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//
// Class: DVIWidget
//
// Widget for displaying TeX DVI files.
// Part of KDVI- A previewer for TeX DVI files.
//
// (C) 2004 Wilfried Huss, Stefan Kebekus
// Distributed under the GPL
//
#include <config.h>
#include <kdebug.h>
#include <klocale.h>
#include "dviWidget.h"
#include "documentPageCache.h"
#include "documentWidget.h"
#include "hyperlink.h"
#include "pageView.h"
#include "renderedDviPagePixmap.h"
#include "selection.h"
DVIWidget::DVIWidget(TQWidget* parent, PageView* sv, DocumentPageCache* cache, const char* name)
: DocumentWidget(parent, sv, cache, name)
{
}
void DVIWidget::mousePressEvent(TQMouseEvent* e)
{
// pageNr == 0 indicated an invalid page (e.g. page number not yet set)
if (pageNr == 0)
return;
// Get a pointer to the page contents
RenderedDviPagePixmap* pageData = dynamic_cast<RenderedDviPagePixmap*>(documentCache->getPage(pageNr));
if (pageData == 0)
{
kdDebug(4300) << "DVIWidget::mousePressEvent(...) pageData for page #" << pageNr << " is empty" << endl;
return;
}
// Check if the mouse is pressed on a source-hyperlink
// source hyperlinks can be invoked with the Middle Mousebutton or alternatively
// with Control+Left Mousebutton
if ((e->button() == Qt::MidButton || (e->button() == Qt::LeftButton && (e->state() & ControlButton)))
&& (pageData->sourceHyperLinkList.size() > 0))
{
int minIndex = 0;
int minimum = 0;
for(unsigned int i=0; i<pageData->sourceHyperLinkList.size(); i++)
{
if (pageData->sourceHyperLinkList[i].box.contains(e->pos()))
{
emit(SRCLink(pageData->sourceHyperLinkList[i].linkText, e, this));
e->accept();
return;
}
// Remember the closest source link
TQPoint center = pageData->sourceHyperLinkList[i].box.center();
int dx = center.x() - e->pos().x();
int dy = center.y() - e->pos().y();
if (dx*dx + dy*dy < minimum || i == 0)
{
minIndex = i;
minimum = dx*dx + dy*dy;
}
}
// If the mouse pointer is not exactly inside a source link, jump to the closest target.
emit(SRCLink(pageData->sourceHyperLinkList[minIndex].linkText, e, this));
e->accept();
}
// Call implementation from parent
DocumentWidget::mousePressEvent(e);
}
void DVIWidget::mouseMoveEvent(TQMouseEvent* e)
{
// pageNr == 0 indicated an invalid page (e.g. page number not yet set)
if (pageNr == 0)
return;
// Call the standard implementation
DocumentWidget::mouseMoveEvent(e);
// Analyze the mouse movement only if no mouse button was pressed
if ( e->state() == 0 ) {
// Get a pointer to the page contents
RenderedDviPagePixmap* pageData = dynamic_cast<RenderedDviPagePixmap*>(documentCache->getPage(pageNr));
if (pageData == 0) {
kdDebug(4300) << "DVIWidget::mouseMoveEvent(...) pageData for page #" << pageNr << " is empty" << endl;
return;
}
// Check if the cursor hovers over a sourceHyperlink.
for(unsigned int i=0; i<pageData->sourceHyperLinkList.size(); i++) {
if (pageData->sourceHyperLinkList[i].box.contains(e->pos())) {
clearStatusBarTimer.stop();
// The macro-package srcltx gives a special like "src:99 test.tex"
// while MikTeX gives "src:99test.tex". KDVI tries
// to understand both.
TQString cp = pageData->sourceHyperLinkList[i].linkText;
int max = cp.length();
int i;
for(i=0; i<max; i++)
if (cp[i].isDigit() == false)
break;
emit setStatusBarText( i18n("line %1 of %2").arg(cp.left(i)).arg(cp.mid(i).simplifyWhiteSpace()) );
return;
}
}
}
}
#include "dviWidget.moc"
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