X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fgtkmm2ext%2Fpixfader.cc;h=f4e362bca1b6ec0b3670d3a110354c8fa9cd2bad;hb=0f47a171c9d757f6d9091df7da5f8bef11eaba74;hp=a77750b243dfb890e9fac08660e8323e184dc6d1;hpb=a3bcba2357f4ab724b9c840bacd79f4d6c959415;p=ardour.git diff --git a/libs/gtkmm2ext/pixfader.cc b/libs/gtkmm2ext/pixfader.cc index a77750b243..f4e362bca1 100644 --- a/libs/gtkmm2ext/pixfader.cc +++ b/libs/gtkmm2ext/pixfader.cc @@ -20,38 +20,35 @@ #include + +#include "pbd/stacktrace.h" + #include "gtkmm2ext/pixfader.h" #include "gtkmm2ext/keyboard.h" +#include "gtkmm2ext/rgb_macros.h" +#include "gtkmm2ext/utils.h" using namespace Gtkmm2ext; using namespace Gtk; -using namespace Gdk; using namespace std; +#define CORNER_RADIUS 4 +#define FADER_RESERVE (2*CORNER_RADIUS) -int PixFader::fine_scale_modifier = Keyboard::PrimaryModifier; -int PixFader::extra_fine_scale_modifier = Keyboard::SecondaryModifier; - -PixFader::PixFader (Glib::RefPtr belt, Gtk::Adjustment& adj, int orientation, int fader_length) +std::list PixFader::_patterns; - : adjustment (adj), - pixbuf (belt), - _orien(orientation) +PixFader::PixFader (Gtk::Adjustment& adj, int orientation, int fader_length, int fader_girth) + : adjustment (adj) + , span (fader_length) + , girth (fader_girth) + , _orien (orientation) + , pattern (0) + , _hovering (false) + , last_drawn (-1) + , dragging (false) { - dragging = false; default_value = adjustment.get_value(); - last_drawn = -1; - - view.x = 0; - view.y = 0; - - if (orientation == VERT) { - view.width = girth = pixbuf->get_width(); - } else { - view.height = girth = pixbuf->get_height(); - } - - set_fader_length (fader_length); + update_unity_position (); add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK|Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK); @@ -63,94 +60,327 @@ PixFader::~PixFader () { } -bool -PixFader::on_expose_event (GdkEventExpose* ev) +cairo_pattern_t* +PixFader::find_pattern (double afr, double afg, double afb, + double abr, double abg, double abb, + int w, int h) { - GdkRectangle intersection; - int srcx, srcy; + 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 +PixFader::create_patterns () +{ + Gdk::Color c = get_style()->get_fg (get_state()); + float fr, fg, fb; + float br, bg, bb; - int const ds = display_span (); + fr = c.get_red_p (); + fg = c.get_green_p (); + fb = c.get_blue_p (); - int offset_into_pixbuf = (int) floor (span / ((float) span / ds)); + c = get_style()->get_bg (get_state()); - /* account for fader lengths that are shorter than the fader pixbuf */ - if (_orien == VERT) { - offset_into_pixbuf += pixbuf->get_height() / 2 - view.height; + br = c.get_red_p (); + bg = c.get_green_p (); + bb = c.get_blue_p (); + + if ( !_text.empty()) { + _layout->get_pixel_size (_text_width, _text_height); } else { - offset_into_pixbuf += pixbuf->get_width() / 2 - view.width; + _text_width = 0; + _text_height = 0; } + + c = get_style()->get_text (get_state()); + + text_r = c.get_red_p (); + text_g = c.get_green_p (); + text_b = c.get_blue_p (); + + cairo_surface_t* surface; + cairo_t* tc = 0; + float radius = CORNER_RADIUS; + + double w = get_width(); - Glib::RefPtr fg_gc (get_style()->get_fg_gc(get_state())); + if (w <= 1 || get_height() <= 1) { + return; + } - if (gdk_rectangle_intersect (&view, &ev->area, &intersection)) { - if (_orien == VERT) { - srcx = intersection.x; - srcy = offset_into_pixbuf + intersection.y; - } else { - srcx = offset_into_pixbuf + intersection.x; - srcy = intersection.y; - } - get_window()->draw_pixbuf (fg_gc, pixbuf, - srcx, srcy, - intersection.x, intersection.y, - intersection.width, intersection.height, - Gdk::RGB_DITHER_NONE, 0, 0); + 