrollType scroll)
{
gdouble old_value = gtk_range_get_value(range);
switch (scroll) {
case GTK_SCROLL_STEP_DOWN:
case GTK_SCROLL_STEP_LEFT:
if (should_invert (range))
step_forward (range);
else
step_back (range);
break;
case GTK_SCROLL_STEP_UP:
case GTK_SCROLL_STEP_RIGHT:
if (should_invert (range))
step_back (range);
else
step_forward (range);
break;
case GTK_SCROLL_STEP_BACKWARD:
step_back (range);
break;
case GTK_SCROLL_STEP_FORWARD:
step_forward (range);
break;
case GTK_SCROLL_PAGE_DOWN:
case GTK_SCROLL_PAGE_LEFT:
if (should_invert (range))
page_forward (range);
else
page_back (range);
break;
case GTK_SCROLL_PAGE_UP:
case GTK_SCROLL_PAGE_RIGHT:
if (should_invert (range))
page_back (range);
else
page_forward (range);
break;
case GTK_SCROLL_PAGE_BACKWARD:
page_back (range);
break;
case GTK_SCROLL_PAGE_FORWARD:
page_forward (range);
break;
case GTK_SCROLL_START:
scroll_begin (range);
break;
case GTK_SCROLL_END:
scroll_end (range);
break;
case GTK_SCROLL_JUMP:
case GTK_SCROLL_NONE:
break;
}
return gtk_range_get_value(range) != old_value;
}
static void gx_regler_move_slider(GtkRange *range, GtkScrollType scroll)
{
gboolean cursor_only;
g_object_get(gtk_widget_get_settings(GTK_WIDGET(range)),
"gtk-keynav-cursor-only", &cursor_only,
NULL);
/*
if (cursor_only) {
GtkWidget *toplevel = gtk_widget_get_toplevel(GTK_WIDGET(range));
if (gtk_orientable_get_orientation(GTK_ORIENTABLE(range)) == GTK_ORIENTATION_HORIZONTAL) {
if (scroll == GTK_SCROLL_STEP_UP || scroll == GTK_SCROLL_STEP_DOWN) {
if (toplevel) {
gtk_widget_child_focus(toplevel,
scroll == GTK_SCROLL_STEP_UP ?
GTK_DIR_UP : GTK_DIR_DOWN);
}
return;
}
} else {
if (scroll == GTK_SCROLL_STEP_LEFT || scroll == GTK_SCROLL_STEP_RIGHT) {
if (toplevel) {
gtk_widget_child_focus(toplevel,
scroll == GTK_SCROLL_STEP_LEFT ?
GTK_DIR_LEFT : GTK_DIR_RIGHT);
}
return;
}
}
}
*/
if (!gx_regler_scroll (range, scroll)) {
gtk_widget_error_bell(GTK_WIDGET(range));
}
}
static void ensure_digits(GxRegler *regler)
{
GxReglerPrivate *priv = regler->priv;
GtkAdjustment *adj = gtk_range_get_adjustment(GTK_RANGE(regler));
if (!adj) {
return;
}
gdouble v = gtk_adjustment_get_step_increment(adj);
if (v == priv->last_step) {
return;
}
priv->last_step = v;
gint n = 0;
if (v > 0.0) {
while (v < 1.0 - 1e-3) {
v *= 10;
n++;
}
}
priv->round_digits = n;
}
static gboolean gx_regler_change_value(GtkRange *range, GtkScrollType scroll, gdouble value)
{
g_assert(GX_IS_REGLER(range));
return GTK_RANGE_CLASS(gx_regler_parent_class)->change_value(range, scroll, value);
