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livetrax/libs/gtkmm2ext/barcontroller.cc

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/*
Copyright (C) 2004 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
*/
#include <string>
#include <climits>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <midi++/controllable.h>
#include <gtkmm2ext/gtk_ui.h>
#include <gtkmm2ext/barcontroller.h>
#include "i18n.h"
using namespace std;
using namespace Gtk;
using namespace Gtkmm2ext;
BarController::BarController (Gtk::Adjustment& adj,
MIDI::Controllable *mc,
sigc::slot<void,char*,unsigned int> lc)
: adjustment (adj),
prompter (Gtk::WIN_POS_MOUSE, 30000, false),
midi_control (mc),
label_callback (lc),
spinner (adjustment),
bind_button (2),
bind_statemask (Gdk::CONTROL_MASK)
{
_style = LeftToRight;
grabbed = false;
switching = false;
switch_on_release = false;
with_text = true;
use_parent = false;
layout = darea.create_pango_layout("");
set_shadow_type (SHADOW_NONE);
initial_value = adjustment.get_value ();
adjustment.signal_value_changed().connect (mem_fun (*this, &Gtk::Widget::queue_draw));
adjustment.signal_changed().connect (mem_fun (*this, &Gtk::Widget::queue_draw));
darea.add_events (Gdk::BUTTON_RELEASE_MASK|
Gdk::BUTTON_PRESS_MASK|
Gdk::POINTER_MOTION_MASK|
Gdk::ENTER_NOTIFY_MASK|
Gdk::LEAVE_NOTIFY_MASK);
darea.signal_expose_event().connect (mem_fun (*this, &BarController::expose));
darea.signal_motion_notify_event().connect (mem_fun (*this, &BarController::motion));
darea.signal_button_press_event().connect (mem_fun (*this, &BarController::button_press));
darea.signal_button_release_event().connect (mem_fun (*this, &BarController::button_release));
prompter.signal_unmap_event().connect (mem_fun (*this, &BarController::prompter_hiding));
prompting = false;
unprompting = false;
if (mc) {
mc->learning_started.connect (mem_fun (*this, &BarController::midicontrol_prompt));
mc->learning_stopped.connect (mem_fun (*this, &BarController::midicontrol_unprompt));
}
spinner.signal_activate().connect (mem_fun (*this, &BarController::entry_activated));
spinner.signal_focus_out_event().connect (mem_fun (*this, &BarController::entry_focus_out));
spinner.set_digits (3);
add (darea);
show_all ();
}
void
BarController::set_bind_button_state (guint button, guint statemask)
{
bind_button = button;
bind_statemask = statemask;
}
void
BarController::get_bind_button_state (guint &button, guint &statemask)
{
button = bind_button;
statemask = bind_statemask;
}
gint
BarController::button_press (GdkEventButton* ev)
{
switch (ev->button) {
case 1:
if (ev->type == GDK_2BUTTON_PRESS) {
switch_on_release = true;
} else {
switch_on_release = false;
darea.add_modal_grab();
grabbed = true;
grab_x = ev->x;
grab_window = ev->window;
StartGesture ();
}
return TRUE;
break;
case 2:
case 3:
break;
case 4:
case 5:
break;
}
return FALSE;
}
gint
BarController::button_release (GdkEventButton* ev)
{
switch (ev->button) {
case 1:
if (switch_on_release) {
Glib::signal_idle().connect (mem_fun (*this, &BarController::switch_to_spinner));
return TRUE;
}
if ((ev->state & (GDK_SHIFT_MASK|GDK_CONTROL_MASK)) == GDK_SHIFT_MASK) {
adjustment.set_value (initial_value);
} else {
double scale;
if (ev->state & (GDK_CONTROL_MASK|GDK_SHIFT_MASK) == (GDK_CONTROL_MASK|GDK_SHIFT_MASK)) {
scale = 0.01;
} else if (ev->state & GDK_CONTROL_MASK) {
scale = 0.1;
} else {
scale = 1.0;
}
mouse_control (ev->x, ev->window, scale);
}
grabbed = false;
darea.remove_modal_grab();
StopGesture ();
break;
case 2:
if ((ev->state & bind_statemask) && bind_button == 2) {
midi_learn ();
} else {
double fract;
fract = ev->x / (darea.get_width() - 2.0);
adjustment.set_value (adjustment.get_lower() +
fract * (adjustment.get_upper() - adjustment.get_lower()));
}
return TRUE;
case 3:
if ((ev->state & bind_statemask) && bind_button == 3) {
midi_learn ();
return TRUE;
}
return FALSE;
case 4:
adjustment.set_value (adjustment.get_value() +
adjustment.get_step_increment());
break;
case 5:
adjustment.set_value (adjustment.get_value() -
adjustment.get_step_increment());
break;
}
return TRUE;
}
gint
BarController::motion (GdkEventMotion* ev)
{
double scale;
if (!grabbed) {
return TRUE;
}
if ((ev->state & (GDK_SHIFT_MASK|GDK_CONTROL_MASK)) == GDK_SHIFT_MASK) {
return TRUE;
}
if (ev->state & (GDK_CONTROL_MASK|GDK_SHIFT_MASK) == (GDK_CONTROL_MASK|GDK_SHIFT_MASK)) {
scale = 0.01;
} else if (ev->state & GDK_CONTROL_MASK) {