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*0.8,bg*0.8,bb*0.8, 1.0); + cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.6,bg*0.6,bb*0.6, 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 */ - get_window()->draw_line (get_style()->get_bg_gc(STATE_ACTIVE), 0, 0, view.width - 1, 0); /* top */ - get_window()->draw_line (get_style()->get_bg_gc(STATE_ACTIVE), 0, 0, 0, view.height - 1); /* left */ - get_window()->draw_line (get_style()->get_bg_gc(STATE_NORMAL), view.width - 1, 0, view.width - 1, view.height - 1); /* right */ - get_window()->draw_line (get_style()->get_bg_gc(STATE_NORMAL), 0, view.height - 1, view.width - 1, view.height - 1); /* bottom */ + w -= 2.0; + + shade_pattern = cairo_pattern_create_linear (0.0, 0.0, w, 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, 1.0, get_height(), w, get_height(), radius-1.5); + 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*0.8,bg*0.8,bb*0.8, 1.0); + cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.6,bg*0.6,bb*0.6, 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, 0, 1, get_width(), get_height() - 2.0, radius-1.5); + 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); +} + +bool +PixFader::on_expose_event (GdkEventExpose* ev) +{ + Cairo::RefPtr context = get_window()->create_cairo_context(); + cairo_t* cr = context->cobj(); + + if (!pattern) { + create_patterns(); } - /* always draw the line */ + 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. + */ + + Gdk::Color c = get_style()->get_bg (get_state()); + float br, bg, bb; + + br = c.get_red_p (); + bg = c.get_green_p (); + bb = c.get_blue_p (); + cairo_set_source_rgb (cr, br, bg, bb); + cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height); + cairo_fill (cr); + + return true; + } + + cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height); + cairo_clip (cr); + + int ds = display_span (); + float w = get_width(); + float h = get_height(); + + cairo_matrix_t matrix; + if (_orien == VERT) { - get_window()->draw_line (fg_gc, 1, unity_loc, girth - 2, unity_loc); + + if (ds > h - FADER_RESERVE) { + ds = h - FADER_RESERVE; + } + + cairo_set_source (cr, pattern); + cairo_matrix_init_translate (&matrix, 0, (h - ds)); + cairo_pattern_set_matrix (pattern, &matrix); + Gtkmm2ext::rounded_rectangle (cr, 0, 0, w, h, CORNER_RADIUS-1.5); + cairo_fill (cr); + } else { - get_window()->draw_line (fg_gc, unity_loc, 1, unity_loc, girth - 2); + + if (ds < FADER_RESERVE) { + ds = FADER_RESERVE; + } + + /* + 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) + */ + + cairo_set_source (cr, pattern); + cairo_matrix_init_translate (&matrix, w - ds, 0); + cairo_pattern_set_matrix (pattern, &matrix); + Gtkmm2ext::rounded_rectangle (cr, 0, 0, w, h, CORNER_RADIUS-1.5); + cairo_fill (cr); } + + /* draw the unity-position line if it's not at either end*/ + if (unity_loc > 0) { + if ( _orien == VERT) { + if (unity_loc < h ) { + context->set_line_width (1); + context->set_source_rgb (0.0, 1.0, 0.0); + context->move_to (1, unity_loc); + context->line_to (girth - 2.0, unity_loc); + context->stroke (); + } + } else { + if ( unity_loc < w ){ + context->set_line_width (1); + context->set_source_rgb (0.0, 1.0, 0.0); + context->move_to (unity_loc, 1); + context->line_to (unity_loc, girth - 2.0); + context->stroke (); + } + } + } + + if ( !