}
/****************************************************************
** calculate the knop pointer with dead zone
*/
/*
** when this function gets inlined (e.g. -O3) in GxKnob.c:_gx_knob_pointer_event
** bad things will happen, at least with g++ (Ubuntu 4.4.3-4ubuntu5) 4.4.3 (funny
** lockup in malloc semaphore after returning from first signal handler...)
** I'm don't know how to generate assembler output commented with original C code,
** without its rather unreadable, and anyhow I don't really want to debug the
** compiler. Inlining for this function can also be prevented with
** __attribute__((noinline)) for the function definition in the header file. /ad
*/
gboolean _approx_in_rectangle(gdouble x, gdouble y, GdkRectangle *rect)
{
const int off = 5;
if (rect->width == 0 || rect->height == 0) {
return FALSE;
}
else if (x >= rect->x-off && x < rect->x + rect->width + off &&
y >= rect->y-off && y < rect->y + rect->height + off) {
return TRUE;
}
return FALSE;
}
static void gx_regler_ensure_layout(GxRegler *regler)
{
if (regler->priv->show_value && !regler->priv->value_layout) {
regler->priv->value_layout = gtk_widget_create_pango_layout(GTK_WIDGET(regler), NULL);
}
}
#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
#endif
#ifndef max
#define max(x, y) ((x) < (y) ? (y) : (x))
#endif
gdouble _gx_regler_get_step_pos(GxRegler *regler, gint step)
{
GtkAdjustment *adj = gtk_range_get_adjustment(GTK_RANGE(regler));
gdouble lower = gtk_adjustment_get_lower(adj);
double df = gtk_adjustment_get_upper(adj) - lower;
if (df == 0.0) {
return 0.0;
} else {
return (gtk_adjustment_get_value(adj) - lower) * step / df;
}
}
void _gx_regler_get_positions(GxRegler *regler, GdkRectangle *image_rect,
GdkRectangle *value_rect, gboolean hfill)
{
GtkWidget *widget = GTK_WIDGET(regler);
GtkStyleContext *style = gtk_widget_get_style_context(widget);
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
gint x = 0;
gint y = 0;
gint width = 0;
gint height = 0;
if (image_rect) {
width = image_rect->width;
height = image_rect->height;
}
gboolean show_value;
//~ gtk_style_context_get_style(style, "show-value", &show_value, NULL);
if (regler->priv->show_value && show_value) {
GxReglerPrivate *priv = regler->priv;
gint text_width = priv->value_req.width;
gint text_height = priv->value_req.height;
gint text_x = 0, text_y = 0;
gint value_spacing;
//~ gtk_style_context_get_style(style, "value-spacing", &value_spacing, NULL);
switch (priv->value_position) {
case GTK_POS_LEFT:
text_x = x + (allocation.width - width - text_width - value_spacing) / 2;
text_y = y + (allocation.height - text_height) / 2;
if (image_rect) {
image_rect->x = x + (allocation.width - width + text_width + value_spacing) / 2;
image_rect->y = y + (allocation.height - height) / 2;
}
break;
case GTK_POS_RIGHT:
text_x = x + value_spacing + (allocation.width + width - text_width - value_spacing) / 2;
text_y = y + (allocation.height - text_height) / 2;
if (image_rect) {
image_rect->x = x + (allocation.width - width - text_width - value_spacing) / 2;
image_rect->y = y + (allocation.height - height) / 2;
}
break;
case GTK_POS_TOP:
text_x = x + (allocation.width - text_width) / 2;
text_y = y + (allocation.height - height - text_height - value_spacing) / 2;
if (image_rect) {
image_rect->x = x + (allocation.width - width) / 2;
image_rect->y = y + (allocation.height - height + text_height + value_spacing) / 2;
}
break;
case GTK_POS_BOTTOM:
text_x = x + (allocation.width - text_width) / 2;
text_y = y + value_spacing + (allocation.height + height - text_height - value_spacing) / 2;
if (image_rect) {
image_rect->x = x + (allocation.width - width) / 2;
image_rect->y = y + (allocation.height - height - text_height - value_spacing) / 2;
}
break;
}
