Fix zoom to zoom in/out from the center.

[ttedit] / src / editwindow.cpp

diff --git a/src/editwindow.cpp b/src/editwindow.cpp
old mode 100755 (executable)
new mode 100644 (file)
index 93757ce..4a3d43f
--- a/src/editwindow.cpp
+++ b/src/editwindow.cpp
@@ -43,10 +43,9 @@
 
 
 EditWindow::EditWindow(QWidget * parent/*= NULL*/): QWidget(parent),
-       scale(1.0), offsetX(-10), offsetY(-10), tool(TOOLSelect),
-       ptHighlight(-1), oldPtHighlight(-1), ptNextHighlight(-1), oldPtNextHighlight(-1),
-       polyFirstPoint(true), showRotationCenter(false), haveZeroPoint(false),
-       selectionInProgress(false)
+       tool(TOOLSelect), ptHighlight(-1), oldPtHighlight(-1), ptNextHighlight(-1),
+       oldPtNextHighlight(-1), polyFirstPoint(true), showRotationCenter(false),
+       haveZeroPoint(false), selectionInProgress(false)
 {
        setBackgroundRole(QPalette::Base);
        setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
@@ -81,29 +80,11 @@ void EditWindow::CreateCursors(void)
 
        for(int i=0; i<12; i++)
        {
-               QString s;
-               s.sprintf(":/res/cursor-%s.png", cursorName[i]);
-               QPixmap pmTmp(s);
+               QPixmap pmTmp(QString(":/res/cursor-%1.png").arg(cursorName[i]));
                cur[i] = QCursor(pmTmp, hotx[i], hoty[i]);
        }
 }
 
-#if 0
-QPoint EditWindow::GetAdjustedMousePosition(QMouseEvent * event)
-{
-       // This is undoing the transform, e.g. going from client coords to local
-       // coords. In essence, the height - y is height + (y * -1), the (y * -1)
-       // term doing the conversion of the y-axis from increasing bottom to top.
-       return QPoint(offsetX + event->x(), offsetY + (size().height() - event->y()));
-}
-
-
-QPoint EditWindow::GetAdjustedClientPosition(int x, int y)
-{
-       // VOODOO ALERT (ON Y COMPONENT!!!!)
-       return QPoint(-offsetX + x, (size().height() - (-offsetY + y)) * +1.0);
-}
-#endif
 
 /*
 TODO:
@@ -118,27 +99,12 @@ void EditWindow::paintEvent(QPaintEvent * /*event*/)
        Painter painter(&qtp);
        painter.SetRenderHint(QPainter::Antialiasing);
 
-       Global::zoom = scale;
-       Global::origin = Vector(offsetX, offsetY);
        Global::viewportHeight = size().height();
        Global::screenSize = Vector(size().width(), size().height());
-//     p.translate(QPoint(-offsetX, size().height() - (-offsetY)));
-//     p.scale(1.0, -1.0);
-//Nope, a big load of shit. So we'll have to bite the bullet and do it the
-//hard way™.
-//     p.scale(scale, -scale);
-
-// Scrolling can be done by using OffsetViewportOrgEx
-// Scaling can be done by adjusting SetWindowExtEx (it's denominator of txform)
-// you'd use: % = ViewportExt / WindowExt
-// But it makes the window look like crap: fuggetuboutit.
-// Instead, we have to scale EVERYTHING by hand. Crap!
-// It's not *that* bad, but not as convenient either...
-
-       painter.SetPen(QPen(Qt::blue, 1.0, Qt::DotLine));
 
        // Draw coordinate axes
 
+       painter.SetPen(QPen(Qt::blue, 1.0, Qt::DotLine));
        painter.DrawLine(0, -16384, 0, 16384);
        painter.DrawLine(-16384, 0, 16384, 0);
 
@@ -433,7 +399,7 @@ WriteLogMsg(" --> [# polys: %u, # points: %u]\n", pts.GetNumPolys(), pts.GetNumP
                        {
 //                             pt = GetAdjustedClientPosition(pts.GetX(ptHighlight), pts.GetY(ptHighlight));
                                Vector pt = Painter::CartesianToQtCoords(Vector(pts.GetX(ptHighlight), pts.GetY(ptHighlight)));
-//printf("GetAdjustedClientPosition = %i, %i\n", pt.x(), pt.y());
+//printf("GetAdjustedClientPosition = %lf, %lf\n", pt.x, pt.y);
                                QPoint warp(pt.x, pt.y);
                                QCursor::setPos(mapToGlobal(warp));
 
@@ -459,9 +425,9 @@ WriteLogMsg(" --> [# polys: %u, # points: %u]\n", pts.GetNumPolys(), pts.GetNumP
                else if (tool == TOOLRotate)
                {
                        // I think what's needed here is to keep the initial mouse click,
-                       // paint the rotation center, then use the 1st mouse move event to establish
-                       // the rotation "zero line", which becomes the line of reference to all
-                       // subsequent mouse moves.
+                       // paint the rotation center, then use the 1st mouse move event to
+                       // establish the rotation "zero line", which becomes the line of
+                       // reference to all subsequent mouse moves.
 //                     rotationCenter = GetAdjustedMousePosition(event);
                        rotationCenter = Painter::QtToCartesianCoords(Vector(event->x(), event->y()));
                        showRotationCenter = true;
@@ -513,14 +479,15 @@ void EditWindow::mouseMoveEvent(QMouseEvent * event)
                // Calc offset from previous point
                Vector pt(event->x(), event->y());
                pt /= Global::zoom;
-               ptOffset = Vector(pt.x - ptPrevious.x, pt.y - ptPrevious.y);
+               ptOffset = Vector(pt.x - ptPrevious.x, -(pt.y - ptPrevious.y));
 
 // Then multiply it by the scaling factor. Whee!
                // This looks wacky because we're using screen coords for the offset...
                // Otherwise, we would subtract both offsets!
-               offsetX -= ptOffset.x, offsetY += ptOffset.y;
-               update();
+//             offsetX -= ptOffset.x, offsetY += ptOffset.y;
+               Global::origin -= ptOffset;
                ptPrevious = pt;
+               update();
        }
        else if (event->buttons() == Qt::LeftButton)
        {