diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2011-01-07 17:36:01 +0000 |
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committer | Paul Davis <paul@linuxaudiosystems.com> | 2011-01-07 17:36:01 +0000 |
commit | 7d252dbbb9f6698619e6592025824d81a83cffba (patch) | |
tree | 53edfdd3ee488d3d2c7b054c0282fdde28d74baf /gtk2_ardour/mono_panner.cc | |
parent | 603d07a80bb293cb7819e50397111674a96b142c (diff) |
new mono panner widget; make stereo panner respond to changes in colors immediately
git-svn-id: svn://localhost/ardour2/branches/3.0@8474 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'gtk2_ardour/mono_panner.cc')
-rw-r--r-- | gtk2_ardour/mono_panner.cc | 484 |
1 files changed, 484 insertions, 0 deletions
diff --git a/gtk2_ardour/mono_panner.cc b/gtk2_ardour/mono_panner.cc new file mode 100644 index 0000000000..03085c587b --- /dev/null +++ b/gtk2_ardour/mono_panner.cc @@ -0,0 +1,484 @@ +/* + Copyright (C) 2000-2007 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. + +*/ + +#include <iostream> +#include <iomanip> +#include <cstring> +#include <cmath> + +#include <gtkmm/window.h> + +#include "pbd/controllable.h" +#include "pbd/compose.h" + +#include "gtkmm2ext/gui_thread.h" +#include "gtkmm2ext/gtk_ui.h" +#include "gtkmm2ext/keyboard.h" + +#include "ardour/panner.h" + +#include "ardour_ui.h" +#include "global_signals.h" +#include "mono_panner.h" +#include "rgb_macros.h" +#include "utils.h" + +#include "i18n.h" + +using namespace std; +using namespace Gtk; +using namespace Gtkmm2ext; + +static const int pos_box_size = 10; +static const int lr_box_size = 15; +static const int step_down = 10; +static const int top_step = 2; + +MonoPanner::ColorScheme MonoPanner::colors; +bool MonoPanner::have_colors = false; + +MonoPanner::MonoPanner (boost::shared_ptr<PBD::Controllable> position) + : position_control (position) + , dragging (false) + , drag_start_x (0) + , last_drag_x (0) + , accumulated_delta (0) + , detented (false) + , drag_data_window (0) + , drag_data_label (0) + , position_binder (position) +{ + if (!have_colors) { + set_colors (); + have_colors = true; + } + + position_control->Changed.connect (connections, invalidator(*this), boost::bind (&MonoPanner::value_change, this), gui_context()); + + set_flags (Gtk::CAN_FOCUS); + + add_events (Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK| + Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK| + Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK| + Gdk::SCROLL_MASK| + Gdk::POINTER_MOTION_MASK); + + ColorsChanged.connect (sigc::mem_fun (*this, &MonoPanner::color_handler)); +} + +MonoPanner::~MonoPanner () +{ + delete drag_data_window; +} + +void +MonoPanner::set_drag_data () +{ + if (!drag_data_label) { + return; + } + + double pos = position_control->get_value(); // 0..1 + + /* 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"), + (int) rint (100.0 * (1.0 - pos)), + (int) rint (100.0 * pos))); +} + +void +MonoPanner::value_change () +{ + set_drag_data (); + queue_draw (); +} + +bool +MonoPanner::on_expose_event (GdkEventExpose* ev) +{ + Glib::RefPtr<Gdk::Window> win (get_window()); + Glib::RefPtr<Gdk::GC> gc (get_style()->get_base_gc (get_state())); + + cairo_t* cr = gdk_cairo_create (win->gobj()); + + int width, height; + double pos = position_control->get_value (); /* 0..1 */ + uint32_t o, f, t, b, pf, po; + + width = get_width(); + height = get_height (); + + o = colors.outline; + f = colors.fill; + t = colors.text; + b = colors.background; + pf = colors.pos_fill; + po = colors.pos_outline; + + /* background */ + + cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(b), UINT_RGBA_G_FLT(b), UINT_RGBA_B_FLT(b), UINT_RGBA_A_FLT(b)); + 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 */ + + 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 half_lr_box = lr_box_size/2.0; + double left; + double right; + + left = 4 + half_lr_box; // center of left box + right = width - 4 - half_lr_box; // center of right box + + /* center line */ + 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_set_line_width (cr, 1.0); + cairo_move_to (cr, width/2.0, 0); + cairo_line_to (cr, width/2.0, height); + cairo_stroke (cr); + + /* left box */ + + cairo_rectangle (cr, + 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); + 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)); + cairo_fill (cr); + + /* add text */ + + cairo_move_to (cr, + 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); + 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")); + + /* right box */ + + cairo_rectangle (cr, + 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); + 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)); + cairo_fill (cr); + + /* add text */ + + cairo_move_to (cr, + 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)); + cairo_show_text (cr, _("R")); + + /* 2 lines that connect them both */ + 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_set_line_width (cr, 1.0); + cairo_move_to (cr, left + half_lr_box, half_lr_box+step_down); + cairo_line_to (cr, right - half_lr_box, half_lr_box+step_down); + cairo_stroke (cr); + + + cairo_move_to (cr, left + half_lr_box, half_lr_box+step_down+lr_box_size); + cairo_line_to (cr, right - half_lr_box, half_lr_box+step_down+lr_box_size); + cairo_stroke (cr); + + /* draw the position indicator */ + + cairo_set_line_width (cr, 2.0); + 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(po), UINT_RGBA_G_FLT(po), UINT_RGBA_B_FLT(po), UINT_RGBA_A_FLT(po)); + cairo_stroke_preserve (cr); + cairo_set_source_rgba (cr, UINT_RGBA_R_FLT(pf), UINT_RGBA_G_FLT(pf), UINT_RGBA_B_FLT(pf), UINT_RGBA_A_FLT(pf)); + cairo_fill (cr); + + /* done */ + + cairo_destroy (cr); + return true; +} + +bool +MonoPanner::on_button_press_event (GdkEventButton* ev) +{ + drag_start_x = ev->x; + last_drag_x = ev->x; + + dragging = false; + accumulated_delta = 0; + detented = false; + + /* Let the binding proxies get first crack at the press event + */ + + if (ev->y < 20) { + if (position_binder.button_press_handler (ev)) { + return true; + } + } + + if (ev->button != 1) { + return false; + } + + if (ev->type == GDK_2BUTTON_PRESS) { + int width = get_width(); + + if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) { + /* handled by button release */ + return true; + } + + + if (ev->x <= width/3) { + /* left side dbl click */ + position_control->set_value (0); + } else if (ev->x > 2*width/3) { + position_control->set_value (1.0); + } else { + position_control->set_value (0.5); + } + + dragging = false; + + } else if (ev->type == GDK_BUTTON_PRESS) { + + if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) { + /* handled by button release */ + return true; + } + + dragging = true; + } + + return true; +} + +bool +MonoPanner::on_button_release_event (GdkEventButton* ev) +{ + if (ev->button != 1) { + return false; + } + + dragging = false; + accumulated_delta = 0; + detented = false; + + if (drag_data_window) { + drag_data_window->hide (); + } + + if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) { + /* reset to default */ + position_control->set_value (0.5); + } + + return true; +} + +bool +MonoPanner::on_scroll_event (GdkEventScroll* ev) +{ + 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 step; + + if (Keyboard::modifier_state_contains (ev->state, Keyboard::PrimaryModifier)) { + step = one_degree; + } else { + step = one_degree * 5.0; + } + + switch (ev->direction) { + case GDK_SCROLL_UP: + case GDK_SCROLL_LEFT: + pv -= step; + position_control->set_value (pv); + break; + case GDK_SCROLL_DOWN: + case GDK_SCROLL_RIGHT: + pv += step; + position_control->set_value (pv); + break; + } + + return true; +} + +bool +MonoPanner::on_motion_notify_event (GdkEventMotion* ev) +{ + if (!dragging) { + return false; + } + + 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); + + 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_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 (); + } + + int w = get_width(); + double delta = (ev->x - last_drag_x) / (double) w; + + /* create a detent close to the center */ + + if (!detented && ARDOUR::Panner::equivalent (position_control->get_value(), 0.5)) { + detented = true; + /* snap to center */ + position_control->set_value (0.5); + } + + if (detented) { + accumulated_delta += delta; + + /* have we pulled far enough to escape ? */ + + if (fabs (accumulated_delta) >= 0.025) { + position_control->set_value (position_control->get_value() + accumulated_delta); + detented = false; + accumulated_delta = false; + } + } else { + double pv = position_control->get_value(); // 0..1.0 ; 0 = left + position_control->set_value (pv + delta); + } + + last_drag_x = ev->x; + return true; +} + +bool +MonoPanner::on_key_press_event (GdkEventKey* ev) +{ + double one_degree = 1.0/180.0; + double pv = position_control->get_value(); // 0..1.0 ; 0 = left + double step; + + if (Keyboard::modifier_state_contains (ev->state, Keyboard::PrimaryModifier)) { + step = one_degree; + } else { + step = one_degree * 5.0; + } + + /* up/down control width because we consider pan position more "important" + (and thus having higher "sense" priority) than width. + */ + + switch (ev->keyval) { + case GDK_Left: + pv -= step; + position_control->set_value (pv); + break; + case GDK_Right: + pv += step; + position_control->set_value (pv); + break; + default: + return false; + } + + return true; +} + +bool +MonoPanner::on_key_release_event (GdkEventKey* ev) +{ + return false; +} + +bool +MonoPanner::on_enter_notify_event (GdkEventCrossing* ev) +{ + grab_focus (); + Keyboard::magic_widget_grab_focus (); + return false; +} + +bool +MonoPanner::on_leave_notify_event (GdkEventCrossing*) +{ + Keyboard::magic_widget_drop_focus (); + return false; +} + +void +MonoPanner::set_colors () +{ + colors.fill = ARDOUR_UI::config()->canvasvar_MonoPannerFill.get(); + colors.outline = ARDOUR_UI::config()->canvasvar_MonoPannerOutline.get(); + colors.text = ARDOUR_UI::config()->canvasvar_MonoPannerText.get(); + colors.background = ARDOUR_UI::config()->canvasvar_MonoPannerBackground.get(); + colors.pos_outline = ARDOUR_UI::config()->canvasvar_MonoPannerPositionOutline.get(); + colors.pos_fill = ARDOUR_UI::config()->canvasvar_MonoPannerPositionFill.get(); +} + +void +MonoPanner::color_handler () +{ + set_colors (); + queue_draw (); +} |