new CairoCell and related classes designed for drawing audio clocks more efficiently etc. etc.
git-svn-id: svn://localhost/ardour2/branches/3.0@9651 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
parent
8dedb6c38a
commit
a46cea06e2
429
libs/gtkmm2ext/cairocell.cc
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429
libs/gtkmm2ext/cairocell.cc
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@ -0,0 +1,429 @@
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/*
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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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||||
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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
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
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 "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 namespace Gtkmm2ext;
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CairoCell::CairoCell ()
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: _visible (true)
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, _xpad (5)
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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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CairoTextCell::CairoTextCell (uint32_t wc)
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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::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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layout = Pango::Layout::create (context);
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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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CairoCell*
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CairoEditableText::get_cell (uint32_t id)
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{
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CellMap::iterator i = cells.find (id);
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if (i == cells.end()) {
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return 0;
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}
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return i->second;
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}
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CairoEditableText::CairoEditableText ()
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: editing_id (0)
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, editing_pos (0)
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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 (24)
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, xpad (10)
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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);
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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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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_id) {
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CairoCell* cell = get_cell (editing_id);
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queue_draw_cell (cell);
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editing_id = 0;
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editing_pos = 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 (uint32_t id, CairoCell* cell)
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{
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if (id > 0) {
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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[id] = cell; /* we own it */
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}
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}
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void
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CairoEditableText::set_text (uint32_t id, const string& text)
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{
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CellMap::iterator i = cells.find (id);
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if (i == cells.end()) {
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return;
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}
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CairoTextCell* textcell = dynamic_cast<CairoTextCell*> (i->second);
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if (textcell) {
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set_text (textcell, text);
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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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context->set_source_rgba (bg_r, bg_g, bg_b, bg_a);
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rounded_rectangle (context, 0, 0, width, height, corner_radius);
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context->fill ();
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for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
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uint32_t id = i->first;
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CairoCell* cell = i->second;
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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 (id == editing_id) {
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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, uint32_t& id)
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{
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for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
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if (i->second->covers (x, y)) {
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id = i->first;
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return i->second;
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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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uint32_t id;
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CairoCell* cell;
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if (editing_id) {
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cell = get_cell (editing_id);
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/* redraw the old cell */
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queue_draw_cell (cell);
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}
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cell = find_cell (ev->x, ev->y, id);
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if (!cell) {
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editing_id = 0;
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return false;
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}
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grab_focus ();
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editing_id = id;
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editing_pos = 0;
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/* redraw the new cell (maybe the same as the old - no real cost) */
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queue_draw_cell (cell);
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return true;
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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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return true;
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}
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bool
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CairoEditableText::on_key_press_event (GdkEventKey* ev)
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{
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if (!editing_id) {
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return true;
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}
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bool commit_change = false;
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CairoCell* cell = get_cell (editing_id);
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if (!cell) {
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return true;
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}
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CairoTextCell* text_cell = dynamic_cast<CairoTextCell*> (cell);
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if (!text_cell) {
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return true;
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}
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string txt = text_cell->get_text ();
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switch (ev->keyval) {
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case GDK_Tab:
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queue_draw_cell (cell);
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edit_next_cell ();
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break;
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case GDK_0:
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case GDK_KP_0:
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txt[editing_pos] = '0';
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commit_change = true;
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break;
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case GDK_1:
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case GDK_KP_1:
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txt[editing_pos] = '1';
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commit_change = true;
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break;
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case GDK_2:
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case GDK_KP_2:
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txt[editing_pos] = '2';
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commit_change = true;
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break;
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case GDK_3:
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case GDK_KP_3:
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txt[editing_pos] = '3';
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commit_change = true;
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break;
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case GDK_4:
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case GDK_KP_4:
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txt[editing_pos] = '4';
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commit_change = true;
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break;
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case GDK_5:
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case GDK_KP_5:
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txt[editing_pos] = '5';
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commit_change = true;
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break;
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case GDK_6:
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case GDK_KP_6:
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txt[editing_pos] = '6';
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commit_change = true;
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break;
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case GDK_7:
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case GDK_KP_7:
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txt[editing_pos] = '7';
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commit_change = true;
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break;
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case GDK_8:
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case GDK_KP_8:
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txt[editing_pos] = '8';
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commit_change = true;
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break;
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case GDK_9:
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case GDK_KP_9:
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txt[editing_pos] = '9';
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commit_change = true;
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break;
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case GDK_Right:
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if (editing_pos < text_cell->width_chars() - 1) {
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editing_pos++;
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}
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break;
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case GDK_Left:
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if (editing_pos > 0) {
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editing_pos--;
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}
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break;
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default:
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break;
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}
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if (commit_change) {
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set_text (text_cell, txt);
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if (++editing_pos >= text_cell->width_chars()) {
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edit_next_cell ();
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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::edit_next_cell ()
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{
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CairoCell* next;
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CairoTextCell* next_text;
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uint32_t next_id = editing_id + 1;
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while (true) {
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next = get_cell (next_id);
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if (!next || !next->visible() || (next_text = dynamic_cast<CairoTextCell*> (next)) != 0) {
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break;
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}
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next_id += 1;
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}
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if (next) {
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editing_id = next_id;
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editing_pos = 0;
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queue_draw_cell (next_text);
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} else {
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editing_id = 0;
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editing_pos = 0;
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}
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}
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bool
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CairoEditableText::on_key_release_event (GdkEventKey* ev)
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{
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return true;
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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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for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
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CairoCell* cell = i->second;
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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() + cell->xpad();
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max_cell_height = std::max ((double) cell->height(), max_cell_height);
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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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214
libs/gtkmm2ext/gtkmm2ext/cairocell.h
Normal file
214
libs/gtkmm2ext/gtkmm2ext/cairocell.h
Normal file
@ -0,0 +1,214 @@
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/*
|
||||
Copyright (C) 2011 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.