scale = 0.1;
} else {
scale = 1.0;
}
return mouse_control (ev->x, ev->window, scale);
}
gint
BarController::mouse_control (double x, GdkWindow* window, double scaling)
{
double fract;
double delta;
if (window != grab_window) {
grab_x = x;
grab_window = window;
return TRUE;
}
delta = x - grab_x;
grab_x = x;
switch (_style) {
case Line:
case LeftToRight:
fract = scaling * (delta / (darea.get_width() - 2));
fract = min (1.0, fract);
fract = max (-1.0, fract);
adjustment.set_value (adjustment.get_value() + fract * (adjustment.get_upper() - adjustment.get_lower()));
break;
default:
fract = 0.0;
}
return TRUE;
}
gint
BarController::expose (GdkEventExpose* event)
{
Glib::RefPtr<Gdk::Window> win (darea.get_window());
Widget* parent;
gint x1, x2, y1, y2;
gint w, h;
double fract;
w = darea.get_width() - 2;
h = darea.get_height() - 2;
fract = ((adjustment.get_value() - adjustment.get_lower()) /
(adjustment.get_upper() - adjustment.get_lower()));
switch (_style) {
case Line:
x1 = (gint) floor (w * fract);
x2 = x1;
y1 = 0;
y2 = h - 1;
if (use_parent) {
parent = get_parent();
if (parent) {
win->draw_rectangle (parent->get_style()->get_fg_gc (parent->get_state()),
true,
0, 0, darea.get_width(), darea.get_height());
}
} else {
win->draw_rectangle (get_style()->get_bg_gc (get_state()),
true,
0, 0, darea.get_width(), darea.get_height());
}
if (fract == 0.0) {
win->draw_rectangle (get_style()->get_fg_gc (get_state()),
true, x1, 1, 2, darea.get_height() - 2);
} else {
win->draw_rectangle (get_style()->get_fg_gc (get_state()),
true, x1 - 1, 1, 3, darea.get_height() - 2);
}
break;
case CenterOut:
break;
case LeftToRight:
x1 = 0;
x2 = (gint) floor (w * fract);
y1 = 0;
y2 = h - 1;
win->draw_rectangle (get_style()->get_bg_gc (get_state()),
false,
0, 0, darea.get_width() - 1, darea.get_height() - 1);
/* draw active box */
win->draw_rectangle (get_style()->get_fg_gc (get_state()),
true,
1 + x1,
1 + y1,
x2,
1 + y2);
/* draw inactive box */
win->draw_rectangle (get_style()->get_fg_gc (STATE_INSENSITIVE),
true,
1 + x2,
1 + y1,
w - x2,
1 + y2);
break;
case RightToLeft:
break;
case TopToBottom:
break;
case BottomToTop:
break;
}
if (with_text) {
/* draw label */
char buf[64];
buf[0] = '\0';
label_callback (buf, 64);
if (buf[0] != '\0') {
int width;
int height;
layout->set_text (buf);
layout->get_pixel_size(width, height);
int xpos;
xpos = max (3, 1 + (x2 - (width/2)));
xpos = min (darea.get_width() - width - 3, xpos);
win->draw_layout (get_style()->get_text_gc (get_state()),
xpos,
(darea.get_height()/2) - (height/2),
layout);
}
}
return TRUE;
}
void
BarController::set_with_text (bool yn)
{
if (with_text != yn) {
with_text = yn;
queue_draw ();
}
}
void
BarController::midicontrol_set_tip ()
{
if (midi_control) {
// Gtkmm2ext::UI::instance()->set_tip (&darea, midi_control->control_description());
}
}
void
BarController::midi_learn()
{
if (midi_control) {
prompting = true;
midi_control->learn_about_external_control ();
}
}
void
BarController::midicontrol_prompt ()
{
if (prompting) {
string prompt = _("operate MIDI controller now");
prompter.set_text (prompt);
Gtkmm2ext::UI::instance()->touch_display (&prompter);
unprompting = true;
prompting = false;
}
}
void
BarController::midicontrol_unprompt ()
{
if (unprompting) {
Gtkmm2ext::UI::instance()->touch_display (&prompter);
unprompting = false;
}
}
gint
BarController::prompter_hiding (GdkEventAny *ev)
{
if (unprompting) {
if (midi_control) {
midi_control->stop_learning();
}
unprompting = false;
}
return FALSE;
}
void
BarController::set_style (Style s)
{
_style = s;
darea.queue_draw ();
}
gint
BarController::switch_to_bar ()
{
if (switching) {
return FALSE;
}
switching = true;
if (get_child() == &darea) {
return FALSE;
}
remove ();
add (darea);
darea.show ();
switching = false;
return FALSE;
}
gint
BarController::switch_to_spinner ()
{
if (switching) {
return FALSE;
}
switching = true;
if (get_child() == &spinner) {
return FALSE;
}
remove ();
add (spinner);
spinner.show ();
spinner.grab_focus ();
switching = false;
return FALSE;
}
void
BarController::entry_activated ()
{
string text = spinner.get_text ();
float val;
if (sscanf (text.c_str(), "%f", &val) == 1) {
adjustment.set_value (val);
}
switch_to_bar ();
}
gint
BarController::entry_focus_out (GdkEventFocus* ev)
{
entry_activated ();
return TRUE;
}
void
BarController::set_use_parent (bool yn)
{
use_parent = yn;
queue_draw ();
}