git-svn-id: svn://localhost/ardour2/branches/3.0@9676 d708f5d6-7413-0410-9779-e7cbd77b26cf
362 lines
7.2 KiB
C++
362 lines
7.2 KiB
C++
/*
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Copyright (C) 2011 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <algorithm>
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#include <cmath>
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#include <iostream>
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#include "gtkmm2ext/cairocell.h"
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#include "gtkmm2ext/utils.h"
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using std::string;
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using std::map;
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using std::cerr;
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using std::endl;
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using namespace Gtkmm2ext;
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CairoCell::CairoCell (int32_t id)
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: _id (id)
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, _visible (true)
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, _xpad (2)
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{
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bbox.x = 0;
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bbox.y = 0;
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bbox.width = 0;
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bbox.height = 0;
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}
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void
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CairoColonCell::render (Cairo::RefPtr<Cairo::Context>& context)
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{
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/* two very small circles */
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context->arc (bbox.x, bbox.y + (bbox.height/3.0), bbox.width/2.0, 0.0, M_PI*2.0);
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context->fill ();
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context->arc (bbox.x, bbox.y + (2.0 * bbox.height/3.0), bbox.width/2.0, 0.0, M_PI*2.0);
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context->fill ();
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}
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void
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CairoColonCell::set_size (Glib::RefPtr<Pango::Context>& context, const Pango::FontDescription& font)
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{
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Pango::FontMetrics metrics = context->get_metrics (font);
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bbox.width = std::max (3.0, (0.25 * metrics.get_approximate_char_width() / PANGO_SCALE));
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bbox.height = (metrics.get_ascent() + metrics.get_descent()) / PANGO_SCALE;
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}
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CairoTextCell::CairoTextCell (int32_t id, double wc)
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: CairoCell (id)
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, _width_chars (wc)
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{
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}
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void
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CairoTextCell::set_text (const std::string& txt)
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{
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layout->set_text (txt);
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}
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void
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CairoTextCell::render (Cairo::RefPtr<Cairo::Context>& context)
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{
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if (!_visible || _width_chars == 0) {
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return;
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}
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context->move_to (bbox.x, bbox.y);
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pango_cairo_update_layout (context->cobj(), layout->gobj());
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pango_cairo_show_layout (context->cobj(), layout->gobj());
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}
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void
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CairoTextCell::set_size (Glib::RefPtr<Pango::Context>& context, const Pango::FontDescription& font)
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{
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if (!layout) {
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layout = Pango::Layout::create (context);
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}
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layout->set_font_description (font);
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Pango::FontMetrics metrics = context->get_metrics (font);
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bbox.width = (_width_chars * metrics.get_approximate_digit_width ()) / PANGO_SCALE;
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bbox.height = (metrics.get_ascent() + metrics.get_descent()) / PANGO_SCALE;
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}
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CairoEditableText::CairoEditableText ()
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: editing_cell (0)
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, _draw_bg (true)
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, width (0)
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, max_cell_height (0)
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, height (0)
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, _corner_radius (9)
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, _xpad (5)
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, _ypad (5)
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{
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add_events (Gdk::POINTER_MOTION_HINT_MASK | Gdk::SCROLL_MASK | Gdk::KEY_PRESS_MASK | Gdk::KEY_RELEASE_MASK |
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Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK | Gdk::SCROLL_MASK);
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set_flags (Gtk::CAN_FOCUS);
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set_can_default (true);
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set_receives_default (true);
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}
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CairoEditableText::~CairoEditableText ()
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{
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/* we don't own cells */
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}
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bool
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CairoEditableText::on_scroll_event (GdkEventScroll* ev)
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{
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CairoCell* cell = find_cell (ev->x, ev->y);
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if (cell) {
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return scroll (ev, cell);
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}
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return false;
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}
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bool
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CairoEditableText::on_focus_in_event (GdkEventFocus* ev)
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{
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return false;
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}
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bool
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CairoEditableText::on_focus_out_event (GdkEventFocus* ev)
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{
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if (editing_cell) {
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queue_draw_cell (editing_cell);
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editing_cell = 0;
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}
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return false;
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}
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void
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CairoEditableText::add_cell (CairoCell* cell)
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{
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Glib::RefPtr<Pango::Context> context = get_pango_context ();
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cell->set_size (context, _font);
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cells.push_back (cell);
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queue_resize ();
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queue_draw ();
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}
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void
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CairoEditableText::clear_cells ()
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{
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cells.clear ();
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queue_resize ();
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queue_draw ();
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}
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void
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CairoEditableText::set_width_chars (CairoTextCell* cell, uint32_t wc)
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{
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if (cell) {
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cell->set_width_chars (wc);
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queue_resize ();
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}
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}
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void
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CairoEditableText::set_text (CairoTextCell* cell, const string& text)
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{
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cell->set_text (text);
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queue_draw_cell (cell);
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}
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bool
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CairoEditableText::on_expose_event (GdkEventExpose* ev)
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{
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Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
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if (cells.empty()) {
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return true;
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}
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context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
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context->clip ();
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if (_draw_bg) {
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context->set_source_rgba (bg_r, bg_g, bg_b, bg_a);
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if (_corner_radius) {
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rounded_rectangle (context, 0, 0, width, height, _corner_radius);
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} else {
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context->rectangle (0, 0, width, height);
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}
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context->fill ();
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}
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for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
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CairoCell* cell = (*i);
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/* is cell inside the expose area?
