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-rw-r--r--libs/gtkmm2ext/pixfader.cc745
1 files changed, 0 insertions, 745 deletions
diff --git a/libs/gtkmm2ext/pixfader.cc b/libs/gtkmm2ext/pixfader.cc
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index 23510e824e..0000000000
--- a/libs/gtkmm2ext/pixfader.cc
+++ /dev/null
@@ -1,745 +0,0 @@
-/*
- 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
- 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.
-
- $Id: fastmeter.h 570 2006-06-07 21:21:21Z sampo $
-*/
-
-
-#include <iostream>
-#include <assert.h>
-
-#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 std;
-
-#define CORNER_RADIUS 2.5
-#define CORNER_SIZE 2
-#define CORNER_OFFSET 1
-#define FADER_RESERVE 6
-
-std::list<PixFader::FaderImage*> 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)
-{
- _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);
- }
-}
-
-PixFader::~PixFader ()
-{
- if (_parent_style_change) _parent_style_change.disconnect();
- if (_layout) _layout.clear (); // drop reference to existing layout
-}
-
-void
-PixFader::flush_pattern_cache () {
- for (list<FaderImage*>::iterator f = _patterns.begin(); f != _patterns.end(); ++f) {
- cairo_pattern_destroy ((*f)->pattern);
- }
- _patterns.clear();
-}
-
-
-cairo_pattern_t*
-PixFader::find_pattern (double afr, double afg, double afb,
- double abr, double abg, double abb,
- int w, int h)
-{
- for (list<FaderImage*>::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;
-
- 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);
-}
-
-void
-PixFader::render (Cairo::RefPtr<Cairo::Context> 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, get_style()->get_bg (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);
- 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)
-{
- 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)
-{
- 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;
- }
-
- 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 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);
- StopGesture ();
-
- if (!_hovering) {
- if (!(_tweaks & NoVerticalScroll)) {
- Keyboard::magic_widget_drop_focus();
- }
- queue_draw ();
- }
-
- if (ev_pos == _grab_start) {
- /* no motion - just a click */
- 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());
- } else {
- _adjustment.set_value (_adjustment.get_value() - _adjustment.get_step_increment());
-#endif
- }
- }
- return true;
- }
- break;
-
- case 2:
- if (_dragging) {
- remove_modal_grab();
- _dragging = false;
- StopGesture ();
- set_adjustment_from_event (ev);
- gdk_pointer_ungrab (GDK_CURRENT_TIME);
- return true;
- }
- break;
-
- default:
- break;
- }
- return false;
-}
-
-bool
-PixFader::on_scroll_event (GdkEventScroll* ev)
-{
- double scale;
- bool ret = false;
-
- if (ev->state & Keyboard::GainFineScaleModifier) {
- if (ev->state & Keyboard::GainExtraFineScaleModifier) {
- scale = 0.005;
- } else {
- scale = 0.1;
- }
- } else {
- scale = 1.0;
- }
-
- 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;
-
- 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 ret;
-}
-
-bool
-PixFader::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;
-}
-
-void
-PixFader::adjustment_changed ()
-{
- 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;
-}
-
-void
-PixFader::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
-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<Gtk::Style>&)
-{
- 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());
-}