1 files changed, 298 insertions, 0 deletions
diff --git a/kexi/widget/relations/kexirelationviewconnection.cpp b/kexi/widget/relations/kexirelationviewconnection.cpp
new file mode 100644
index 00000000..2c27de87
--- /dev/null
+++ b/kexi/widget/relations/kexirelationviewconnection.cpp
@@ -0,0 +1,298 @@
+/* This file is part of the KDE project
+   Copyright (C) 2004 Lucijan Busch <[email protected]>
+   Copyright (C) 2004-2005 Jaroslaw Staniek <[email protected]>
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this program; see the file COPYING.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+*/
+
+#include <qpainter.h>
+#include <qpixmap.h>
+#include <qcolor.h>
+#include <qapplication.h>
+#include <qpointarray.h>
+
+#include <kdebug.h>
+
+#include <math.h>
+
+#include "kexirelationview.h"
+#include "kexirelationviewtable.h"
+#include "kexirelationviewconnection.h"
+#include <kexidb/tableschema.h>
+#include <kexidb/utils.h>
+#include <core/kexi.h>
+
+//#include "r1.xpm"
+//#include "rn.xpm"
+
+KexiRelationViewConnection::KexiRelationViewConnection(
+	KexiRelationViewTableContainer *masterTbl, KexiRelationViewTableContainer *detailsTbl, 
+	SourceConnection &c, KexiRelationView *parent)
+{
+	m_parent = parent;
+//	kdDebug() << "KexiRelationViewConnection::KexiRelationViewConnection()" << endl;
+
+	m_masterTable = masterTbl;
+	if(!masterTbl || !detailsTbl)
+	{
+		kdDebug() << "KexiRelationViewConnection::KexiRelationViewConnection(): expect sig11" << endl;
+		kdDebug() << "KexiRelationViewConnection::KexiRelationViewConnection()" << masterTbl << endl;
+		kdDebug() << "KexiRelationViewConnection::KexiRelationViewConnection()" << detailsTbl << endl;
+	}
+
+	m_detailsTable = detailsTbl;
+	m_masterField = c.masterField;
+	m_detailsField = c.detailsField;
+
+	m_selected = false;
+}
+
+KexiRelationViewConnection::~KexiRelationViewConnection()
+{
+}
+
+void
+KexiRelationViewConnection::drawConnection(QPainter *p)
+{
+	p->setPen(m_parent->palette().active().foreground());
+	int sx = m_masterTable->x() + m_masterTable->width() + m_parent->contentsX();
+	int sy = m_masterTable->globalY(m_masterField);
+	int rx = m_detailsTable->x() + m_parent->contentsX();
+	int ry = m_detailsTable->globalY(m_detailsField);
+
+	QFont f( Kexi::smallFont( m_parent ) );
+	QFontMetrics fm(f);
+	int side1x=0, side1y=sy - fm.height(), 
+		sideNx=0, sideNy=ry - fm.height();
+//! @todo details char can be also just a '1' for some cases
+	QChar sideNChar(0x221E); //infinity char
+	uint sideNCharWidth = 2+2+ fm.width( sideNChar );
+	QChar side1Char('1');
+	uint side1CharWidth = 2+2+ fm.width( side1Char );
+	p->setBrush(p->pen().color());
+
+	if(m_masterTable->x() < m_detailsTable->x())
+	{
+		//det. side
+		p->drawLine(rx - sideNCharWidth, ry, rx, ry);
+		QPointArray pa(3);
+		pa.setPoint(0, rx - 4, ry - 3);
+		pa.setPoint(1, rx - 4, ry + 3);
+		pa.setPoint(2, rx - 1, ry);
+		p->drawPolygon(pa, true);
+		
+		//master side
+		p->drawLine(sx, sy - 1, sx + side1CharWidth -1, sy - 1);
+		p->drawLine(sx, sy, sx + side1CharWidth -1, sy);
+		p->drawLine(sx, sy + 1, sx + side1CharWidth -1, sy + 1);
+
+		side1x = sx;
+//		side1y = sy - 7;
+
+		sideNx = rx - sideNCharWidth - 1;
+//		sideNy = ry - 6;
+
+		QPen pen(p->pen());
+		if(m_selected)
+		{
+			QPen pen(p->pen());
+			pen.setWidth(2);
+			p->setPen(pen);
+		}
+
+		p->drawLine(sx + side1CharWidth, sy, rx - sideNCharWidth, ry);
+
+		if(m_selected)
+		{
+			QPen pen(p->pen());
+			pen.setWidth(1);
+			p->setPen(pen);
+		}
+
+	}
+	else
+	{
+		int lx = rx + m_detailsTable->width();
+		int rx = sx - m_masterTable->width();
+
+		//det. side
+		p->drawLine(lx, ry, lx + sideNCharWidth, ry);
+		QPointArray pa(3);
+		pa.setPoint(0, lx + 3, ry - 3);
+		pa.setPoint(1, lx + 3, ry + 3);
+		pa.setPoint(2, lx, ry);
+		p->drawPolygon(pa, true);
+		
+//		p->drawLine(lx, ry, lx + 8, ry);
+//		p->drawPoint(lx + 1, ry - 1);
+//		p->drawPoint(lx + 1, ry + 1);
+//		p->drawLine(lx + 2, ry - 2, lx + 2, ry + 2);
+
+		//master side
+		p->drawLine(rx - side1CharWidth +1, sy - 1, rx, sy - 1);
+		p->drawLine(rx - side1CharWidth +1, sy + 1, rx, sy + 1);
