#include "painter.h"
+#define BACKGROUND_MAX_SIZE 512
+
+
DrawingView::DrawingView(QWidget * parent/*= NULL*/): QWidget(parent),
// The value in the settings file will override this.
useAntialiasing(true),
- gridBackground(512, 512),
+ gridBackground(BACKGROUND_MAX_SIZE, BACKGROUND_MAX_SIZE),
scale(1.0), offsetX(-10), offsetY(-10),
document(Vector(0, 0)),
-// gridSpacing(32.0), collided(false), rotateTool(false), rx(150.0), ry(150.0),
- gridSpacing(12.0), collided(false), rotateTool(false), rx(150.0), ry(150.0),
+ gridSpacing(12.0), gridPixels(0), collided(false), rotateTool(false),
+ rx(150.0), ry(150.0),
scrollDrag(false), addLineTool(false), addCircleTool(false),
addDimensionTool(false),
-// selectionInProgress(false),
toolAction(NULL)
{
document.isTopLevelContainer = true;
this. Maybe this is the case for having a base unit and basing point sizes off
of that.
+Here's what's been figured out. Painter::zoom is simply the ratio of pixels to
+base units. What that means is that if you have a 12px grid with a 6" grid size
+(& base unit of "inches"), Painter::zoom becomes 12px / 6" = 2.0 px/in.
+
+Dimensions now have a "size" parameter to set their absolute size in relation
+to the base unit. ATM, the arrows are drawn in pixels, but also scaled by
+Painter::zoom *and* size. Same with the dimension text; it's drawn at 10pt and
+scaled the same way as the arrowheads.
+
+Need a way to scale line widths as well. :-/ Shouldn't be too difficult, just
+need a thickness parameter similar to the "size" param for dimensions.
*/
+#if 0
QPainter pmp(&gridBackground);
- pmp.fillRect(0, 0, 512, 512, QColor(240, 240, 240));
+ pmp.fillRect(0, 0, BACKGROUND_MAX_SIZE, BACKGROUND_MAX_SIZE, QColor(240, 240, 240));
pmp.setPen(QPen(QColor(210, 210, 255), 2.0, Qt::SolidLine));
- for(int i=0; i<511; i+=12)
+ for(int i=0; i<(BACKGROUND_MAX_SIZE-1); i+=12)
{
- pmp.drawLine(i, 0, i, 511);
- pmp.drawLine(0, i, 511, i);
+ pmp.drawLine(i, 0, i, BACKGROUND_MAX_SIZE - 1);
+ pmp.drawLine(0, i, BACKGROUND_MAX_SIZE - 1, i);
}
pmp.end();
UpdateGridBackground();
+#else
+ SetGridSize(12);
+#endif
}
}
+void DrawingView::SetGridSize(uint32_t size)
+{
+ // Sanity check
+ if (size == gridPixels)
+ return;
+
+ // Recreate the background bitmap
+ gridPixels = size;
+ QPainter pmp(&gridBackground);
+ pmp.fillRect(0, 0, BACKGROUND_MAX_SIZE, BACKGROUND_MAX_SIZE, QColor(240, 240, 240));
+ pmp.setPen(QPen(QColor(210, 210, 255), 2.0, Qt::SolidLine));
+
+ for(int i=0; i<(BACKGROUND_MAX_SIZE-1); i+=gridPixels)
+ {
+ pmp.drawLine(i, 0, i, BACKGROUND_MAX_SIZE - 1);
+ pmp.drawLine(0, i, BACKGROUND_MAX_SIZE - 1, i);
+ }
+
+ pmp.end();
+
+ // Set up new BG brush & zoom level (pixels per base unit)
+ Painter::zoom = gridPixels / gridSpacing;
+ UpdateGridBackground();
+}
+
+
void DrawingView::UpdateGridBackground(void)
{
-//was: 128
-#define BG_BRUSH_SPAN 72
// Transform the origin to Qt coordinates
Vector pixmapOrigin = Painter::CartesianToQtCoords(Vector());
int x = (int)pixmapOrigin.x;
int y = (int)pixmapOrigin.y;
// Use mod arithmetic to grab the correct swatch of background
- // Problem with mod 128: Negative numbers screw it up... [FIXED]
- x = (x < 0 ? 0 : BG_BRUSH_SPAN - 1) - (x % BG_BRUSH_SPAN);
- y = (y < 0 ? 0 : BG_BRUSH_SPAN - 1) - (y % BG_BRUSH_SPAN);
+/*
+Negative numbers still screw it up... Need to think about what we're
+trying to do here. The fact that it worked with 72 seems to have been pure luck.
+It seems the problem is negative numbers: We can't let that happen.
+When taking away the zero, it pops over 1 px at zero, then goes about 1/2 a
+grid at x<0.
+
+The bitmap looks like this:
+
++---+---+---+---+---
+| | | | |
+| | | | |
++---+---+---+---+---
+| | | | |
+| | | | |
+| | | | |
+
+@ x = 1, we want it to look like:
+
+-+---+---+---+---+---
+ | | | | |
+ | | | | |
+-+---+---+---+---+---
+ | | | | |
+ | | | | |
+ | | | | |
+
+Which means we need to grab the sample from x = 3. @ x = -1:
+
+---+---+---+---+---
+ | | | |
+ | | | |
+---+---+---+---+---
+ | | | |
+ | | | |
+ | | | |
+
+Which means we need to grab the sample from x = 1. Which means we have to take
+the mirror of the modulus of gridPixels.
+
+Doing a mod of a negative number is problematic: 1st, the compiler converts the
+negative number to an unsigned int, then it does the mod. Gets you wrong answers
+most of the time, unless you use a power of 2. :-P So what we do here is just
+take the modulus of the negation, which means we don't have to worry about
+mirroring it later.
+
+The positive case looks gruesome (and it is) but it boils down to this: We take
+the modulus of the X coordinate, then mirror it by subtraction from the
+maximum (in this case, gridPixels). This gives us a number in the range of 1 to
+gridPixels. But we need the case where the result equalling gridPixels to be
+zero; so we do another modulus operation on the result to achieve this.
+*/
+ if (x < 0)
+ x = -x % gridPixels;
+ else
+ x = (gridPixels - (x % gridPixels)) % gridPixels;
+
+ if (y < 0)
+ y = -y % gridPixels;
+ else
+ y = (gridPixels - (y % gridPixels)) % gridPixels;
// Here we grab a section of the bigger pixmap, so that the background
// *looks* like it's scrolling...
- QPixmap pm = gridBackground.copy(x, y, BG_BRUSH_SPAN, BG_BRUSH_SPAN);
+ QPixmap pm = gridBackground.copy(x, y, gridPixels, gridPixels);
QPalette pal = palette();
pal.setBrush(backgroundRole(), QBrush(pm));
setAutoFillBackground(true);
if (useAntialiasing)
qtPainter.setRenderHint(QPainter::Antialiasing);
- Painter::screenSize = Vector(size().width(), size().height());
+// Painter::screenSize = Vector(size().width(), size().height());
Object::SetViewportHeight(size().height());
// Draw coordinate axes
}
+void DrawingView::resizeEvent(QResizeEvent * /*event*/)
+{
+ Painter::screenSize = Vector(size().width(), size().height());
+ UpdateGridBackground();
+}
+
+
void DrawingView::mousePressEvent(QMouseEvent * event)
{
if (event->button() == Qt::LeftButton)
projects / architektonas / blobdiff