/* * Copyright (C) 2006 Paul Davis * Copyright (C) 2017-2018 Robin Gareus * Copyright (C) 2017 Julien "_FrnchFrgg_" RIVAUD * * 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 #include #include "gtkmm2ext/cairo_widget.h" #include "gtkmm2ext/colors.h" #include "gtkmm2ext/keyboard.h" #include "gtkmm2ext/rgb_macros.h" #include "gtkmm2ext/utils.h" #include "widgets/ardour_fader.h" #include "widgets/ui_config.h" using namespace Gtk; using namespace std; using namespace Gtkmm2ext; using namespace ArdourWidgets; #define CORNER_RADIUS 2.5 #define CORNER_SIZE 2 #define CORNER_OFFSET 1 #define FADER_RESERVE 6 std::list ArdourFader::_patterns; ArdourFader::ArdourFader (Gtk::Adjustment& adj, int orientation, int fader_length, int fader_girth) : FaderWidget (adj, orientation) , _layout (0) , _text_width (0) , _text_height (0) , _span (fader_length) , _girth (fader_girth) , _min_span (fader_length) , _min_girth (fader_girth) , _pattern (0) , _centered_text (true) , _current_parent (0) , have_explicit_bg (false) , have_explicit_fg (false) , outline_color (0) { update_unity_position (); add_events (Gdk::TOUCH_UPDATE_MASK); if (_orien == VERT) { CairoWidget::set_size_request(_girth, _span); } else { CairoWidget::set_size_request(_span, _girth); } outline_color = UIConfigurationBase::instance().color ("fader outline"); } ArdourFader::~ArdourFader () { if (_parent_style_change) _parent_style_change.disconnect(); if (_layout) _layout.clear (); // drop reference to existing layout } void ArdourFader::flush_pattern_cache () { for (list::iterator f = _patterns.begin(); f != _patterns.end(); ++f) { cairo_pattern_destroy ((*f)->pattern); } _patterns.clear(); } cairo_pattern_t* ArdourFader::find_pattern (double afr, double afg, double afb, double abr, double abg, double abb, int w, int h) { for (list::iterator f = _patterns.begin(); f != _patterns.end(); ++f) { if ((*f)->matches (afr, afg, afb, abr, abg, abb, w, h)) { return (*f)->pattern; } } return 0; } void ArdourFader::create_patterns () { Gdk::Color c = fg_color (get_state()); float fr, fg, fb; float br, bg, bb; fr = c.get_red_p (); fg = c.get_green_p (); fb = c.get_blue_p (); c = bg_color (get_state()); br = c.get_red_p (); bg = c.get_green_p (); bb = c.get_blue_p (); cairo_surface_t* surface; cairo_t* tc = 0; if (get_width() <= 1 || get_height() <= 1) { return; } if ((_pattern = find_pattern (fr, fg, fb, br, bg, bb, get_width(), get_height())) != 0) { /* found it - use it */ return; } if (_orien == VERT) { surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width(), get_height() * 2.0); tc = cairo_create (surface); /* paint background + border */ cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, get_width(), 0); cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.4,bg*0.4,bb*0.4, 1.0); cairo_pattern_add_color_stop_rgba (shade_pattern, 0.25, br*0.6,bg*0.6,bb*0.6, 1.0); cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.8,bg*0.8,bb*0.8, 1.0); cairo_set_source (tc, shade_pattern); cairo_rectangle (tc, 0, 0, get_width(), get_height() * 2.0); cairo_fill (tc); cairo_pattern_destroy (shade_pattern); /* paint lower shade */ shade_pattern = cairo_pattern_create_linear (0.0, 0.0, get_width() - 2 - CORNER_OFFSET , 0); cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0); cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0); cairo_set_source (tc, shade_pattern); Gtkmm2ext::rounded_top_half_rectangle (tc, CORNER_OFFSET, get_height() + CORNER_OFFSET, get_width() - CORNER_SIZE, get_height(), CORNER_RADIUS); cairo_fill (tc); cairo_pattern_destroy (shade_pattern); _pattern = cairo_pattern_create_for_surface (surface); } else { surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width() * 2.0, get_height()); tc = cairo_create (surface); /* paint right shade (background section)*/ cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height()); cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.4,bg*0.4,bb*0.4, 1.0); cairo_pattern_add_color_stop_rgba (shade_pattern, 0.25, br*0.6,bg*0.6,bb*0.6, 1.0); cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.8,bg*0.8,bb*0.8, 1.0); cairo_set_source (tc, shade_pattern); cairo_rectangle (tc, 0, 0, get_width() * 2.0, get_height()); cairo_fill (tc); /* paint left shade (active section/foreground) */ shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height()); cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0); cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0); cairo_set_source (tc, shade_pattern); Gtkmm2ext::rounded_right_half_rectangle (tc, CORNER_OFFSET, CORNER_OFFSET, get_width() - CORNER_OFFSET, get_height() - CORNER_SIZE, CORNER_RADIUS); cairo_fill (tc); cairo_pattern_destroy (shade_pattern); _pattern = cairo_pattern_create_for_surface (surface); } /* cache it for others to use */ _patterns.push_back (new FaderImage (_pattern, fr, fg, fb, br, bg, bb, get_width(), get_height())); cairo_destroy (tc); cairo_surface_destroy (surface); } Gdk::Color ArdourFader::bg_color (Gtk::StateType s) { if (have_explicit_bg) { return gdk_color_from_rgba (explicit_bg); } return get_style()->get_bg (s); } Gdk::Color ArdourFader::fg_color (Gtk::StateType s) { if (have_explicit_fg) { Gtkmm2ext::HSV hsv; if (_hovering || (s == Gtk::STATE_PRELIGHT)) { hsv = HSV (explicit_fg); hsv.s *= 0.50; return gdk_color_from_rgba (hsv.color()); } switch (s) { case Gtk::STATE_NORMAL: return gdk_color_from_rgba (explicit_fg); return gdk_color_from_rgba (hsv.color()); case Gtk::STATE_SELECTED: return gdk_color_from_rgba (explicit_fg); case Gtk::STATE_ACTIVE: return gdk_color_from_rgba (explicit_fg); case Gtk::STATE_INSENSITIVE: return get_style()->get_fg (s); case Gtk::STATE_PRELIGHT: break; } } return get_style()->get_fg (s); } void ArdourFader::render (Cairo::RefPtr const& ctx, cairo_rectangle_t* area) { cairo_t* cr = ctx->cobj(); if (!_pattern) { create_patterns(); } if (!_pattern) { /* this isn't supposed to be happen, but some wackiness whereby * the pixfader ends up with a 1xN or Nx1 size allocation * leads to it. the basic wackiness needs fixing but we * shouldn't crash. just fill in the expose area with * our bg color. */ CairoWidget::set_source_rgb_a (cr, bg_color (get_state()), 1); cairo_rectangle (cr, area->x, area->y, area->width, area->height); cairo_fill (cr); return; } OnExpose(); int ds = display_span (); const float w = get_width(); const float h = get_height(); CairoWidget::set_source_rgb_a (cr, get_parent_bg(), 1); cairo_rectangle (cr, 0, 0, w, h); cairo_fill(cr); cairo_set_line_width (cr, 2); Gtkmm2ext::set_source_rgba (cr, outline_color); cairo_matrix_t matrix; Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, CORNER_OFFSET, w-CORNER_SIZE, h-CORNER_SIZE, CORNER_RADIUS); // we use a 'trick' here: The stoke is off by .5px but filling the interior area // after a stroke of 2px width results in an outline of 1px cairo_stroke_preserve(cr); if (_orien == VERT) { if (ds > h - FADER_RESERVE - CORNER_OFFSET) { ds = h - FADER_RESERVE - CORNER_OFFSET; } if (!CairoWidget::flat_buttons()) { cairo_set_source (cr, _pattern); cairo_matrix_init_translate (&matrix, 0, (h - ds)); cairo_pattern_set_matrix (_pattern, &matrix); } else { CairoWidget::set_source_rgb_a (cr, bg_color (get_state()), 1); cairo_fill (cr); CairoWidget::set_source_rgb_a (cr, fg_color (get_state()), 1); Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, ds + CORNER_OFFSET, w - CORNER_SIZE, h - ds - CORNER_SIZE, CORNER_RADIUS); } cairo_fill (cr); } else { if (ds < FADER_RESERVE) { ds = FADER_RESERVE; } assert(ds <= w); /* * if ds == w, the pattern does not need to be translated * if ds == 0 (or FADER_RESERVE), the pattern needs to be moved * w to the left, which is -w in pattern space, and w in user space * if ds == 10, then the pattern needs to be moved w - 10 * to the left, which is -(w-10) in pattern space, which * is (w - 10) in user space * thus: translation = (w - ds) */ if (!CairoWidget::flat_buttons() ) { cairo_set_source (cr, _pattern); cairo_matrix_init_translate (&matrix, w - ds, 0); cairo_pattern_set_matrix (_pattern, &matrix); } else { CairoWidget::set_source_rgb_a (cr, bg_color (get_state()), 1); cairo_fill (cr); CairoWidget::set_source_rgb_a (cr, fg_color (get_state()), 1); Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, CORNER_OFFSET, ds - CORNER_SIZE, h - CORNER_SIZE, CORNER_RADIUS); } cairo_fill (cr); } /* draw the unity-position line if it's not at either end*/ if (!