, width_control (width)
, dragging (false)
, dragging_position (false)
+ , dragging_left (false)
+ , dragging_right (false)
, drag_start_x (0)
, last_drag_x (0)
+ , accumulated_delta (0)
+ , drag_data_window (0)
+ , drag_data_label (0)
{
if (!have_colors) {
set_colors ();
position_control->Changed.connect (connections, invalidator(*this), boost::bind (&StereoPanner::value_change, this), gui_context());
width_control->Changed.connect (connections, invalidator(*this), boost::bind (&StereoPanner::value_change, this), gui_context());
- set_tooltip ();
+ set_tooltip ();
set_flags (Gtk::CAN_FOCUS);
add_events (Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK|
StereoPanner::~StereoPanner ()
{
+ delete drag_data_window;
}
void
StereoPanner::set_tooltip ()
{
+ Gtkmm2ext::UI::instance()->set_tip (this,
+ string_compose (_("0 -> set width to zero (mono)\n%1-uparrow -> set width to 100\n%1-downarrow -> set width to -100"),
+
+ Keyboard::secondary_modifier_name()).c_str());
+}
+
+void
+StereoPanner::unset_tooltip ()
+{
+ Gtkmm2ext::UI::instance()->set_tip (this, "");
+}
+
+void
+StereoPanner::set_drag_data ()
+{
+ if (!drag_data_label) {
+ return;
+ }
+
double pos = position_control->get_value(); // 0..1
- double w = width_control->get_value (); // -1..+1
- int lpos = (int) lrint ((pos - (w/2.0)) * 100.0);
- int rpos = (int) lrint ((pos + (w/2.0)) * 100.0);
-
- Gtkmm2ext::UI::instance()->set_tip (this, string_compose (_("L:%1 R:%2 Width: %3%%"),
- lpos, rpos,
- (int) floor (w * 100.0)).c_str());
+
+ /* We show the position of the center of the image relative to the left & right.
+ This is expressed as a pair of percentage values that ranges from (100,0)
+ (hard left) through (50,50) (hard center) to (0,100) (hard right).
+
+ This is pretty wierd, but its the way audio engineers expect it. Just remember that
+ the center of the USA isn't Kansas, its (50LA, 50NY) and it will all make sense.
+ */
+
+ drag_data_label->set_markup (string_compose (_("L:%1 R:%2 Width: %3%%"),
+ (int) rint (100.0 * (1.0 - pos)),
+ (int) rint (100.0 * pos),
+ (int) floor (100.0 * width_control->get_value())));
}
void
StereoPanner::value_change ()
{
- set_tooltip ();
+ set_drag_data ();
queue_draw ();
}
cairo_rectangle (cr, 0, 0, width, height);
cairo_fill (cr);
+ /* the usable width is reduced from the real width, because we need space for
+ the two halves of LR boxes that will extend past the actual left/right
+ positions (indicated by the vertical line segment above them).
+ */
+
+ double usable_width = width - lr_box_size;
+
/* compute the centers of the L/R boxes based on the current stereo width */
-
- int usable_width = width - lr_box_size;
- int center = lr_box_size/2 + (int) floor (usable_width * pos);
- int left = center - (int) floor (fswidth * usable_width / 2.0); // center of leftmost box
- int right = center + (int) floor (fswidth * usable_width / 2.0); // center of rightmost box
- // cerr << "pos " << pos << " width = " << width << " swidth = " << swidth << " center @ " << center << " L = " << left << " R = " << right << endl;
+ if (fmod (usable_width,2.0) == 0) {
+ /* even width, but we need odd, so that there is an exact center.
