qsteprint.cpp

来自「porting scintilla to qt」· C++ 代码 · 共 167 行

#include <qprinter.h>
#include <qstack.h>
#include <qpainter.h>
#include <QAbstractScrollArea>
#include <qpoint.h>
#include <ctype.h>
#include <stdlib.h>
#include <QScrollBar>
#include <QMouseEvent>

#include "SciLexer.h"
#include "qsteprint.h"
#include "qsteeditor.h"
QStePrint::QStePrint(QSteEditor *editor,QPrinter *qprinter,QWidget *parent):QAbstractScrollArea(parent),m_editor(editor),m_printer(qprinter)
{
	initialize();
}
QStePrint::~QStePrint()
{
}
void QStePrint::zoomIn(int degree)
{
}
void QStePrint::zoomOut(int degree)
{
}
void QStePrint::focusInEvent(QFocusEvent *event)
{
}
void QStePrint::focusOutEvent(QFocusEvent *event)
{
}
bool QStePrint::focusNextPrevChild(bool next)
{
}
void QStePrint::keyPressEvent(QKeyEvent *event)
{
}
void QStePrint::inputMethodEvent(QInputMethodEvent *event)
{
}
void QStePrint::mouseDoubleClickEvent(QMouseEvent *event)
{
}
void QStePrint::mouseMoveEvent(QMouseEvent *e)
{
    if (mousePressPos.isNull()) {
        e->ignore();
        return;
    }
    horizontalScrollBar()->setValue(scrollBarValuesOnMousePress.x() - e->pos().x() + mousePressPos.x());
    verticalScrollBar()->setValue(scrollBarValuesOnMousePress.y() - e->pos().y() + mousePressPos.y());
    horizontalScrollBar()->update();
    verticalScrollBar()->update();
    e->accept();
}
void QStePrint::mousePressEvent(QMouseEvent *e)
{
    mousePressPos = e->pos();
    scrollBarValuesOnMousePress.rx() = horizontalScrollBar()->value();
    scrollBarValuesOnMousePress.ry() = verticalScrollBar()->value();
    e->accept();
}
void QStePrint::mouseReleaseEvent(QMouseEvent *e)
{
    mousePressPos = QPoint();
    e->accept();
}
void QStePrint::paintEvent(QPaintEvent *event)
{
	if(m_editor == NULL || m_printer == NULL)
		return;
	QPrinter *printer = m_printer;
	int mag = 0;
	int wrap = SC_WRAP_WORD;
    // Setup the printing area from parameter in printer
    QRect def_area;
 	//int right = printer->paperRect().right() - printer->pageRect().right();
	//int bottom = printer->paperRect().bottom() - printer->pageRect().bottom();
	int left= printer->paperRect().left() - printer->pageRect().left();
  	int top= printer->paperRect().top() - printer->pageRect().top();
	def_area.setY(10);
	def_area.setX(20);
	def_area.setWidth(printer->width() - left * 2);
	def_area.setHeight(printer->height() - top * 2);

    // Get the page range.
    int pgfrom, pgto;
    pgfrom = printer->fromPage();
    pgto = printer->toPage();
    // Find the position range.
    long startpos, endpos;

    endpos = m_editor->sendMsgToSci(SCI_GETLENGTH);
    startpos = 0;

	QPainter painter(viewport());
	bool reverse = (printer->pageOrder() == QPrinter::LastPageFirst);
	bool neednewpage = false;
    m_editor->sendMsgToSci(SCI_SETPRINTMAGNIFICATION,0);
	m_editor->sendMsgToSci(SCI_SETPRINTWRAPMODE,wrap);
	for(int i = 1;i <= printer->numCopies();i++){
		QStack<long> pagestarts;
		int currpage = 1;
		long pos = startpos;
		while(pos < endpos){
			if(pgto > 0 && pgto < currpage)
				break;
			bool render = false;
			if(pgfrom == 0 || pgfrom <= currpage){
				if(reverse){
					pagestarts.push(pos);
				}else{
					render = true;
					if(neednewpage){
						if(!printer->newPage())
							return;
					}else{
						neednewpage = true;
					}
				}
			}	
			QRect area = def_area;
//			printer->formatPage(painter,render,area,currpage);
			pos = m_editor->sendMsgToSci(SCI_FORMATRANGE,render,&painter,area,pos,endpos);
			currpage++;
		}
		if(!reverse)
			continue;
		while(!pagestarts.isEmpty()){
			--currpage;
			long epos = pos;
			pos = pagestarts.pop();
			if(neednewpage){
				if(!printer->newPage()){
					return;
				}
			}else{
				neednewpage = true;
			}
			QRect area = def_area;
//			printer->formatPage(painter,true,area,currpage);
			m_editor->sendMsgToSci(SCI_FORMATRANGE,true,&painter,area,pos,epos);
		}
	}
}
void QStePrint::resizeEvent(QResizeEvent *event)
{
}
void QStePrint::scrollContentsBy(int dx,int dy)
{
}
void QStePrint::initialize()
{
    verticalScrollBar()->setSingleStep(20);
    horizontalScrollBar()->setSingleStep(20);

    viewport()->setBackgroundRole(QPalette::Dark);
	verticalScrollBar()->setValue(10);
	horizontalScrollBar()->setValue(10);
	verticalScrollBar()->setMinimum(10);
	horizontalScrollBar()->setMinimum(0);
	verticalScrollBar()->setMaximum(1000);
	horizontalScrollBar()->setMaximum(10000);
}