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