X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fgtkmm2ext%2Fpixfader.cc;h=64ee449646e5f310d824258bccd61a29d6150933;hb=e16141c9aa87714e2e4e9357d0a60f8eb3e22faf;hp=f3a40ffc69eaaa0f6ee82da8296b11017b51bcee;hpb=e002eea388f9850cc5d416c70a87ffae1929b1f7;p=ardour.git diff --git a/libs/gtkmm2ext/pixfader.cc b/libs/gtkmm2ext/pixfader.cc index f3a40ffc69..64ee449646 100644 --- a/libs/gtkmm2ext/pixfader.cc +++ b/libs/gtkmm2ext/pixfader.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2006 Paul Davis + Copyright (C) 2006 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 @@ -20,143 +20,466 @@ #include -#include +#include + +#include "pbd/stacktrace.h" + +#include "gtkmm2ext/cairo_widget.h" +#include "gtkmm2ext/keyboard.h" +#include "gtkmm2ext/pixfader.h" +#include "gtkmm2ext/utils.h" using namespace Gtkmm2ext; using namespace Gtk; -using namespace Gdk; using namespace std; -PixFader::PixFader (Glib::RefPtr belt, Gtk::Adjustment& adj) - : adjustment (adj), - pixbuf (belt) +#define CORNER_RADIUS 2.5 +#define CORNER_SIZE 2 +#define CORNER_OFFSET 1 +#define FADER_RESERVE 6 + +std::list PixFader::_patterns; + +PixFader::PixFader (Gtk::Adjustment& adj, int orientation, int fader_length, int fader_girth) + : _layout (0) + , _tweaks (Tweaks(0)) + , _adjustment (adj) + , _text_width (0) + , _text_height (0) + , _span (fader_length) + , _girth (fader_girth) + , _min_span (fader_length) + , _min_girth (fader_girth) + , _orien (orientation) + , _pattern (0) + , _hovering (false) + , _dragging (false) + , _centered_text (true) + , _current_parent (0) { - dragging = false; - default_value = adjustment.get_value(); - last_drawn = -1; - pixheight = pixbuf->get_height(); + _default_value = _adjustment.get_value(); + 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 + ); + + _adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed)); + _adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed)); + signal_grab_broken_event ().connect (mem_fun (*this, &PixFader::on_grab_broken_event)); + if (_orien == VERT) { + CairoWidget::set_size_request(_girth, _span); + } else { + CairoWidget::set_size_request(_span, _girth); + } +} - view.x = 0; - view.y = 0; - view.width = pixbuf->get_width(); - view.height = pixheight / 2; +PixFader::~PixFader () +{ + if (_parent_style_change) _parent_style_change.disconnect(); + if (_layout) _layout.clear (); // drop reference to existing layout +} - unity_y = (int) rint (view.height - (default_value * view.height)) - 1; +void +PixFader::flush_pattern_cache () { + for (list::iterator f = _patterns.begin(); f != _patterns.end(); ++f) { + cairo_pattern_destroy ((*f)->pattern); + } + _patterns.clear(); +} - add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK); - adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed)); - adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed)); +cairo_pattern_t* +PixFader::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; } -PixFader::~PixFader () +void +PixFader::create_patterns () { + Gdk::Color c = get_style()->get_fg (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 = get_style()->get_bg (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); } -bool -PixFader::on_expose_event (GdkEventExpose* ev) +void +PixFader::render (cairo_t *cr, cairo_rectangle_t* area) { - GdkRectangle intersection; - int dh = display_height (); - int offset_into_pixbuf = (int) floor (view.height / ((float) view.height / dh)); - Glib::RefPtr fg_gc (get_style()->get_fg_gc(get_state())); + if (!_pattern) { + create_patterns(); + } - if (gdk_rectangle_intersect (&view, &ev->area, &intersection)) { - get_window()->draw_pixbuf (fg_gc, pixbuf, - intersection.x, offset_into_pixbuf + intersection.y, - intersection.x, intersection.y, - intersection.width, intersection.height, - Gdk::RGB_DITHER_NONE, 0, 0); - - 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 */ + 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, get_style()->get_bg (get_state()), 1); + cairo_rectangle (cr, area->x, area->y, area->width, area->height); + cairo_fill (cr); + return; } - /* always draw the line */ + OnExpose(); + int ds = display_span (); + const float w = get_width(); + const float h = get_height(); - get_window()->draw_line (fg_gc, 1, unity_y, view.width - 2, unity_y); + CairoWidget::set_source_rgb_a (cr, get_parent_bg(), 1); + cairo_rectangle (cr, 0, 0, w, h); + cairo_fill(cr); - last_drawn = dh; - return true; + cairo_set_line_width (cr, 2); + cairo_set_source_rgba (cr, 0, 0, 0, 1.0); + + 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, get_style()->get_bg (get_state()), 1); + cairo_fill (cr); + CairoWidget::set_source_rgb_a (cr, get_style()->get_fg (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, get_style()->get_bg (get_state()), 1); + cairo_fill (cr); + CairoWidget::set_source_rgb_a (cr, get_style()->get_fg (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 = get_style()->get_fg (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) { + cairo_save (cr); + if (_centered_text) { + /* center text */ + cairo_move_to (cr, (w - _text_width)/2.0, h/2.0 - _text_height/2.0); + } else if (ds > .5 * w) { + cairo_move_to (cr, CORNER_OFFSET + 3, h/2.0 - _text_height/2.0); + cairo_set_operator(cr, CAIRO_OPERATOR_XOR); + } else { + cairo_move_to (cr, w - _text_width - CORNER_OFFSET - 3, h/2.0 - _text_height/2.0); + } + CairoWidget::set_source_rgb_a (cr, get_style()->get_text (get_state()), 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()) { + 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 PixFader::on_size_request (GtkRequisition* req) { - req->width = view.width; - req->height = view.height; + 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 +PixFader::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 (is_realized() && ((old_girth != _girth) || (old_span != _span))) { + /* recreate patterns in case we've changed size */ + create_patterns (); + } + + update_unity_position (); +} + +bool +PixFader::on_grab_broken_event (GdkEventGrabBroken* ev) +{ + if (_dragging) { + remove_modal_grab(); + _dragging = false; + gdk_pointer_ungrab (GDK_CURRENT_TIME); + StopGesture (); + } + return (_tweaks & NoButtonForward) ? true : false; } bool PixFader::on_button_press_event (GdkEventButton* ev) { - switch (ev->button) { - case 1: - case 2: - add_modal_grab(); - grab_y = ev->y; - grab_start = ev->y; - grab_window = ev->window; - dragging = true; - break; - default: - break; - } - + if (ev->type != GDK_BUTTON_PRESS) { + if (_dragging) { + remove_modal_grab(); + _dragging = false; + gdk_pointer_ungrab (GDK_CURRENT_TIME); + StopGesture (); + } + return (_tweaks & NoButtonForward) ? true : false; + } - return false; + if (ev->button != 1 && ev->button != 2) { + return false; + } + + add_modal_grab (); + StartGesture (); + _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 (_tweaks & NoButtonForward) ? true : false; } bool PixFader::on_button_release_event (GdkEventButton* ev) { - double fract; - + double ev_pos = (_orien == VERT) ? ev->y : ev->x; + switch (ev->button) { case 1: - if (dragging) { + if (_dragging) { remove_modal_grab(); - dragging = false; + _dragging = false; + gdk_pointer_ungrab (GDK_CURRENT_TIME); + StopGesture (); - if (ev->y == grab_start) { + if (!_hovering) { + if (!(_tweaks & NoVerticalScroll)) { + Keyboard::magic_widget_drop_focus(); + } + queue_draw (); + } + if (ev_pos == _grab_start) { /* no motion - just a click */ - - if (ev->state & Gdk::SHIFT_MASK) { - adjustment.set_value (default_value); - } else if (ev->state & GDK_CONTROL_MASK) { - adjustment.set_value (adjustment.get_lower()); - } else if (ev->y < view.height - display_height()) { + ev_pos = rint(ev_pos); + + if (ev->state & Keyboard::TertiaryModifier) { + _adjustment.set_value (_default_value); + } else if (ev->state & Keyboard::GainFineScaleModifier) { + _adjustment.set_value (_adjustment.get_lower()); +#if 0 // ignore clicks + } else if (ev_pos == slider_pos) { + ; // click on current position, no move. + } else if ((_orien == VERT && ev_pos < slider_pos) || (_orien == HORIZ && ev_pos > slider_pos)) { /* above the current display height, remember X Window coords */ - adjustment.set_value (adjustment.get_value() + adjustment.get_step_increment()); + _adjustment.set_value (_adjustment.get_value() + _adjustment.get_step_increment()); } else { - adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment()); + _adjustment.set_value (_adjustment.get_value() - _adjustment.get_step_increment()); +#endif } } - - } + return true; + } break; - + case 2: - if (dragging) { + if (_dragging) { remove_modal_grab(); - dragging = false; - - fract = 1.0 - (ev->y / view.height); // 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())); + _dragging = false; + StopGesture (); + set_adjustment_from_event (ev); + gdk_pointer_ungrab (GDK_CURRENT_TIME); + return true; } break; default: break; } - return false; } @@ -164,70 +487,93 @@ bool PixFader::on_scroll_event (GdkEventScroll* ev) { double scale; - - if (ev->state & GDK_CONTROL_MASK) { - if (ev->state & GDK_MOD1_MASK) { - scale = 0.05; + bool ret = false; + + if (ev->state & Keyboard::GainFineScaleModifier) { + if (ev->state & Keyboard::GainExtraFineScaleModifier) { + scale = 0.005; } else { scale = 0.1; } } else { - scale = 0.5; + scale = 1.0; } - switch (ev->direction) { + if (_orien == VERT) { + switch (ev->direction) { + case GDK_SCROLL_UP: + _adjustment.set_value (_adjustment.get_value() + (_adjustment.get_page_increment() * scale)); + ret = true; + break; + case GDK_SCROLL_DOWN: + _adjustment.set_value (_adjustment.get_value() - (_adjustment.get_page_increment() * scale)); + ret = true; + break; + default: + break; + } + } else { + int dir = ev->direction; - case GDK_SCROLL_UP: - /* wheel up */ - adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale)); - break; - case GDK_SCROLL_DOWN: - /* wheel down */ - adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale)); - break; - default: - break; + if (ev->state & Keyboard::ScrollHorizontalModifier || !(_tweaks & NoVerticalScroll)) { + if (ev->direction == GDK_SCROLL_UP) dir = GDK_SCROLL_RIGHT; + if (ev->direction == GDK_SCROLL_DOWN) dir = GDK_SCROLL_LEFT; + } + + switch (dir) { + case GDK_SCROLL_RIGHT: + _adjustment.set_value (_adjustment.get_value() + (_adjustment.get_page_increment() * scale)); + ret = true; + break; + case GDK_SCROLL_LEFT: + _adjustment.set_value (_adjustment.get_value() - (_adjustment.get_page_increment() * scale)); + ret = true; + break; + default: + break; + } } - return false; + return ret; } bool PixFader::on_motion_notify_event (GdkEventMotion* ev) { - if (dragging) { - double fract; - double delta; - double scale; + if (_dragging) { + double scale = 1.0; + double const ev_pos = (_orien == VERT) ? ev->y : ev->x; - if (ev->window != grab_window) { - grab_y = ev->y; - grab_window = ev->window; + if (ev->window != _grab_window) { + _grab_loc = ev_pos; + _grab_window = ev->window; return true; } - - if (ev->state & GDK_CONTROL_MASK) { - if (ev->state & GDK_MOD1_MASK) { - scale = 0.05; + + if (ev->state & Keyboard::GainFineScaleModifier) { + if (ev->state & Keyboard::GainExtraFineScaleModifier) { + scale = 0.005; } else { scale = 0.1; } - } else { - scale = 1.0; } - delta = ev->y - grab_y; - grab_y = ev->y; + double const delta = ev_pos - _grab_loc; + _grab_loc = ev_pos; - fract = (delta / view.height); + 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 - - fract = -fract; - adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower())); + if (_orien == VERT) { + fract = -fract; + } + + _adjustment.set_value (_adjustment.get_value() + scale * fract * (_adjustment.get_upper() - _adjustment.get_lower())); } return true; @@ -236,14 +582,162 @@ PixFader::on_motion_notify_event (GdkEventMotion* ev) void PixFader::adjustment_changed () { - if (display_height() != last_drawn) { + queue_draw (); +} + +/** @return pixel offset of the current value from the right or bottom of the fader */ +int +PixFader::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 +PixFader::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 (); +} + +bool +PixFader::on_enter_notify_event (GdkEventCrossing*) +{ + _hovering = true; + if (!(_tweaks & NoVerticalScroll)) { + Keyboard::magic_widget_grab_focus (); + } + queue_draw (); + return false; +} + +bool +PixFader::on_leave_notify_event (GdkEventCrossing*) +{ + if (!_dragging) { + _hovering = false; + if (!(_tweaks & NoVerticalScroll)) { + Keyboard::magic_widget_drop_focus(); + } queue_draw (); } + return false; } -int -PixFader::display_height () +void +PixFader::set_adjustment_from_event (GdkEventButton* ev) { - float fract = (adjustment.get_upper() - adjustment.get_value ()) / ((adjustment.get_upper() - adjustment.get_lower())); - return (int) floor (view.height * (1.0 - fract)); + 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 +PixFader::set_default_value (float d) +{ + _default_value = d; + update_unity_position (); +} + +void +PixFader::set_tweaks (Tweaks t) +{ + bool need_redraw = false; + if ((_tweaks & NoShowUnityLine) ^ (t & NoShowUnityLine)) { + need_redraw = true; + } + _tweaks = t; + if (need_redraw) { + queue_draw(); + } +} + +void +PixFader::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 +PixFader::on_state_changed (Gtk::StateType old_state) +{ + Widget::on_state_changed (old_state); + create_patterns (); + queue_draw (); +} + +void +PixFader::on_style_changed (const Glib::RefPtr&) +{ + if (_layout) { + std::string txt = _layout->get_text(); + _layout.clear (); // drop reference to existing layout + _text = ""; + set_text (txt, _centered_text, false); + } + /* patterns are cached and re-created as needed + * during 'expose' in the GUI thread */ + _pattern = 0; + queue_draw (); +} + +Gdk::Color +PixFader::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, &PixFader::on_style_changed)); + } + return parent->get_style ()->get_bg (parent->get_state()); + } + + return get_style ()->get_bg (get_state()); }