|
||||
|
||||
*/
|
||||
|
||||
#ifndef __libgtmm2ext_cairocell_h__
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#define __libgtmm2ext_cairocell_h__
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#include <map>
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#include <stdint.h>
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#include <cairomm/cairomm.h>
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#include <gtkmm.h>
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|
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class CairoCell
|
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{
|
||||
public:
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CairoCell();
|
||||
virtual ~CairoCell() {}
|
||||
|
||||
virtual void render (Cairo::RefPtr<Cairo::Context>&) = 0;
|
||||
|
||||
double x() const { return bbox.x; }
|
||||
double y() const { return bbox.y; }
|
||||
double width() const { return bbox.width; }
|
||||
double height() const { return bbox.height; }
|
||||
|
||||
void set_position (double x, double y) {
|
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bbox.x = x;
|
||||
bbox.y = y;
|
||||
}
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||||
|
||||
bool intersects (GdkRectangle& r) const {
|
||||
return gdk_rectangle_intersect (&r, &bbox, 0);
|
||||
}
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||||
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||||
bool covers (double x, double y) const {
|
||||
return bbox.x <= x && bbox.x + bbox.width > x &&
|
||||
bbox.y <= y && bbox.y + bbox.height > y;
|
||||
}
|
||||
|
||||
double xpad() const { return _xpad; }
|
||||
void set_xpad (double x) { _xpad = x; }
|
||||
|
||||
void set_visible (bool yn) { _visible = yn; }
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||||
bool visible() const { return _visible; }
|
||||
virtual void set_size (Glib::RefPtr<Pango::Context>&, const Pango::FontDescription&) {}
|
||||
|
||||
protected:
|
||||
GdkRectangle bbox;
|
||||
bool _visible;
|
||||
uint32_t _xpad;
|
||||
};
|
||||
|
||||
class CairoBarCell : public CairoCell
|
||||
{
|
||||
public:
|
||||
CairoBarCell() {};
|
||||
|
||||
void render (Cairo::RefPtr<Cairo::Context>& context) {
|
||||
context->move_to (bbox.x, bbox.y);
|
||||
context->set_line_width (bbox.width);
|
||||
context->rel_line_to (0, bbox.height);
|
||||
context->stroke ();
|
||||
}
|
||||
|
||||
void set_size (Glib::RefPtr<Pango::Context>& context, const Pango::FontDescription& font) {
|
||||
Pango::FontMetrics metrics = context->get_metrics (font);
|
||||
bbox.width = 2;
|
||||
bbox.height = (metrics.get_ascent() + metrics.get_descent()) / PANGO_SCALE;
|
||||
}
|
||||
|
||||
private:
|
||||
};
|
||||
|
||||
class CairoColonCell : public CairoCell
|
||||
{
|
||||
public:
|
||||
CairoColonCell() {};
|
||||
|
||||
void render (Cairo::RefPtr<Cairo::Context>& context) {
|
||||
/* two very small circles, at 1/3 and 2/3 of the height */
|
||||
context->arc (bbox.x, bbox.y + (bbox.height/3.0), 1.5, 0.0, M_PI*2.0);
|
||||
context->fill ();
|
||||
context->arc (bbox.x, bbox.y + (2.0 * bbox.height/3.0), 1.5, 0.0, M_PI*2.0);
|
||||
context->fill ();
|
||||
}
|
||||
|
||||
void set_size (Glib::RefPtr<Pango::Context>& context, const Pango::FontDescription& font) {
|
||||
