spinbar.cpp

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#include <qpainter.h>
#include <qbitmap.h>
#include <qapplication.h>
#include <archos/screen.h>
#include "style.h"
#include "spinbar.h"
#include "fontchooser.h"

using namespace archos;

Spinbar::Spinbar(QWidget *parent, int spinbar_length, int cursor_length) :
	QWidget(parent, "spin_bar", WRepaintNoErase)
		, m_length(spinbar_length)
		, m_cursor_length(cursor_length)
		, m_cursor_pos(0)
{
	QString path = AStyle::iconpath + Screen::prefix();
	m_cursor_left_border = path + "general/spinbar_cursor_leftborder.png";
	m_cursor_left = path + "general/spinbar_cursor_left.png";
	m_empty_left = path + "general/spinbar_empty_left.png";
	m_cursor = path + "general/spinbar_cursor.png";
	m_empty = path + "general/spinbar_empty.png";
	m_empty_right = path + "general/spinbar_empty_right.png";
	m_cursor_right = path + "general/spinbar_cursor_right.png";
	m_cursor_right_border = path + "general/spinbar_cursor_rightborder.png";

	QFont font = qApp->font();
	if (Screen::mode() == wqvga || Screen::mode() == qvga) {
		font.setPointSize(16);
	}
	else if ( Screen::mode() == wvga ) {
		font.setPointSize(22);
	}
	else {  // tv
		font.setPointSize(18);
	}
	setFont(font);
	connect(&m_timer, SIGNAL(timeout()), this, SLOT(spin()));
	resize(m_length, m_cursor.height());
	polish();
};

Spinbar::~Spinbar()
{
	stop();
}

void Spinbar::polish()
{
	QBitmap mask(size());
	QPainter p(&mask);
	p.drawPixmap(0, 0, m_empty_left);
	int len = m_length - m_empty_left.width() - m_empty_right.width();
	int i;
	for (i = 0; i < len; i++) {
		p.drawPixmap(m_empty_left.width() + i, 0, m_empty);
	}
	p.drawPixmap(m_empty_left.width() + i, 0, m_empty_right);
	setMask(mask);
}

void Spinbar::start(void)
{
	polish();
	m_cursor_pos = 0;
	m_timer.start(50);
}

void Spinbar::setText(QString text) 
{
	m_text = text;
}

void Spinbar::stop(void)
{
	m_timer.stop();
}

void Spinbar::spin()
{
	m_cursor_pos = (m_cursor_pos + 1) % (m_length + m_cursor_length);
	update();
}

void Spinbar::paintEvent(QPaintEvent *evt)
{
	QRect area(rect());
	QPixmap pix(area.size());
	QPainter p(&pix, this);
	//QPainter p(this);

	int cursor_start = m_cursor_pos - m_cursor_length;
	if (cursor_start < 0)
		cursor_start = 0;
	int cursor_end = m_cursor_pos;
	int cursor_len = cursor_end - cursor_start;

	if (cursor_end <= m_cursor_length) {
		for (int i = 0; i < cursor_len; i++) {
			p.drawPixmap(cursor_start + i, 0, m_cursor);
		}
		p.drawPixmap(0, 0, m_cursor_left_border, 0, 0, cursor_len);
		for (int i = 0; i < m_length - cursor_end; i++) {
			p.drawPixmap(cursor_end + i, 0, m_empty);
		}
		if (cursor_end > m_cursor_left_border.width() + 1) {
			p.drawPixmap(m_cursor_pos - m_cursor_right.width(), 0, 
			m_cursor_right);
		}
		p.drawPixmap(m_length - m_empty_right.width(), 0, m_empty_right);
	} else if (cursor_start > 0 && cursor_end < m_length) {
		for (int i = 0; i < cursor_start; i++) {
			p.drawPixmap(i, 0, m_empty);
		}
		for (int i = 0; i < cursor_len; i++) {
			p.drawPixmap(cursor_start + i, 0, m_cursor);
		}
		if (cursor_start > m_empty_right.width()) {
			p.drawPixmap(0, 0, m_empty_left);
			p.drawPixmap(cursor_start, 0, m_cursor_left);
		} else {
			p.drawPixmap(0, 0, m_empty_left, 0, 0, cursor_start);
			p.drawPixmap(cursor_start, 0, m_cursor_left_border, cursor_start, 
				0, m_empty_right.width() - cursor_start);
		}
		for (int i = 0; i < m_length - cursor_end; i++) {
			p.drawPixmap(cursor_end + i, 0, m_empty);
		}
		if (cursor_end < m_length - m_cursor_right.width()) {
			p.drawPixmap(cursor_end - m_cursor_right.width(), 0, m_cursor_right);
			p.drawPixmap(m_length - m_empty_right.width(), 0, m_empty_right);
		}
	} else {
		int i;
		for (i = 0; i < m_cursor_pos - m_cursor_length; i++) {
			p.drawPixmap(i, 0, m_empty);
		}
		for (; i < m_length; i++) {
			p.drawPixmap(i, 0, m_cursor);
		}
		p.drawPixmap(m_cursor_pos - m_cursor_length, 0, m_cursor_left);
		p.drawPixmap(0, 0, m_empty_left);
	}

	if (!m_text.isEmpty()) {
		p.drawText(0, 1, width(), height(), AlignVCenter | AlignHCenter, m_text);
	}

	QPainter screen(this);
	screen.drawPixmap(area.topLeft(), pix);
}