_text.empty() ) { + + /* center text */ + cairo_new_path (cr); + cairo_move_to (cr, (get_width() - _text_width)/2.0, get_height()/2.0 - _text_height/2.0); + cairo_set_source_rgba (cr, text_r, text_g, text_b, 0.9); + pango_cairo_show_layout (cr, _layout->gobj()); + } + +// if (Config->get_widget_prelight()) { //pixfader does not have access to config + if (_hovering) { + Gtkmm2ext::rounded_rectangle (cr, 0, 0, get_width(), get_height(), 3); + cairo_set_source_rgba (cr, 0.905, 0.917, 0.925, 0.1); + cairo_fill (cr); + } +// } + last_drawn = ds; + return true; } void PixFader::on_size_request (GtkRequisition* req) { - req->width = view.width; - req->height = view.height; + if (_orien == VERT) { + req->width = (girth ? girth : -1); + req->height = (span ? span : -1); + } else { + req->height = (girth ? girth : -1); + req->width = (span ? span : -1); + } +} + +void +PixFader::on_size_allocate (Gtk::Allocation& alloc) +{ + DrawingArea::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 (is_realized()) { + /* recreate patterns in case we've changed size */ + create_patterns (); + } + + update_unity_position (); } bool PixFader::on_button_press_event (GdkEventButton* ev) { - switch (ev->button) { - case 1: - case 2: - add_modal_grab(); - grab_loc = (_orien == VERT) ? ev->y : ev->x; - grab_start = (_orien == VERT) ? ev->y : ev->x; - grab_window = ev->window; - dragging = true; - break; - default: - break; - } - + if (ev->type != GDK_BUTTON_PRESS) { + return true; + } - return false; + if (ev->button != 1 && ev->button != 2) { + return false; + } + + add_modal_grab (); + grab_loc = (_orien == VERT) ? ev->y : ev->x; + grab_start = (_orien == VERT) ? ev->y : ev->x; + grab_window = ev->window; + dragging = true; + gdk_pointer_grab(ev->window,false, + GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK), + NULL,NULL,ev->time); + + if (ev->button == 2) { + set_adjustment_from_event (ev); + } + + return true; } bool PixFader::on_button_release_event (GdkEventButton* ev) { - double fract, ev_pos; - - ev_pos = (_orien == VERT) ? ev->y : ev->x; + double const ev_pos = (_orien == VERT) ? ev->y : ev->x; switch (ev->button) { case 1: if (dragging) { remove_modal_grab(); dragging = false; + gdk_pointer_ungrab (GDK_CURRENT_TIME); + + if (!_hovering) { + Keyboard::magic_widget_drop_focus(); + queue_draw (); + } if (ev_pos == grab_start) { @@ -158,16 +388,16 @@ PixFader::on_button_release_event (GdkEventButton* ev) if (ev->state & Keyboard::TertiaryModifier) { adjustment.set_value (default_value); - } else if (ev->state & fine_scale_modifier) { + } else if (ev->state & Keyboard::GainFineScaleModifier) { adjustment.set_value (adjustment.get_lower()); - } else if ((_orien == VERT && ev_pos < span - display_span()) || (_orien == HORIZ && ev_pos > span - display_span())) { + } else if ((_orien == VERT && ev_pos < display_span()) || (_orien == HORIZ && ev_pos > display_span())) { /* above the current display height, remember X Window coords */ adjustment.set_value (adjustment.get_value() + adjustment.get_step_increment()); } else { adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment()); } } - + return true; } break; @@ -175,13 +405,9 @@ PixFader::on_button_release_event (GdkEventButton* ev) if (dragging) { remove_modal_grab(); dragging = false; - - fract = 1.0 - (ev_pos / span); // inverted X Window coordinates, grrr - - fract = min (1.0, fract); - fract = max (0.0, fract); - - adjustment.set_value (fract * (adjustment.get_upper() - adjustment.get_lower())); + set_adjustment_from_event (ev); + gdk_pointer_ungrab (GDK_CURRENT_TIME); + return true; } break; @@ -198,8 +424,8 @@ PixFader::on_scroll_event (GdkEventScroll* ev) double scale; bool ret = false; - if (ev->state & fine_scale_modifier) { - if (ev->state & extra_fine_scale_modifier) { + if (ev->state & Keyboard::GainFineScaleModifier) { + if (ev->state & Keyboard::GainExtraFineScaleModifier) { scale = 0.01; } else { scale = 0.05; @@ -254,29 +480,27 @@ bool PixFader::on_motion_notify_event (GdkEventMotion* ev) { if (dragging) { - double