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/* -*- Mode: Vala; indent-tabs-mode: nil; tab-width: 4 -*-
* -*- coding: utf-8 -*-
*
* Copyright (C) 2011 ~ 2018 Deepin, Inc.
* 2011 ~ 2018 Wang Yong
*
* Author: Wang Yong <wangyong@deepin.com>
* Maintainer: Wang Yong <wangyong@deepin.com>
*
* 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
* 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/>.
*/
using Cairo;
namespace Draw {
public void draw_surface(Cairo.Context cr, ImageSurface surface, int x = 0, int y = 0, int width=0, int height=0) {
if (surface != null) {
cr.set_source_surface(surface, x + int.max(0, (int)(width - surface.get_width() / Utils.get_default_monitor_scale()) / 2),
y + int.max(0, (int)(height - surface.get_height() / Utils.get_default_monitor_scale()) / 2));
cr.paint_with_alpha(1.0);
}
}
public Pango.Layout create_layout_from_context_for_text(Cairo.Context cr, string text, int font_size, int layout_width,
Pango.Alignment horizontal_alignment = Pango.Alignment.LEFT,
string vertical_align = "middle", int? wrap_width=null) {
var font_description = new Pango.FontDescription();
font_description.set_size((int)(font_size * Pango.SCALE));
var layout = Pango.cairo_create_layout(cr);
layout.set_font_description(font_description);
layout.set_markup(text, text.length);
layout.set_alignment(horizontal_alignment);
if (wrap_width == null) {
layout.set_single_paragraph_mode(true);
layout.set_width(layout_width * Pango.SCALE);
layout.set_ellipsize(Pango.EllipsizeMode.END);
} else {
layout.set_width(wrap_width * Pango.SCALE);
layout.set_wrap(Pango.WrapMode.WORD);
}
return layout;
}
public void draw_text(Cairo.Context cr, string text, int x, int y, int width, int height, int size,
Pango.Alignment horizontal_alignment=Pango.Alignment.LEFT,
string vertical_align = "middle",
int? wrap_width=null) {
cr.save();
var layout = create_layout_from_context_for_text(cr, text, size, width, horizontal_alignment, vertical_align, wrap_width);
int text_width, text_height;
layout.get_pixel_size(out text_width, out text_height);
int render_y;
if (vertical_align == "top") {
render_y = y;
} else if (vertical_align == "middle") {
render_y = y + int.max(0, (height - text_height) / 2);
} else {
render_y = y + int.max(0, height - text_height);
}
cr.move_to(x, render_y);
Pango.cairo_update_layout(cr, layout);
Pango.cairo_show_layout(cr, layout);
cr.restore();
}
public void draw_layout(Cairo.Context cr, Pango.Layout layout, int x, int y) {
cr.move_to(x, y);
Pango.cairo_update_layout(cr, layout);
Pango.cairo_show_layout(cr, layout);
}
public Pango.Layout create_layout_from_widget_for_text(Gtk.Widget widget, string text, int font_size, int layout_width,
Pango.Alignment horizontal_alignment = Pango.Alignment.LEFT,
string vertical_align = "middle", int? wrap_width=null) {
var font_description = new Pango.FontDescription();
font_description.set_size((int)(font_size * Pango.SCALE));
var layout = widget.create_pango_layout(null);
layout.set_font_description(font_description);
layout.set_text(text, text.length);
layout.set_alignment(horizontal_alignment);
if (wrap_width == null) {
layout.set_single_paragraph_mode(true);
layout.set_width(layout_width * Pango.SCALE);
layout.set_ellipsize(Pango.EllipsizeMode.END);
} else {
layout.set_width(wrap_width * Pango.SCALE);
layout.set_wrap(Pango.WrapMode.WORD);
}
return layout;
}
public void get_text_bounding_rect_from_widget(Gtk.Widget widget, string text, int font_size, int layout_width,
out int bounding_width, out int bounding_height,
Pango.Alignment horizontal_alignment = Pango.Alignment.LEFT,
string vertical_align = "middle", int? wrap_width=null) {
var layout = create_layout_from_widget_for_text(widget, text, font_size, layout_width, horizontal_alignment, vertical_align, wrap_width);
layout.get_pixel_size(out bounding_width, out bounding_height);
}
public void get_text_bounding_rect_from_context(Cairo.Context cr, string text, int font_size, int layout_width,