if (value_rect) {
if (hfill) {
value_rect->x = 0;
value_rect->width = allocation.width;
} else {
value_rect->x = text_x;
value_rect->width = text_width;
}
value_rect->y = text_y;
value_rect->height = text_height;
}
} else {
if (image_rect) {
image_rect->x = x + (allocation.width - width) / 2;
image_rect->y = y + (allocation.height - height) / 2;
}
if (value_rect) {
value_rect->x = value_rect->y = value_rect->width = value_rect->height = 0;
}
}
}
gboolean _gx_regler_check_display_popup(GxRegler *regler, GdkRectangle *image_rect,
GdkRectangle *value_rect, GdkEventButton *event)
{
// check if value entry popup requested
gdouble x = event->x;
gdouble y = event->y;
GdkRectangle *rect = NULL;
if (image_rect && _approx_in_rectangle(x, y, image_rect)) {
if (event->button == 3) {
rect = image_rect;
}
} else if (value_rect && _approx_in_rectangle(x, y, value_rect)) {
if (event->button == 1 || event->button == 3) {
rect = value_rect;
} else {
return TRUE;
}
} else {
return TRUE;
}
if (rect) {
gboolean ret;
g_signal_emit_by_name(regler, "value-entry", rect, event, &ret);
return TRUE;
}
return FALSE;
}
static gchar* _gx_regler_format_value(GxRegler *regler, gdouble value)
{
gchar *fmt = NULL;
g_signal_emit(regler, signals[FORMAT_VALUE], 0, value, &fmt);
if (fmt) {
return fmt;
} else {
int rd = regler->priv->round_digits;
if (rd < 0) {
rd = 0;
}
return g_strdup_printf ("%0.*f", rd, value);
}
}
static const GtkBorder default_value_border = { 6, 6, 3, 3 };
static void get_value_border(GtkStyleContext *style, GtkBorder *value_border)
{
GtkBorder *tmp_border;
//~ gtk_style_context_get_style(style, "value-border", &tmp_border, NULL);
if (tmp_border) {
*value_border = *tmp_border;
gtk_border_free(tmp_border);
} else {
*value_border = default_value_border;
}
}
void _gx_regler_simple_display_value(GxRegler *regler, cairo_t *cr, GdkRectangle *rect)
{
if (!regler->priv->show_value) {
return;
}
GtkStyleContext *style = gtk_widget_get_style_context(GTK_WIDGET(regler));
gboolean show_value;
//~ gtk_style_context_get_style(style, "show-value", &show_value, NULL);
if (!show_value) {
return;
}
PangoLayout *l = regler->priv->value_layout;
PangoRectangle logical_rect;
gchar *txt;
ensure_digits(regler);
txt = _gx_regler_format_value(regler, gtk_range_get_value(GTK_RANGE(regler)));
pango_layout_set_text(l, txt, -1);
g_free (txt);
pango_layout_get_pixel_extents(l, NULL, &logical_rect);
GtkBorder border;
get_value_border(style, &border);
gtk_render_layout(style, cr,
rect->x + (rect->width - logical_rect.width + border.left - border.right) / 2,
rect->y + border.top, regler->priv->value_layout);
}
#define DISPLAY_BORDER_SIZE 2
void _gx_regler_display_value(GxRegler *regler, cairo_t *cr, GdkRectangle *rect)
{
if (!regler->priv->show_value) {
return;
}
gboolean show_value;
GtkWidget * widget = GTK_WIDGET(regler);
GtkStyleContext *style = gtk_widget_get_style_context(widget);
GtkStateFlags state_flags = gtk_widget_get_state_flags(widget);
//~ gtk_style_context_get_style(style, "show-value", &show_value, NULL);
if (!show_value) {
return;
}
double x0 = rect->x + DISPLAY_BORDER_SIZE;
double y0 = rect->y + DISPLAY_BORDER_SIZE;
double w = rect->width - 2 * DISPLAY_BORDER_SIZE;
double h = rect->height - 2 * DISPLAY_BORDER_SIZE;
gint rad;
GtkStyleContext *sc = gtk_widget_get_style_context(widget);
//~ gtk_widget_style_get(widget, "border-radius", &rad, NULL);
gx_draw_inset(cr, x0, y0, w, h, rad, DISPLAY_BORDER_SIZE);
gtk_render_background(sc, cr, x0, y0, w, h);
gx_draw_glass(cr, x0, y0, w, h, rad);
gchar *txt;
ensure_digits(regler);
txt = _gx_regler_format_value(regler, gtk_range_get_value(GTK_RANGE(regler)));
GdkRGBA color;
//~ gtk_style_context_get_color(style, state_flags, &color);
cairo_set_source_rgba(cr, color.red, color.green, color.blue, color.alpha);