(_tweaks & NoShowUnityLine) && _unity_loc > CORNER_RADIUS) { cairo_set_line_width(cr, 1); cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND); Gdk::Color c = fg_color (Gtk::STATE_ACTIVE); cairo_set_source_rgba (cr, c.get_red_p() * 1.5, c.get_green_p() * 1.5, c.get_blue_p() * 1.5, 0.85); if (_orien == VERT) { if (_unity_loc < h - CORNER_RADIUS) { cairo_move_to (cr, 1.5, _unity_loc + CORNER_OFFSET + .5); cairo_line_to (cr, _girth - 1.5, _unity_loc + CORNER_OFFSET + .5); cairo_stroke (cr); } } else { if (_unity_loc < w - CORNER_RADIUS) { cairo_move_to (cr, _unity_loc - CORNER_OFFSET + .5, 1.5); cairo_line_to (cr, _unity_loc - CORNER_OFFSET + .5, _girth - 1.5); cairo_stroke (cr); } } } if (_layout && !_text.empty() && _orien == HORIZ) { Gdk::Color bg_col; cairo_save (cr); if (_centered_text) { /* center text */ cairo_move_to (cr, (w - _text_width)/2.0, h/2.0 - _text_height/2.0); bg_col = bg_color (get_state()); } else if (ds > .5 * w) { cairo_move_to (cr, CORNER_OFFSET + 3, h/2.0 - _text_height/2.0); bg_col = fg_color (get_state()); } else { cairo_move_to (cr, w - _text_width - CORNER_OFFSET - 3, h/2.0 - _text_height/2.0); bg_col = bg_color (get_state()); } const uint32_t r = bg_col.get_red_p () * 255.0; const uint32_t g = bg_col.get_green_p () * 255.0; const uint32_t b = bg_col.get_blue_p () * 255.0; const uint32_t a = 0xff; uint32_t rgba = RGBA_TO_UINT (r, g, b, a); rgba = contrasting_text_color (rgba); Gdk::Color text_color; text_color.set_rgb ((rgba >> 24)*256, ((rgba & 0xff0000) >> 16)*256, ((rgba & 0xff00) >> 8)*256); CairoWidget::set_source_rgb_a (cr, text_color, 1.); pango_cairo_show_layout (cr, _layout->gobj()); cairo_restore (cr); } if (!get_sensitive()) { Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, CORNER_OFFSET, w-CORNER_SIZE, h-CORNER_SIZE, CORNER_RADIUS); cairo_set_source_rgba (cr, 0.505, 0.517, 0.525, 0.4); cairo_fill (cr); } else if (_hovering && CairoWidget::widget_prelight() && !have_explicit_fg) { Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, CORNER_OFFSET, w-CORNER_SIZE, h-CORNER_SIZE, CORNER_RADIUS); cairo_set_source_rgba (cr, 0.905, 0.917, 0.925, 0.1); cairo_fill (cr); } } void ArdourFader::on_size_request (GtkRequisition* req) { if (_orien == VERT) { req->width = (_min_girth ? _min_girth : -1); req->height = (_min_span ? _min_span : -1); } else { req->height = (_min_girth ? _min_girth : -1); req->width = (_min_span ? _min_span : -1); } } void ArdourFader::on_size_allocate (Gtk::Allocation& alloc) { int old_girth = _girth; int old_span = _span; CairoWidget::on_size_allocate(alloc); if (_orien == VERT) { _girth = alloc.get_width (); _span = alloc.get_height (); } else { _girth = alloc.get_height (); _span = alloc.get_width (); } if (get_realized() && ((old_girth != _girth) || (old_span != _span))) { /* recreate patterns in case we've changed size */ create_patterns (); } update_unity_position (); } bool ArdourFader::on_motion_notify_event (GdkEventMotion* ev) { if (_dragging) { double scale = 1.0; double const ev_pos = (_orien == VERT) ? ev->y : ev->x; if (ev->window != _grab_window) { _grab_loc = ev_pos; _grab_window = ev->window; return true; } if (ev->state & Keyboard::GainFineScaleModifier) { if (ev->state & Keyboard::GainExtraFineScaleModifier) { scale = 0.005; } else { scale = 0.1; } } double const delta = ev_pos - _grab_loc; _grab_loc = ev_pos; const double off = FADER_RESERVE + ((_orien == VERT) ? CORNER_OFFSET : 0); const double span = _span - off; double fract = (delta / span); fract = min (1.0, fract); fract = max (-1.0, fract); // X Window is top->bottom for 0..Y if (_orien == VERT) { fract = -fract; } _adjustment.set_value (_adjustment.get_value() + scale * fract * (_adjustment.get_upper() - _adjustment.get_lower())); } return true; } bool ArdourFader::on_touch_update_event (GdkEventTouch* ev) { GdkEventMotion mev; mev.window = ev->window; mev.time = ev->time; mev.x = ev->x; mev.y = ev->y; mev.state = 0; return ArdourFader::on_motion_notify_event (&mev); } /** @return pixel offset of the current value from the right or bottom of the fader */ int ArdourFader::display_span () { float fract = (_adjustment.get_value () - _adjustment.get_lower()) / ((_adjustment.get_upper() - _adjustment.get_lower())); int ds; if (_orien == VERT) { const double off = FADER_RESERVE + CORNER_OFFSET; const double span = _span - off; ds = (int)rint (span * (1.0 - fract)); } else { const double off = FADER_RESERVE; const double span = _span - off; ds = (int)rint (span * fract + off); } return ds; } void ArdourFader::update_unity_position () { if (_orien == VERT) { const double span = _span - FADER_RESERVE - CORNER_OFFSET; _unity_loc = (int) rint (span * (1 - ((_default_value - _adjustment.get_lower()) / (_adjustment.get_upper() - _adjustment.get_lower())))) - 1; } else { const double span = _span - FADER_RESERVE; _unity_loc = (int) rint (FADER_RESERVE + (_default_value - _adjustment.get_lower()) * span / (_adjustment.get_upper() - _adjustment.get_lower())); } queue_draw (); } void ArdourFader::set_adjustment_from_event (GdkEventButton* ev) { const double off = FADER_RESERVE + ((_orien == VERT) ? CORNER_OFFSET : 0); const double span = _span - off; double fract = (_orien == VERT) ? (1.0 - ((ev->y - off) / span)) : ((ev->x - off) / span); fract = min (1.0, fract); fract = max (0.0, fract); _adjustment.set_value (fract * (_adjustment.get_upper () - _adjustment.get_lower ())); } void ArdourFader::set_default_value (float d) { _default_value = d; update_unity_position (); } void ArdourFader::set_text (const std::string& str, bool centered, bool expose) { if (_layout && _text == str) { return; } if (!_layout && !str.empty()) { _layout = Pango::Layout::create (get_pango_context()); } _text = str; _centered_text = centered; if (_layout) { _layout->set_text (str); _layout->get_pixel_size (_text_width, _text_height); // queue_resize (); if (expose) queue_draw (); } } void ArdourFader::on_state_changed (Gtk::StateType old_state) { Widget::on_state_changed (old_state); create_patterns (); queue_draw (); } void ArdourFader::on_style_changed (const Glib::RefPtr& style) { CairoWidget::on_style_changed (style); if (_layout) { std::string txt = _layout->get_text(); _layout.clear (); // drop reference to existing layout _text = ""; set_text (txt, _centered_text, false); queue_resize (); } /* patterns are cached and re-created as needed * during 'expose' in the GUI thread */ _pattern = 0; queue_draw (); } Gdk::Color ArdourFader::get_parent_bg () { Widget* parent = get_parent (); while (parent) { if (parent->get_has_window()) { break; } parent = parent->get_parent(); } if (parent && parent->get_has_window()) { if (_current_parent != parent) { if (_parent_style_change) _parent_style_change.disconnect(); _current_parent = parent; _parent_style_change = parent->signal_style_changed().connect (mem_fun (*this, &ArdourFader::on_style_changed)); } return parent->get_style ()->get_bg (parent->get_state()); } return get_style ()->get_bg (get_state()); } void ArdourFader::set_bg (Gtkmm2ext::Color c) { explicit_bg = c; have_explicit_bg = true; _pattern = 0; queue_draw (); } void ArdourFader::set_fg (Gtkmm2ext::Color c) { explicit_fg = c; have_explicit_fg = true; _pattern = 0; queue_draw (); } void ArdourFader::unset_bg () { if (have_explicit_bg) { have_explicit_bg = false; _pattern = 0; queue_draw (); } } void ArdourFader::unset_fg () { if (have_explicit_fg) { have_explicit_fg = false; _pattern = 0; queue_draw (); } }