out int bounding_width, out int bounding_height,
Pango.Alignment horizontal_alignment = Pango.Alignment.LEFT,
string vertical_align = "middle", int? wrap_width=null) {
var layout = create_layout_from_context_for_text(cr, text, font_size, layout_width, horizontal_alignment, vertical_align, wrap_width);
layout.get_pixel_size(out bounding_width, out bounding_height);
}
public int get_text_render_height(Gtk.Widget widget, string text, int width, int height, int size,
Pango.Alignment horizontal_alignment=Pango.Alignment.LEFT,
string vertical_align = "middle",
int? wrap_width=null) {
int text_width, text_height;
get_text_bounding_rect_from_widget(widget, text, size, width, out text_width, out text_height, horizontal_alignment, vertical_align, wrap_width);
return text_height;
}
public int get_text_render_width(Cairo.Context cr, string text, int width, int height, int size,
Pango.Alignment horizontal_alignment=Pango.Alignment.LEFT,
string vertical_align = "middle",
int? wrap_width=null) {
int text_width, text_height;
get_text_bounding_rect_from_context(cr, text, size, width, out text_width, out text_height, horizontal_alignment, vertical_align, wrap_width);
return text_width;
}
public void set_context_source_color(Cairo.Context cr, Gdk.RGBA rgba) {
cr.set_source_rgba(rgba.red, rgba.green, rgba.blue, rgba.alpha);
}
public void draw_rectangle(Cairo.Context cr, int x, int y, int w, int h, bool fill=true) {
cr.rectangle(x, y, w, h);
if (fill) {
cr.fill();
} else {
cr.stroke();
}
}
public void fill_rounded_rectangle(Context cr, int x, int y, int width, int height, double r) {
cr.new_sub_path();
cr.arc(x + width - r, y + r, r, Math.PI * 3 / 2, Math.PI * 2);
cr.arc(x + width - r, y + height - r, r, 0, Math.PI / 2);
cr.arc(x + r, y + height - r, r, Math.PI / 2, Math.PI);
cr.arc(x + r, y + r, r, Math.PI, Math.PI * 3 / 2);
cr.close_path();
cr.fill();
}
public void stroke_rounded_rectangle(Context cr, int x, int y, int width, int height, double r, Gdk.RGBA frame_color, Gdk.RGBA background_color, int line_width=1) {
cr.set_source_rgba(frame_color.red, frame_color.green, frame_color.blue, frame_color.alpha);
Draw.fill_rounded_rectangle(cr, x, y, width, height, r);
cr.set_source_rgba(background_color.red, background_color.green, background_color.blue, background_color.alpha);
Draw.fill_rounded_rectangle(cr, x + line_width, y + line_width, width - line_width * 2, height - line_width * 2, r);
}
public void draw_search_rectangle(Context cr, int x, int y, int width, int height, double r, bool fill=true) {
// Top side.
cr.move_to(x, y);
cr.line_to(x + width, y);
// Right side.
cr.line_to(x + width, y + height);
// Bottom side.
cr.line_to(x + r, y + height);
// Bottom-left corner.
cr.arc(x + r, y + height - r, r, Math.PI / 2, Math.PI);
// Left side.
cr.line_to(x, y);
// Close path.
cr.close_path();
if (fill) {
cr.fill();
} else {
cr.stroke();
}
}
public void draw_radial(Cairo.Context cr, int x, int width, int height, Gdk.RGBA center_color, Gdk.RGBA edge_color) {
Cairo.Pattern pattern = new Cairo.Pattern.radial(x + width / 2, height, width / 2, x + width / 2, height, 0);
pattern.add_color_stop_rgba(1, center_color.red, center_color.green, center_color.blue, center_color.alpha);
pattern.add_color_stop_rgba(0, edge_color.red, edge_color.green, edge_color.blue, edge_color.alpha);
cr.set_source(pattern);
cr.paint();
}
public void clip_rectangle(Cairo.Context cr, int x, int y, int w, int h) {
cr.rectangle(x, y, w, h);
cr.clip();
}
public void clip_rounded_rectangle(Context cr, int x, int y, int width, int height, double r) {
cr.new_sub_path();
cr.arc(x + width - r, y + r, r, Math.PI * 3 / 2, Math.PI * 2);
cr.arc(x + width - r, y + height - r, r, 0, Math.PI / 2);
cr.arc(x + r, y + height - r, r, Math.PI / 2, Math.PI);
cr.arc(x + r, y + r, r, Math.PI, Math.PI * 3 / 2);
cr.close_path();
cr.clip();
}
}
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