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*/
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if (cell->intersects (ev->area)) {
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if (cell == editing_cell) {
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context->set_source_rgba (edit_r, edit_b, edit_g, edit_a);
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} else {
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context->set_source_rgba (r, g, b, a);
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}
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cell->render (context);
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}
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}
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return true;
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}
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void
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CairoEditableText::queue_draw_cell (CairoCell* cell)
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{
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Glib::RefPtr<Gdk::Window> win = get_window();
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if (!win) {
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return;
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}
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Gdk::Rectangle r;
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r.set_x (cell->x());
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r.set_y (cell->y());
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r.set_width (cell->width());
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r.set_height (cell->height());
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Gdk::Region rg (r);
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win->invalidate_region (rg, true);
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}
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CairoCell*
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CairoEditableText::find_cell (uint32_t x, uint32_t y)
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{
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for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
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if ((*i)->covers (x, y)) {
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return (*i);
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}
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}
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return 0;
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}
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bool
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CairoEditableText::on_button_press_event (GdkEventButton* ev)
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{
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CairoCell* cell = find_cell (ev->x, ev->y);
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return button_press (ev, cell);
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}
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bool
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CairoEditableText::on_button_release_event (GdkEventButton* ev)
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{
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CairoCell* cell = find_cell (ev->x, ev->y);
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return button_release (ev, cell);
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}
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void
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CairoEditableText::start_editing (CairoCell* cell)
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{
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stop_editing ();
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if (cell) {
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editing_cell = cell;
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queue_draw_cell (cell);
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grab_focus ();
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}
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}
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void
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CairoEditableText::stop_editing ()
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{
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if (editing_cell) {
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queue_draw_cell (editing_cell);
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editing_cell = 0;
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}
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}
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void
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CairoEditableText::on_size_request (GtkRequisition* req)
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{
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double x = 0;
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max_cell_height = 0;
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x = _xpad;
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CellMap::iterator i = cells.begin();
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while (i != cells.end()) {
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CairoCell* cell = (*i);
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if (cell->visible()) {
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cell->set_position (x, _ypad);
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}
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x += cell->width();
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max_cell_height = std::max ((double) cell->height(), max_cell_height);
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++i;
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if (i != cells.end()) {
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/* only add cell padding intra-cellularly */
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x += cell->xpad();
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} else {
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break;
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}
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}
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x += _xpad;
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req->width = x;
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req->height = max_cell_height + (_ypad * 2);
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}
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void
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CairoEditableText::on_size_allocate (Gtk::Allocation& alloc)
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{
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Misc::on_size_allocate (alloc);
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width = alloc.get_width();
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height = alloc.get_height();
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}
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void
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CairoEditableText::set_font (const std::string& str)
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{
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set_font (Pango::FontDescription (str));
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}
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void
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CairoEditableText::set_font (const Pango::FontDescription& fd)
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{
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Glib::RefPtr<Pango::Context> context = get_pango_context ();
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_font = fd;
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for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
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(*i)->set_size (context, _font);
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}
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queue_resize ();
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queue_draw ();
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}
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