fract, delta, scale, ev_pos; - ev_pos = (_orien == VERT) ? ev->y : ev->x; - //cerr << "PixFader::on_motion_notify_event() called x:y = " << ev->x << ":" << ev->y; + 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 & fine_scale_modifier) { - if (ev->state & extra_fine_scale_modifier) { + if (ev->state & Keyboard::GainFineScaleModifier) { + if (ev->state & Keyboard::GainExtraFineScaleModifier) { scale = 0.05; } else { scale = 0.1; } - } else { - scale = 1.0; } - //cerr << " ev_pos=" << ev_pos << " grab_loc=" << grab_loc; - delta = ev_pos - grab_loc; + + double const delta = ev_pos - grab_loc; grab_loc = ev_pos; - fract = (delta / span); + double fract = (delta / span); fract = min (1.0, fract); fract = max (-1.0, fract); @@ -288,7 +512,6 @@ PixFader::on_motion_notify_event (GdkEventMotion* ev) } adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower())); - //cerr << " adj=" << adjustment.get_value() << " fract=" << fract << " delta=" << delta << " scale=" << scale << endl; } return true; @@ -306,19 +529,24 @@ PixFader::adjustment_changed () int PixFader::display_span () { - float fract = (adjustment.get_upper() - adjustment.get_value ()) / ((adjustment.get_upper() - adjustment.get_lower())); - return (_orien == VERT) ? (int)floor (span * (1.0 - fract)) : (int)floor (span * fract); + float fract = (adjustment.get_value () - adjustment.get_lower()) / ((adjustment.get_upper() - adjustment.get_lower())); + int ds; + if (_orien == VERT) { + ds = (int)floor ( span * (1.0 - fract)); + } else { + ds = (int)floor (span * fract); + } + + return ds; } void -PixFader::set_fader_length (int l) +PixFader::update_unity_position () { if (_orien == VERT) { - view.height = span = l; - unity_loc = (int) rint (view.height - (default_value * view.height)) - 1; + unity_loc = (int) rint (span * (1 - (default_value / (adjustment.get_upper() - adjustment.get_lower())))) - 1; } else { - view.width = span = l; - unity_loc = (int) rint (default_value * view.width) - 1; + unity_loc = (int) rint (default_value * span / (adjustment.get_upper() - adjustment.get_lower())); } queue_draw (); @@ -327,13 +555,77 @@ PixFader::set_fader_length (int l) bool PixFader::on_enter_notify_event (GdkEventCrossing*) { + _hovering = true; Keyboard::magic_widget_grab_focus (); + queue_draw (); return false; } bool PixFader::on_leave_notify_event (GdkEventCrossing*) { - Keyboard::magic_widget_drop_focus(); + if (!dragging) { + _hovering = false; + Keyboard::magic_widget_drop_focus(); + queue_draw (); + } return false; } + +void +PixFader::set_adjustment_from_event (GdkEventButton* ev) +{ + double fract = (_orien == VERT) ? (1.0 - (ev->y / span)) : (ev->x / span); + + fract = min (1.0, fract); + fract = max (0.0, fract); + + adjustment.set_value (fract * (adjustment.get_upper () - adjustment.get_lower ())); +} + +void +PixFader::set_default_value (float d) +{ + default_value = d; + update_unity_position (); +} + +void +PixFader::set_text (const std::string& str) +{ + _text = str; + + if (!_layout && !_text.empty()) { + _layout = Pango::Layout::create (get_pango_context()); + } + + if (_layout) { + _layout->set_text (str); + _layout->get_pixel_size (_text_width, _text_height); + } + + queue_resize (); +} + +void +PixFader::on_state_changed (Gtk::StateType old_state) +{ + Widget::on_state_changed (old_state); + create_patterns (); +} + +void +PixFader::on_style_changed (const Glib::RefPtr&) +{ + if (_layout) { + std::string txt = _layout->get_text(); + _layout.clear (); // drop reference to existing layout + set_text (txt); + } + + /* remember that all patterns are cached and not owned by an individual + pixfader. we will lazily create a new pattern when needed. + */ + + pattern = 0; +}