Pango::FontMetrics metrics = context->get_metrics (font);
|
||||
bbox.width = 3.0;
|
||||
bbox.height = (metrics.get_ascent() + metrics.get_descent()) / PANGO_SCALE;
|
||||
}
|
||||
|
||||
private:
|
||||
};
|
||||
|
||||
class CairoTextCell : public CairoCell
|
||||
{
|
||||
public:
|
||||
CairoTextCell (uint32_t width_chars);
|
||||
|
||||
void set_size (Glib::RefPtr<Pango::Context>&, const Pango::FontDescription&);
|
||||
|
||||
void set_text (const std::string& txt) {
|
||||
layout->set_text (txt);
|
||||
}
|
||||
std::string get_text() const {
|
||||
return layout->get_text ();
|
||||
}
|
||||
uint32_t width_chars() const { return _width_chars; }
|
||||
|
||||
void render (Cairo::RefPtr<Cairo::Context>&);
|
||||
|
||||
protected:
|
||||
uint32_t _width_chars;
|
||||
Glib::RefPtr<Pango::Layout> layout;
|
||||
};
|
||||
|
||||
class CairoEditableText : public Gtk::Misc
|
||||
{
|
||||
public:
|
||||
CairoEditableText ();
|
||||
|
||||
void add_cell (uint32_t id, CairoCell*);
|
||||
CairoCell* get_cell (uint32_t id);
|
||||
|
||||
void set_text (uint32_t id, const std::string& text);
|
||||
|
||||
void set_colors (double cr, double cg, double cb, double ca) {
|
||||
r = cr;
|
||||
g = cg;
|
||||
b = cb;
|
||||
a = ca;
|
||||
queue_draw ();
|
||||
}
|
||||
|
||||
void set_edit_colors (double cr, double cg, double cb, double ca) {
|
||||
edit_r = cr;
|
||||
edit_g = cg;
|
||||
edit_b = cb;
|
||||
edit_a = ca;
|
||||
queue_draw ();
|
||||
}
|
||||
|
||||
void set_bg (double r, double g, double b, double a) {
|
||||
bg_r = r;
|
||||
bg_g = g;
|
||||
bg_b = b;
|
||||
bg_a = a;
|
||||
}
|
||||
|
||||
bool on_expose_event (GdkEventExpose*);
|
||||
bool on_key_press_event (GdkEventKey*);
|
||||
bool on_key_release_event (GdkEventKey*);
|
||||
bool on_button_press_event (GdkEventButton*);
|
||||
bool on_button_release_event (GdkEventButton*);
|
||||
void on_size_request (GtkRequisition*);
|
||||
void on_size_allocate (Gtk::Allocation&);
|
||||
bool on_focus_in_event (GdkEventFocus*);
|
||||
bool on_focus_out_event (GdkEventFocus*);
|
||||
|
||||
void set_font (const std::string& str) {
|
||||
font = Pango::FontDescription (str);
|
||||
}
|
||||
|
||||
private:
|
||||
typedef std::map<uint32_t,CairoCell*> CellMap;
|
||||
|
||||
CellMap cells;
|
||||
Pango::FontDescription font;
|
||||
uint32_t editing_id;
|
||||
uint32_t editing_pos;
|
||||
double width;
|
||||
double max_cell_height;
|
||||
double height;
|
||||
double corner_radius;
|
||||
double xpad;
|
||||
double ypad;
|
||||
double r;
|
||||
double g;
|
||||
double b;
|
||||
double a;
|
||||
double edit_r;
|
||||
double edit_g;
|
||||
double edit_b;
|
||||
double edit_a;
|
||||
double bg_r;
|
||||
double bg_g;
|
||||
double bg_b;
|
||||
double bg_a;
|
||||
|
||||
|
||||
CairoCell* find_cell (uint32_t x, uint32_t y, uint32_t& cell_id);
|
||||
void edit_next_cell ();
|
||||
void queue_draw_cell (CairoCell* target);
|
||||
void set_text (CairoTextCell* cell, const std::string&);
|
||||
};
|
||||
|
||||
#endif /* __libgtmm2ext_cairocell_h__ */
|
||||
@ -26,6 +26,7 @@ gtkmm2ext_sources = [
|
||||
'binding_proxy.cc',
|
||||
'bindable_button.cc',
|
||||
'bindings.cc',
|
||||
'cairocell.cc',
|
||||
'cell_renderer_pixbuf_multi.cc',
|
||||
'cell_renderer_pixbuf_toggle.cc',
|
||||
'choice.cc',
|
||||
|
||||
Loading…
Reference in New Issue
Block a user