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// Copyright © 2015 Richard Kettlewell.
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
#include <config.h>
#include "Render.h"
#include "Utils.h"
#include <pangomm/layout.h>
// Widget
Render::Widget::~Widget() {
deleteAll(cleanup_list);
}
void Render::Widget::changed() {
if(width >= 0) {
width = height = -1;
if(parent)
parent->changed();
}
}
void Render::Widget::cleanup(Widget *w) {
cleanup_list.push_back(w);
}
// Container
void Render::Container::add(Widget *widget, double x, double y) {
children.push_back(Child(widget, x, y));
widget->parent = this;
changed();
}
void Render::Container::set_extent() {
width = 0;
height = 0;
for(const auto &child: children) {
if(child.widget->width < 0)
child.widget->set_extent();
width = std::max(child.x + child.widget->width, width);
height = std::max(child.y + child.widget->height, height);
}
width = ceil(width);
height = ceil(height);
}
void Render::Container::render() {
Render::Guard g(this);
for(const auto &child: children) {
context.cairo->translate(child.x, child.y);
child.widget->render();
context.cairo->translate(-child.x, -child.y);
}
}
// Grid
void Render::Grid::add(Widget *widget, unsigned column, unsigned row,
int hj, int vj) {
children.push_back(GridChild(widget, column, row, hj, vj));
widget->parent = this;
changed();
}
void Render::Grid::set_padding(double xp, double yp) {
xpadding = xp;
ypadding = yp;
changed();
}
void Render::Grid::set_minimum(double w, double h) {
force_width = w;
force_height = h;
changed();
}
void Render::Grid::set_extent() {
column_widths.clear();
row_heights.clear();
for(const auto &child: children) {
if(child.widget->width < 0)
child.widget->set_extent();
if(child.column >= column_widths.size())
column_widths.resize(child.column + 1);
column_widths[child.column] = std::max(child.widget->width,
column_widths[child.column]);
if(child.row >= row_heights.size())
row_heights.resize(child.row + 1);
row_heights[child.row] = std::max(child.widget->height,
row_heights[child.row]);
}
for(auto &column_width: column_widths)
column_width=std::max(column_width, force_width);
width = xpadding * (column_widths.size() - 1);
for(auto column_width: column_widths)
width += column_width;
for(auto &row_height: row_heights)
row_height=std::max(row_height, force_height);
height = ypadding * (row_heights.size() - 1);
for(auto row_height: row_heights)
height += row_height;
}
void Render::Grid::render() {
Render::Guard g(this);
for(const auto &child: children) {
double child_x = 0;
for(unsigned column = 0; column < child.column; ++column)
child_x += column_widths[column] + xpadding;
double child_y = 0;
for(unsigned row = 0; row < child.row; ++row)
child_y += row_heights[row] + ypadding;
child_x = justify(child_x, column_widths[child.column],
child.widget->width, child.hj);
child_y = justify(child_y, row_heights[child.row],
child.widget->height, child.vj);
context.cairo->translate(child_x, child_y);
child.widget->render();
context.cairo->translate(-child_x, -child_y);
}
}
double Render::Grid::justify(double x, double cell_width,
double child_width, int justification) {
return x + floor((cell_width - child_width) * (justification + 1) / 2.0);
}
// Colored
void Render::Colored::render() {
set_source_color(color);
}
// Text
Render::Text::Text(Context &context,
const std::string &t,
const Color &c,
const std::string &f):
Colored(context, c),
text(t),
font(f) {
}
void Render::Text::set_text(const std::string &t) {
text = t;
changed();
}
void Render::Text::set_font(const std::string &f) {
font = Pango::FontDescription(f);
changed();
}
void Render::Text::set_extent() {
if(!layout)
layout = Pango::Layout::create(context.cairo);
layout->set_text(text);
layout->set_font_description(font);
Pango::Rectangle ink, logical;
layout->get_pixel_extents(ink, logical);
width = ceil(logical.get_width());
height = ceil(logical.get_height());
}
void Render::Text::render() {
Colored::render();
context.cairo->move_to(0, 0);
layout->show_in_cairo_context(context.cairo);
}
// Rectangle
void Render::Rectangle::set_extent() {
}
void Render::Rectangle::render() {
Colored::render();
context.cairo->rectangle(0, 0, width, height);
context.cairo->fill();
}
void Render::Rectangle::changed() {
}
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