Paul Davis
860d43697c
This previously wasn't done because of fear that it would affect the traditional fixed-sized canvas, but only items that _layout_sensitive (i.e. are packed into a constraint packer directly) will actually do anything in ::size_allocate(). Possibly might want to relax this to cover items that have a constraint packer between them and a root group.
313 lines
6.6 KiB
C++
313 lines
6.6 KiB
C++
/*
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* Copyright (C) 2012 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2013-2018 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
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*
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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
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <iostream>
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#include <cairomm/context.h>
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#include "pbd/compose.h"
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#include "gtkmm2ext/utils.h"
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#include "canvas/canvas.h"
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#include "canvas/rectangle.h"
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#include "canvas/debug.h"
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using namespace std;
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using namespace ArdourCanvas;
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/* Rectangle notes
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*
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* A Rectangle is defined by an ArdourCanvas::Rect which encloses every pixel
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* that the Rectangle might draw. If the Rect is (0, 0, 10, 10) then a filled
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* version of the Rectangle will paint every pixel up to and including those
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* edges.
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*
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* If there is a border to the Rectangle, it will be drawn *INSIDE* the
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* boundary given by the Rect. The border will include (at minimum) the outer
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* pixel edge(s) of the Rectangle.
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*
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* This makes ArdourCanvas::Rectangle follow the semantics implied by CSS's
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* box-sizing: border-box, rather than box-sizing: content-box
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*/
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Rectangle::Rectangle (Canvas* c)
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: Item (c)
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, _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
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, _corner_radius (0.0)
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{
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}
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Rectangle::Rectangle (Canvas* c, Rect const & rect)
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: Item (c)
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, _rect (rect)
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, _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
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, _corner_radius (0.0)
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{
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}
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Rectangle::Rectangle (Item* parent)
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: Item (parent)
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, _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
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, _corner_radius (0.0)
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{
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}
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Rectangle::Rectangle (Item* parent, Rect const & rect)
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: Item (parent)
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, _rect (rect)
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, _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
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, _corner_radius (0.0)
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{
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}
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void
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Rectangle::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
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{
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/* Note that item_to_window() already takes _position into account (as
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part of item_to_canvas()
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*/
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Rect self (item_to_window (_rect));
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const Rect draw = self.intersection (area);
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if (!draw) {
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return;
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}
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if (_corner_radius) {
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context->save ();
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Gtkmm2ext::rounded_rectangle (context, self.x0, self.y0, self.width(), self.height(), _corner_radius);
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context->clip ();
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}
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if (_fill && !_transparent) {
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if (_stops.empty()) {
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setup_fill_context (context);
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} else {
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setup_gradient_context (context, self, Duple (draw.x0, draw.y0));
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}
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if (_corner_radius) {
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Gtkmm2ext::rounded_rectangle (context, draw.x0, draw.y0, draw.width(), draw.height(), _corner_radius);
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} else {
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context->rectangle (draw.x0, draw.y0, draw.width(), draw.height());
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}
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context->fill ();
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}
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if (_outline && _outline_width && _outline_what) {
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setup_outline_context (context);
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const double shift = _outline_width * 0.5;
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self = self.translate (Duple (shift, shift));
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if (name == "selection frame") {
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std::cerr << "Render selection frame on " << self << std::endl;
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}
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if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
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if (_corner_radius) {
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Gtkmm2ext::rounded_rectangle (context, self.x0, self.y0, self.width() - _outline_width, self.height() - _outline_width, _corner_radius);
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} else {
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context->rectangle (self.x0, self.y0, self.width() - _outline_width, self.height() - _outline_width);
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}
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} else {
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if (_outline_what & LEFT) {
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context->move_to (self.x0, self.y0);
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context->line_to (self.x0, self.y1);
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}
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if (_outline_what & TOP) {
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context->move_to (self.x0, self.y0);
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context->line_to (self.x1, self.y0);
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}
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if (_outline_what & BOTTOM) {
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context->move_to (self.x0, self.y1);
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context->line_to (self.x1, self.y1);
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}
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if (_outline_what & RIGHT) {
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context->move_to (self.x1, self.y0);
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context->line_to (self.x1, self.y1);
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}
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}
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context->stroke ();
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}
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if (_corner_radius) {
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context->restore ();
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}
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render_children (area, context);
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}
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void
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Rectangle::size_request (double& w, double& h) const
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{
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w = _rect.width();
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h = _rect.height();
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}
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void
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Rectangle::compute_bounding_box () const
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{
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if (!_rect.empty()) {
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_bounding_box = _rect.fix().expand (_outline_width * 0.5);
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}
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_bounding_box_dirty = false;
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}
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void
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Rectangle::set (Rect const & r)
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{
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/* We don't update the bounding box here; it's just
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as cheap to do it when asked.
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*/
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if (r != _rect) {
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begin_change ();
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_rect = r;
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_bounding_box_dirty = true;
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end_change ();
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}
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}
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void
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Rectangle::set_x0 (Coord x0)
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{
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if (x0 != _rect.x0) {
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begin_change ();
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_rect.x0 = x0;
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_bounding_box_dirty = true;
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end_change ();
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}
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}
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void
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Rectangle::set_y0 (Coord y0)
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{
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if (y0 != _rect.y0) {
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begin_change ();
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_rect.y0 = y0;
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_bounding_box_dirty = true;
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end_change();
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}
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}
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void
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Rectangle::set_x1 (Coord x1)
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{
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if (x1 != _rect.x1) {
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begin_change ();
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_rect.x1 = x1;
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_bounding_box_dirty = true;
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end_change ();
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}
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}
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void
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Rectangle::set_y1 (Coord y1)
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{
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if (y1 != _rect.y1) {
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begin_change ();
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_rect.y1 = y1;
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_bounding_box_dirty = true;
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end_change ();
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}
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}
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void
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Rectangle::set_outline_what (What what)
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{
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if (what != _outline_what) {
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begin_visual_change ();
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_outline_what = what;
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end_visual_change ();
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}
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}
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double
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Rectangle::vertical_fraction (double y) const
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{
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/* y is in canvas coordinates */
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Duple i (canvas_to_item (Duple (0, y)));
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Rect r = bounding_box();
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if (!r) {
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return 0; /* not really correct, but what else can we do? */
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}
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Rect bbox (r);
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if (i.y < bbox.y0 || i.y >= bbox.y1) {
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return 0;
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}
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/* convert to fit Cairo origin model (origin at upper left)
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*/
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return 1.0 - ((i.y - bbox.y0) / bbox.height());
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}
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void
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Rectangle::size_allocate (Rect const & r)
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{
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Item::size_allocate (r);
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if (_layout_sensitive) {
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/* Item::size_allocate() will have set _position, and then set
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the _rect member with values that use _position as the
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origin.
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*/
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Rect r2 (0, 0, r.x1 - r.x0, r.y1 - r.y0);
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set (r2);
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}
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}
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void
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Rectangle::set_corner_radius (double r)
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{
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/* note: this does not change the bounding box */
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begin_change ();
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_corner_radius = r;
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end_change ();
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}
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