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/*
ui/scrollpane.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include <cmath>
#include "ui/scrollpane.h"
#include "render/text.h"
#include "render/gl.h"
namespace ui
{
ScrollPane::ScrollPane(Widget *parent, ui::Text &text) : Widget(parent), scrollpane_text(text)
{
set_label("scrollpane");
set_alignment(AlignBottom);
}
ScrollPane::~ScrollPane()
{
}
void ScrollPane::set_alignment(const unsigned int alignment)
{
scrollpane_alignment = alignment;
}
void ScrollPane::set_scroll(int scroll)
{
scrollpane_scroll = scroll;
if (scrollpane_scroll > (int) scrollpane_text.size())
scrollpane_scroll = (int) scrollpane_text.size();
else if (scrollpane_scroll < 0)
scrollpane_scroll = 0;
}
void ScrollPane::inc_scroll(int scroll)
{
scrollpane_scroll += scroll;
if (scrollpane_scroll > (int) scrollpane_text.size())
scrollpane_scroll = (int) scrollpane_text.size();
}
void ScrollPane::dec_scroll(int scroll)
{
scrollpane_scroll -= scroll;
if (scrollpane_scroll < 0)
scrollpane_scroll = 0;
}
void ScrollPane::draw()
{
render::Text::setfont(font()->name().c_str(), font()->width(), font()->height());
gl::enable(GL_TEXTURE_2D);
// text size
int text_height = (int) floorf(height() / font()->height());
int text_width = (int) floorf(width() / font()->width());
// validate scroll position
if (scrollpane_scroll > (int) scrollpane_text.size())
scrollpane_scroll = (int) scrollpane_text.size();
else if (scrollpane_scroll < 0)
scrollpane_scroll = 0;
int bottom = (int) scrollpane_text.size() - scrollpane_scroll;
int current_line = 0;
ui::Text lines;
for (ui::Text::const_iterator it = scrollpane_text.begin(); it != scrollpane_text.end() && current_line < bottom; it++) {
if (current_line >= bottom - text_height) {
std::string linedata(*it);
linedata += '\n';
std::string word;
size_t word_length = 0;
std::string line;
size_t line_length = 0;
const char *c = linedata.c_str();
char pen = 'N';
char wordpen = 'N';
while (*c) {
// color code
if (aux::is_color_code(c)) {
c++;
pen = *c;
word += '^';
word += pen;
}
// new word, wrap if necessary
else if ((*c == '\n' ) || ( *c == ' ')) {
if (line_length + word_length > (size_t) text_width) {
if (line.size()) {
lines.push_back(line);
line.clear();
line += '^';
line += wordpen;
line_length = 0;
}
}
line.append(word);
line_length += word_length;
word.clear();
word_length = 0;
wordpen = pen;
// new line
if (*c == '\n' ) {
lines.push_back(line);
line.clear();
line_length = 0;
pen = 'N';
wordpen = 'N';
// new word
} else if (*c == ' ' ) {
line += ' ';
line_length++;
}
}
// new character
else {
word += *c;
word_length++;
if (word_length == (size_t) text_width) {
if (line.size()) {
lines.push_back(line);
line.clear();
line += '^';
line += wordpen;
line_length = 0;
}
line.append(word);
line_length = word_length;
word.clear();
word_length = 0;
wordpen = pen;
}
}
c++;
}
}
current_line++;
}
gl::color(palette()->text());
const math ::Vector2f gl(global_location());
float y = 0;
if ((alignment() & AlignTop) == AlignTop) {
int i = (int) lines.size();
for (ui::Text::iterator it = lines.begin(); it != lines.end(); it++) {
if (i <= text_height) {
render::Text::draw(gl.x(), gl.y() + y, (*it));
y += font()->height();
}
i--;
}
} else {
y = height() - font()->height();
for (ui::Text::reverse_iterator rit = lines.rbegin(); (y >= 0) && (rit != lines.rend()); ++rit) {
render::Text::draw(gl.x(), gl.y() + y, (*rit));
y -= font()->height();
}
}
gl::disable(GL_TEXTURE_2D);
}
}
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