+		p->drawLine(rx - side1CharWidth +1, sy, rx, sy);
+
+		side1x = rx - side1CharWidth;
+//		side1y = sy - 7;
+
+		sideNx = lx + 1;
+//		sideNy = ry - 6;
+
+		if(m_selected)
+		{
+			QPen pen(p->pen());
+			pen.setWidth(2);
+			p->setPen(pen);
+		}
+
+		p->drawLine(lx + sideNCharWidth, ry, rx - side1CharWidth, sy);
+
+		if(m_selected)
+		{
+			QPen pen(p->pen());
+			pen.setWidth(1);
+			p->setPen(pen);
+		}
+	}
+
+	p->drawText(side1x, side1y, side1CharWidth, fm.height(), Qt::AlignCenter, side1Char);
+	p->drawText(sideNx, sideNy, sideNCharWidth, fm.height(), Qt::AlignCenter, sideNChar);
+	//p->drawRect(QRect(connectionRect().topLeft(), QSize(50,50)));
+//	p->drawPixmap(side1, QPixmap(r1_xpm));
+//	p->drawPixmap(sideN, QPixmap(rn_xpm));
+}
+
+const QRect
+KexiRelationViewConnection::connectionRect()
+{
+	int sx = m_masterTable->x() + m_parent->contentsX();
+	int rx = m_detailsTable->x() + m_parent->contentsX();
+	int ry = m_detailsTable->globalY(m_detailsField);
+	int sy = m_masterTable->globalY(m_masterField);
+
+	int width, leftX, rightX;
+
+	if(sx < rx)
+	{
+		leftX = sx;
+		rightX = rx;
+		width = m_masterTable->width();
+	}
+	else
+	{
+		leftX = rx;
+		rightX = sx;
+		width = m_detailsTable->width();
+	}
+
+
+	int dx = QABS((leftX + width) - rightX);
+	int dy = QABS(sy - ry) + 2;
+
+	int top = QMIN(sy, ry);
+	int left = leftX + width;
+
+
+//	return QRect(sx - 1, sy - 1, (rx + m_detailsTable->width()) - sx + 1, ry - sy + 1);
+	QRect rect(left - 150, top - 150, dx + 150, dy + 150);
+//	kdDebug() << "KexiRelationViewConnection::connectionRect():" << m_oldRect << "," << rect << endl;
+	
+	m_oldRect = rect;
+
+	return rect;
+}
+
+bool
+KexiRelationViewConnection::matchesPoint(const QPoint &p, int tolerance)
+{
+	QRect we = connectionRect();
+
+	if(!we.contains(p))
+		return false;
+
+	/** get our coordinats
+	 *  you know what i mean the x1, y1 is the top point
+	 *  and the x2, y2 is the bottom point
+	 *  (quite tirvial :) although that was the entrace to the magic
+	 *  gate...
+	 */
+
+	int sx = m_masterTable->x() + m_masterTable->width();
+	int sy = m_masterTable->globalY(m_masterField);
+	int rx = m_detailsTable->x();
+	int ry = m_detailsTable->globalY(m_detailsField);
+
+	int x1 = sx + 8;
+	int y1 = sy;
+	int x2 = rx - 8;
+	int y2 = ry;
+
+	if(sx > rx)
+	{
+		x1 = m_detailsTable->x() + m_detailsTable->width();
+		x2 = m_masterTable->x();
+		y2 = sy;
+		y1 = ry;
+	}
+
+	/*
+	  here we call pythagoras (the greek math geek :p)
+	  see: http://w1.480.telia.com/%7Eu48019406/geekporn.gif if you don't know
+	  how these people have got sex :)
+	 */
+	float mx = x2-x1;
+	float my = y2-y1;
+	float mag = sqrt(mx * mx + my * my);
+	float u = (((p.x() - x1)*(x2 - x1))+((p.y() - y1)*(y2 - y1)))/(mag * mag);
+	kdDebug() << "KexiRelationViewConnection::matchesPoint(): u: " << u << endl;
+
+	float iX = x1 + u * (x2 - x1);
+	float iY = y1 + u * (y2 - y1);
+	kdDebug() << "KexiRelationViewConnection::matchesPoint(): px: " << p.x() << endl;
+	kdDebug() << "KexiRelationViewConnection::matchesPoint(): py: " << p.y() << endl;
+	kdDebug() << "KexiRelationViewConnection::matchesPoint(): ix: " << iX << endl;
+	kdDebug() << "KexiRelationViewConnection::matchesPoint(): iy: " << iY << endl;
+
+	float dX = iX - p.x();
+	float dY = iY - p.y();
+
+	kdDebug() << "KexiRelationViewConnection::matchesPoint(): dx: " << dX << endl;
+	kdDebug() << "KexiRelationViewConnection::matchesPoint(): dy: " << dY << endl;
+
+	float distance = sqrt(dX * dX + dY * dY);
+	kdDebug() << "KexiRelationViewConnection::matchesPoint(): distance: " << distance << endl;
+
+	if(distance <= tolerance)
+		return true;
+
+	return false;
+}
+
+QString
+KexiRelationViewConnection::toString() const
+{
+	QString str;
+/*! @todo what about query? */
+	if (m_masterTable && m_masterTable->schema()->table()) {
+		str += (QString(m_masterTable->schema()->name()) + "." + m_masterField);
+	}
+	if (m_detailsTable && m_detailsTable->schema()->table()) {
+		str += " - ";
+		str += (QString(m_detailsTable->schema()->name()) + "." + m_detailsField);
+	}
+	return str;
+}