PangoLayout *l = regler->priv->value_layout;
pango_layout_set_text(l, txt, -1);
g_free(txt);
PangoRectangle logical_rect;
pango_layout_get_pixel_extents(l, NULL, &logical_rect);
GtkBorder border;
get_value_border(style, &border);
gdouble off = border.left + regler->priv->value_xalign *
(w - logical_rect.width - (border.left + border.right));
cairo_move_to(cr, x0+off, y0+border.top);
pango_cairo_show_layout(cr, l);
}
/*
* _gx_regler_calc_size_request()
* calculate size of value display and add it to *out_width and *out_height
*
* setting of with_border when using
* _gx_regler_simple_display_value: false
* _gx_regler_display_value(): true
*
* value-spacing shifts the displayed value (padding between regler and value display)
* to make acts as padding around the displayed value between border
*
* value-border is the padding around the displayed value (and inside the border when with_border is set)
*/
void _gx_regler_calc_size_request(GxRegler *regler, gint *out_width, gint *out_height, gboolean with_border)
{
if (!regler->priv->show_value) {
return;
}
GtkStyleContext *style = gtk_widget_get_style_context(GTK_WIDGET(regler));
gboolean show_value;
//~ gtk_style_context_get_style(style, "show-value", &show_value, NULL);
if (!show_value) {
return;
}
gx_regler_ensure_layout(regler);
PangoRectangle logical_rect1, logical_rect2;
GtkAdjustment *adj = gtk_range_get_adjustment(GTK_RANGE(regler));
gchar *txt;
ensure_digits(regler);
txt = _gx_regler_format_value(regler, gtk_adjustment_get_lower(adj));
pango_layout_set_text(regler->priv->value_layout, txt, -1);
g_free(txt);
pango_layout_get_pixel_extents(regler->priv->value_layout, NULL, &logical_rect1);
txt = _gx_regler_format_value(regler, gtk_adjustment_get_upper(adj));
pango_layout_set_text(regler->priv->value_layout, txt, -1);
g_free(txt);
pango_layout_get_pixel_extents(regler->priv->value_layout, NULL, &logical_rect2);
GtkBorder border;
get_value_border(style, &border);
gint height = max(logical_rect1.height,logical_rect2.height)
+ border.top + border.bottom + 2 * DISPLAY_BORDER_SIZE;
gint width = max(logical_rect1.width,logical_rect2.width)
+ border.left + border.right + 2 * DISPLAY_BORDER_SIZE;
GxReglerPrivate *priv = regler->priv;
priv->value_req.width = width;
priv->value_req.height = height;
gint value_spacing;
//~ gtk_style_context_get_style(style, "value-spacing", &value_spacing, NULL);
switch (regler->priv->value_position) {
case GTK_POS_LEFT:
case GTK_POS_RIGHT:
*out_width += width + value_spacing;
if (height > *out_height) {
*out_height = height;
}
break;
case GTK_POS_TOP:
case GTK_POS_BOTTOM:
*out_height += height + value_spacing;
if (width > *out_width) {
*out_width = width;
}
break;
}
}
/****************************************************************
** set value from key bindings
*/
static void gx_regler_set_value (GtkWidget *widget, GdkScrollDirection dir_down)
{
g_assert(GX_IS_REGLER(widget));
if (dir_down != GDK_SCROLL_DOWN && dir_down != GDK_SCROLL_UP) {
return;
}
GtkAdjustment *adj = gtk_range_get_adjustment(GTK_RANGE(widget));
gdouble adj_value = gtk_adjustment_get_value(adj);
gdouble lower = gtk_adjustment_get_lower(adj);
gdouble upper = gtk_adjustment_get_upper(adj);
gdouble step_increment = gtk_adjustment_get_step_increment(adj);
int oldstep = (int)(0.5f + (adj_value - lower) / step_increment);
int step;
int nsteps = (int)(0.5f + (upper - lower) / step_increment);
if (dir_down == GDK_SCROLL_DOWN)
step = oldstep - 1;
else
step = oldstep + 1;
gdouble value = lower + step * (upper - lower) / nsteps;
gtk_widget_grab_focus(widget);
gtk_range_set_value(GTK_RANGE(widget), value);
}
/****************************************************************
** mouse button pressed set value