+ So, offset cairo by 1, and reduce effective width by 1
+ */
+ usable_width -= 1.0;
+ cairo_translate (cr, 1.0, 0.0);
+ }
+
+ double center = (lr_box_size/2.0) + (usable_width * pos);
+ const double pan_spread = (fswidth * usable_width)/2.0;
+ const double half_lr_box = lr_box_size/2.0;
+ int left;
+ int right;
+
+ left = center - pan_spread; // center of left box
+ right = center + pan_spread; // center of right box
/* compute & draw the line through the box */
cairo_line_to (cr, right, top_step+(pos_box_size/2) + step_down);
cairo_stroke (cr);
- if (swidth < 0.0) {
- /* flip where the L/R boxes are drawn */
- swap (left, right);
- }
-
/* left box */
- left -= lr_box_size/2;
- right -= lr_box_size/2;
-
cairo_rectangle (cr,
- left,
- (lr_box_size/2)+step_down,
+ left - half_lr_box,
+ half_lr_box+step_down,
lr_box_size, lr_box_size);
cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
cairo_stroke_preserve (cr);
/* add text */
cairo_move_to (cr,
- left + 3,
+ left - half_lr_box + 3,
(lr_box_size/2) + step_down + 13);
cairo_select_font_face (cr, "sans-serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
+
if (state != Mono) {
cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(t), UINT_RGBA_G_FLT(t), UINT_RGBA_B_FLT(t), UINT_RGBA_A_FLT(t));
- cairo_show_text (cr, "L");
+ if (swidth < 0.0) {
+ cairo_show_text (cr, _("R"));
+ } else {
+ cairo_show_text (cr, _("L"));
+ }
}
/* right box */
cairo_rectangle (cr,
- right,
- (lr_box_size/2)+step_down,
+ right - half_lr_box,
+ half_lr_box+step_down,
lr_box_size, lr_box_size);
cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
cairo_stroke_preserve (cr);
/* add text */
cairo_move_to (cr,
- right + 3,
+ right - half_lr_box + 3,
(lr_box_size/2)+step_down + 13);
cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(t), UINT_RGBA_G_FLT(t), UINT_RGBA_B_FLT(t), UINT_RGBA_A_FLT(t));
+
if (state == Mono) {
- cairo_show_text (cr, "M");
+ cairo_show_text (cr, _("M"));
} else {
- cairo_show_text (cr, "R");
+ if (swidth < 0.0) {
+ cairo_show_text (cr, _("L"));
+ } else {
+ cairo_show_text (cr, _("R"));
+ }
}
/* draw the central box */
cairo_set_line_width (cr, 1);
- cairo_rectangle (cr, center - (pos_box_size/2), top_step, pos_box_size, pos_box_size);
+ cairo_rectangle (cr, lrint (center - (pos_box_size/2.0)), top_step, pos_box_size, pos_box_size);
cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
cairo_stroke_preserve (cr);
cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(f), UINT_RGBA_G_FLT(f), UINT_RGBA_B_FLT(f), UINT_RGBA_A_FLT(f));
{
drag_start_x = ev->x;
last_drag_x = ev->x;
+
+ dragging_position = false;
+ dragging_left = false;
+ dragging_right = false;
+ accumulated_delta = 0;
if (ev->y < 20) {
/* top section of widget is for position drags */
dragging_position = true;
} else {
- dragging_position = false;
+ /* lower section is for dragging width */
+
+ double pos = position_control->get_value (); /* 0..1 */
+ double swidth = width_control->get_value (); /* -1..+1 */
+ double fswidth = fabs (swidth);
+ int usable_width = get_width() - lr_box_size;
+ double center = (lr_box_size/2.0) + (usable_width * pos);
+ int left = lrint (center - (fswidth * usable_width / 2.0)); // center of leftmost box
+ int right = lrint (center + (fswidth * usable_width / 2.0)); // center of rightmost box
+ const int half_box = lr_box_size/2;
+
+ if (ev->x >= (left - half_box) && ev->x < (left + half_box)) {
+ dragging_left = true;
+ } else if (ev->x >= (right - half_box) && ev->x < (right + half_box)) {
+ dragging_right = true;
+ }
+
}
if (ev->type == GDK_2BUTTON_PRESS) {
if (dragging_position) {
- cerr << "Reset pos\n";
- position_control->set_value (0.5); // reset position to center
+ int width = get_width();
+ if (ev->x >= width/2 - 10 && ev->x <= width/2 + 10) {
+ /* double click near center, reset position to center */
+ position_control->set_value (0.5);
+ } else {
+ if (ev->x < width/2) {
+ /* double click on left, collapse to hard left */
+ width_control->set_value (0);
+ position_control->set_value (0);
+ } else {
+ /* double click on right, collapse to hard right */
+ width_control->set_value (0);
