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/* Copyright (C) 2013 Nikos Chantziaras.
*
* This file is part of the QTads program. 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
* 2, 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; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <QDebug>
#include <QPaintEvent>
#include <QStatusBar>
#include "htmlattr.h"
#include "htmlfmt.h"
#include "htmldisp.h"
#include "dispwidget.h"
#include "settings.h"
#include "syswininput.h"
DisplayWidget::DisplayWidget( CHtmlSysWinQt* parent, CHtmlFormatter* formatter )
: QWidget(parent),
fHoverLink(0),
fClickedLink(0),
parentSysWin(parent),
formatter(formatter)
{
this->setForegroundRole(QPalette::Text);
this->setBackgroundRole(QPalette::Base);
// Enable mouse tracking, since we need to change the mouse cursor shape
// when hovering over hyperlinks.
this->setMouseTracking(true);
}
void
DisplayWidget::fInvalidateLinkTracking()
{
// If we're tracking links (hover/click), forget about them.
if (this->fClickedLink != 0) {
this->fClickedLink->set_clicked(this->parentSysWin, CHtmlDispLink_none);
this->fClickedLink = 0;
}
if (this->fHoverLink != 0) {
this->fHoverLink->set_clicked(this->parentSysWin, CHtmlDispLink_none);
this->fHoverLink = 0;
}
this->unsetCursor();
qWinGroup->statusBar()->setUpdatesEnabled(false);
qWinGroup->statusBar()->clearMessage();
qWinGroup->statusBar()->setUpdatesEnabled(true);
}
void
DisplayWidget::paintEvent( QPaintEvent* e )
{
//qDebug() << Q_FUNC_INFO << "called";
//qDebug() << "repainting" << e->rect();
const QRect& qRect = e->region().boundingRect();
CHtmlRect cRect(qRect.left(), qRect.top(), qRect.left() + qRect.width(), qRect.top() + qRect.height());
this->formatter->draw(&cRect, false, 0);
}
void
DisplayWidget::mouseMoveEvent( QMouseEvent* e )
{
this->updateLinkTracking(e->pos());
}
void
DisplayWidget::leaveEvent( QEvent* )
{
this->fInvalidateLinkTracking();
}
void
DisplayWidget::mousePressEvent( QMouseEvent* )
{
if (this->fHoverLink == 0) {
// We're not hover-tracking a link; there's nothing to do here.
return;
}
// If we're hover-tracking a clickable link here, also click-track it.
if (this->fHoverLink->is_clickable_link() and qFrame->settings()->enableLinks) {
// Draw all of the items involved in the link in the hilited state.
this->fHoverLink->set_clicked(this->parentSysWin, CHtmlDispLink_clicked);
this->fClickedLink = this->fHoverLink;
}
}
void
DisplayWidget::mouseReleaseEvent( QMouseEvent* )
{
if (this->fClickedLink == 0) {
// We're not click-tracking a link; there's nothing to do here.
return;
}
// If we're still hovering over the clicked link, process it.
if (this->fClickedLink == this->fHoverLink) {
const textchar_t* cmd = this->fClickedLink->href_.get_url();
qFrame->gameWindow()->processCommand(cmd, strlen(cmd), this->fClickedLink->get_append(),
not this->fClickedLink->get_noenter(), OS_CMD_NONE);
// Put it back in hovering mode.
if (qFrame->settings()->highlightLinks) {
this->fClickedLink->set_clicked(this->parentSysWin, CHtmlDispLink_hover);
}
// Otherwise, if we're hovering over another link, put that one in hover mode.
} else if (this->fHoverLink != 0) {
this->fHoverLink->set_clicked(this->parentSysWin, CHtmlDispLink_hover);
}
// Stop click-tracking it.
this->fClickedLink = 0;
}
void
DisplayWidget::updateLinkTracking( const QPoint& mousePos )
{
// Get the display object containing the position.
CHtmlPoint docPos;
// If specified mouse position is invalid, map it from the current global
// position.
if (mousePos.isNull()) {
const QPoint pos(this->mapFromGlobal(QCursor::pos()));
docPos.set(pos.x(), pos.y());
} else {
docPos.set(mousePos.x(), mousePos.y());
}
CHtmlDisp* disp = this->formatter->find_by_pos(docPos, true);
// If there's nothing, no need to continue.
if (disp == 0) {
// If we were tracking anything, forget about it.
if (this->fHoverLink != 0) {
this->fHoverLink->set_clicked(this->parentSysWin, CHtmlDispLink_none);
this->fHoverLink = 0;
this->unsetCursor();
qWinGroup->statusBar()->setUpdatesEnabled(false);
qWinGroup->statusBar()->clearMessage();
qWinGroup->statusBar()->setUpdatesEnabled(true);
}
return;
}
// It could be a link.
if (qFrame->settings()->enableLinks) {
CHtmlDispLink* link = disp->get_link(this->formatter, docPos.x, docPos.y);
// If we're already tracking a hover over this link, we don't need to
// do anything else.
if (link == this->fHoverLink) {
return;
}
// If we're tracking a hover and it's a new link, track this one and
// forget about the previous one.
if (link != this->fHoverLink) {
if (this->fHoverLink != 0) {
this->fHoverLink->set_clicked(this->parentSysWin, CHtmlDispLink_none);
}
this->fHoverLink = link;
}
// If it's a clickable link, also change the mouse cursor shape and
// hovering color.
if (link != 0 and link->is_clickable_link()) {
this->setCursor(Qt::PointingHandCursor);
// Only change its color if we're not click-tracking another link.
if (qFrame->settings()->highlightLinks and this->fClickedLink == 0) {
link->set_clicked(this->parentSysWin, CHtmlDispLink_hover);
}
}
// If we found something that has ALT text, show it in the status bar.
if (disp->get_alt_text() != 0 and strlen(disp->get_alt_text()) > 0) {
qWinGroup->statusBar()->setUpdatesEnabled(false);
qWinGroup->statusBar()->showMessage(QString::fromUtf8(disp->get_alt_text()));
qWinGroup->statusBar()->setUpdatesEnabled(true);
return;
}
// It could be a clickable link without any ALT text. In that case, show
// its contents.
if (link != 0 and link->is_clickable_link()) {
qWinGroup->statusBar()->setUpdatesEnabled(false);
qWinGroup->statusBar()->showMessage(QString::fromUtf8(link->href_.get_url()));
qWinGroup->statusBar()->setUpdatesEnabled(true);
return;
}
}
// We don't know what it was. Clear status bar message, reset cursor shape
// and forget about any link we were tracking.
qWinGroup->statusBar()->setUpdatesEnabled(false);
qWinGroup->statusBar()->clearMessage();
qWinGroup->statusBar()->setUpdatesEnabled(true);
this->unsetCursor();
if (this->fHoverLink != 0) {
this->fHoverLink->set_clicked(this->parentSysWin, CHtmlDispLink_none);
this->fHoverLink = 0;
}
}
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