/* * Copyright (C) 2012 Carl Hetherington * Copyright (C) 2013-2018 Paul Davis * Copyright (C) 2014-2017 Robin Gareus * * 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include "pbd/compose.h" #include "gtkmm2ext/utils.h" #include "canvas/canvas.h" #include "canvas/rectangle.h" #include "canvas/debug.h" using namespace std; using namespace ArdourCanvas; /* Rectangle notes * * A Rectangle is defined by an ArdourCanvas::Rect which encloses every pixel * that the Rectangle might draw. If the Rect is (0, 0, 10, 10) then a filled * version of the Rectangle will paint every pixel up to and including those * edges. * * If there is a border to the Rectangle, it will be drawn *INSIDE* the * boundary given by the Rect. The border will include (at minimum) the outer * pixel edge(s) of the Rectangle. * * This makes ArdourCanvas::Rectangle follow the semantics implied by CSS's * box-sizing: border-box, rather than box-sizing: content-box */ Rectangle::Rectangle (Canvas* c) : Item (c) , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM)) , _corner_radius (0.0) { } Rectangle::Rectangle (Canvas* c, Rect const & rect) : Item (c) , _rect (rect) , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM)) , _corner_radius (0.0) { } Rectangle::Rectangle (Item* parent) : Item (parent) , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM)) , _corner_radius (0.0) { } Rectangle::Rectangle (Item* parent, Rect const & rect) : Item (parent) , _rect (rect) , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM)) , _corner_radius (0.0) { } void Rectangle::render (Rect const & area, Cairo::RefPtr context) const { /* Note that item_to_window() already takes _position into account (as part of item_to_canvas() */ Rect self (item_to_window (_rect)); const Rect draw = self.intersection (area); if (!draw) { return; } if (_corner_radius) { context->save (); Gtkmm2ext::rounded_rectangle (context, self.x0, self.y0, self.width(), self.height(), _corner_radius); context->clip (); } if (_fill && !_transparent) { if (_stops.empty()) { setup_fill_context (context); } else { setup_gradient_context (context, self, Duple (draw.x0, draw.y0)); } if (_corner_radius) { Gtkmm2ext::rounded_rectangle (context, draw.x0, draw.y0, draw.width(), draw.height(), _corner_radius); } else { context->rectangle (draw.x0, draw.y0, draw.width(), draw.height()); } context->fill (); } if (_outline && _outline_width && _outline_what) { setup_outline_context (context); const double shift = _outline_width * 0.5; self = self.translate (Duple (shift, shift)); if (_outline_what == ALL) { if (_corner_radius) { Gtkmm2ext::rounded_rectangle (context, self.x0, self.y0, self.width() - _outline_width, self.height() - _outline_width, _corner_radius); } else { context->rectangle (self.x0, self.y0, self.width() - _outline_width, self.height() - _outline_width); } } else { if (_outline_what & LEFT) { context->move_to (self.x0, self.y0); context->line_to (self.x0, self.y1); } if (_outline_what & TOP) { context->move_to (self.x0, self.y0); context->line_to (self.x1, self.y0); } if (_outline_what & BOTTOM) { context->move_to (self.x0, self.y1); context->line_to (self.x1, self.y1); } if (_outline_what & RIGHT) { context->move_to (self.x1, self.y0); context->line_to (self.x1, self.y1); } } context->stroke (); } if (_corner_radius) { context->restore (); } render_children (area, context); } void Rectangle::size_request (double& w, double& h) const { if (_requested_width || _requested_width) { w = _requested_width; h = _requested_height; } else { w = _rect.width(); h = _rect.height(); } } void Rectangle::compute_bounding_box () const { if (_rect.empty ()) { _bounding_box = Rect (); } else if (_outline && _outline_width && _outline_what) { _bounding_box = _rect.fix().expand (ceil (_outline_width * 0.5)); } else { _bounding_box = _rect.fix(); } set_bbox_clean (); } void Rectangle::set (Rect const & r) { /* We don't update the bounding box here; it's just as cheap to do it when asked. */ if (r != _rect) { begin_change (); _rect = r; set_bbox_dirty (); end_change (); } } void Rectangle::set_x0 (Coord x0) { if (x0 != _rect.x0) { begin_change (); _rect.x0 = x0; set_bbox_dirty (); end_change (); } } void Rectangle::set_y0 (Coord y0) { if (y0 != _rect.y0) { begin_change (); _rect.y0 = y0; set_bbox_dirty (); end_change(); } } void Rectangle::set_x1 (Coord x1) { if (x1 != _rect.x1) { begin_change (); _rect.x1 = x1; set_bbox_dirty (); end_change (); } } void Rectangle::set_y1 (Coord y1) { if (y1 != _rect.y1) { begin_change (); _rect.y1 = y1; set_bbox_dirty (); end_change (); } } void Rectangle::set_outline_what (What what) { if (what != _outline_what) { begin_visual_change (); _outline_what = what; end_visual_change (); } } double Rectangle::vertical_fraction (double y) const { /* y is in canvas coordinates */ Duple i (canvas_to_item (Duple (0, y))); Rect r = bounding_box(); if (!r) { return 0; /* not really correct, but what else can we do? */ } Rect bbox (r); if (i.y < bbox.y0 || i.y >= bbox.y1) { return 0; } /* convert to fit Cairo origin model (origin at upper left) */ return 1.0 - ((i.y - bbox.y0) / bbox.height()); } void Rectangle::_size_allocate (Rect const & r) { Item::_size_allocate (r); if (_layout_sensitive) { /* Set _position use the upper left of the Rect, and then set the _rect member with values that use _position as the origin. */ Rect r2 (0, 0, r.x1 - r.x0, r.y1 - r.y0); set (r2); } } void Rectangle::set_corner_radius (double r) { /* note: this does not change the bounding box */ begin_change (); _corner_radius = r; end_change (); } void Rectangle::dump (std::ostream & o) const { Item::dump (o); o << _canvas->indent() << " outline: w " << outline_width() << " color " << outline_color() << " what 0x" << std::hex << _outline_what << std::dec << endl; }