+ position_control->set_value (1.0);
+ }
+ }
} else {
- cerr << "Reset width\n";
- width_control->set_value (1.0); // reset position to full, LR
+ if (dragging_left) {
+ width_control->set_value (1.0); // reset width to 100%
+ } else if (dragging_right) {
+ width_control->set_value (-1.0); // reset width to inverted 100%
+ } else {
+ width_control->set_value (0); // collapse width to 0%
+ }
+
}
+
dragging = false;
+
} else {
dragging = true;
}
{
dragging = false;
dragging_position = false;
+ dragging_left = false;
+ dragging_right = false;
+ accumulated_delta = 0;
+
+ if (drag_data_window) {
+ drag_data_window->hide ();
+ }
+
+ set_tooltip ();
+
return true;
}
bool
StereoPanner::on_scroll_event (GdkEventScroll* ev)
{
- double one_degree = 1.0/180.0;
+ double one_degree = 1.0/180.0; // one degree as a number from 0..1, since 180 degrees is the full L/R axis
double pv = position_control->get_value(); // 0..1.0 ; 0 = left
double wv = width_control->get_value(); // 0..1.0 ; 0 = left
double step;
return false;
}
- int w = get_width();
- double delta = (abs (ev->x - last_drag_x)) / (w/2.0);
- int drag_dir = 0;
-
- if (!dragging_position) {
- double wv = width_control->get_value();
- int inc;
- double old_wv;
- double opx; // compute the operational x-coordinate given the current pos+width
+ if (!drag_data_window) {
+ drag_data_window = new Window (WINDOW_POPUP);
+ drag_data_window->set_position (WIN_POS_MOUSE);
+ drag_data_window->set_decorated (false);
- if (wv > 0) {
- /* positive value: increasing width means adding */
- inc = 1;
- } else {
- /* positive value: increasing width means subtracting */
- inc = -1;
+ drag_data_label = manage (new Label);
+ drag_data_label->set_use_markup (true);
+
+ drag_data_window->set_border_width (6);
+ drag_data_window->add (*drag_data_label);
+ drag_data_label->show ();
+
+ Window* toplevel = dynamic_cast<Window*> (get_toplevel());
+ if (toplevel) {
+ drag_data_window->set_transient_for (*toplevel);
}
+ }
- if (drag_start_x < w/2) {
- /* started left of center */
+ if (!drag_data_window->is_visible ()) {
+ /* move the window a little away from the mouse */
+ drag_data_window->move (ev->x_root+30, ev->y_root+30);
+ drag_data_window->present ();
+ unset_tooltip ();
+ }
- opx = position_control->get_value() - (wv/2.0);
+ int w = get_width();
+ double delta = (ev->x - last_drag_x) / (double) w;
+
+ if (dragging_left) {
+ delta = -delta;
+ }
- if (opx < 0.5) {
- /* still left */
- if (ev->x > last_drag_x) {
- /* motion to left */
- drag_dir = -inc;
- } else {
- drag_dir = inc;
- }
- } else {
- /* now right */
- if (ev->x > last_drag_x) {
- /* motion to left */
- drag_dir = inc;
- } else {
- drag_dir = -inc;
- }
- }
- } else {
- /* started right of center */
-
- opx = position_control->get_value() + (wv/2.0);
-
- if (opx > 0.5) {
- /* still right */
- if (ev->x < last_drag_x) {
- /* motion to right */
- drag_dir = -inc;
- } else {
- drag_dir = inc;
- }
- } else {
- /* now left */
- if (ev->x < last_drag_x) {
- /* motion to right */
- drag_dir = inc;
- } else {
- drag_dir = -inc;
- }
- }
+ if (dragging_left || dragging_right) {
- }
+ /* maintain position as invariant as we change the width */
- old_wv = wv;
- wv = wv + (drag_dir * delta);
-
- width_control->set_value (wv);
+ double current_width = width_control->get_value ();
- } else {
+ /* create a detent close to the center */
- double pv = position_control->get_value(); // 0..1.0 ; 0 = left
-
- if (ev->x > last_drag_x) { // increasing
- pv = pv + delta;
+ if (fabs (current_width) < 0.1) {
+ accumulated_delta += delta;
+ /* in the detent - have we pulled far enough to escape ? */
+ if (fabs (accumulated_delta) >= 0.1) {
+ width_control->set_value (current_width + accumulated_delta);
+ accumulated_delta = 0;
+ } else {
+ /* snap to zero */
+ width_control->set_value (0);
+ }
} else {
- pv = pv - delta;
+ width_control->set_value (current_width + delta);
}
- position_control->set_value (pv);
+ } else if (dragging_position) {
+
+ double pv = position_control->get_value(); // 0..1.0 ; 0 = left
+ position_control->set_value (pv + delta);
}
last_drag_x = ev->x;
projects / ardour.git / blobdiff