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And finished the histogram example.

This commit is contained in:
Pietro Gagliardi 2018-08-20 10:09:53 -04:00
parent 7d83b8ad37
commit 4b38b1621a
1 changed files with 24 additions and 30 deletions
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54
zz_histogram.go
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@ -12,8 +12,11 @@ import (
) )
var ( var (
histogram *ui.Area
datapoints [10]*ui.Spinbox datapoints [10]*ui.Spinbox
colorButton *ui.ColorButton colorButton *ui.ColorButton
currentPoint = -1
) )
// some metrics // some metrics
@ -117,7 +120,7 @@ func (areaHandler) Draw(a *ui.Area, p *ui.AreaDrawParams) {
// now transform the coordinate space so (0, 0) is the top-left corner of the graph // now transform the coordinate space so (0, 0) is the top-left corner of the graph
m := ui.NewMatrix() m := ui.NewMatrix()
m.Translate(xoffLeft, yoffTop); m.Translate(xoffLeft, yoffTop)
p.Context.Transform(m) p.Context.Transform(m)
// now get the color for the graph itself and set up the brush // now get the color for the graph itself and set up the brush
@ -140,24 +143,20 @@ func (areaHandler) Draw(a *ui.Area, p *ui.AreaDrawParams) {
p.Context.Stroke(path, brush, sp) p.Context.Stroke(path, brush, sp)
path.Free() path.Free()
/*
// now draw the point being hovered over // now draw the point being hovered over
if (currentPoint != -1) { if currentPoint != -1 {
double xs[10], ys[10]; xs, ys := pointLocations(graphWidth, graphHeight)
path = ui.NewPath(ui.Winding)
pointLocations(graphWidth, graphHeight, xs, ys); path.NewFigureWithArc(
path = uiDrawNewPath(uiDrawFillModeWinding);
uiDrawPathNewFigureWithArc(path,
xs[currentPoint], ys[currentPoint], xs[currentPoint], ys[currentPoint],
pointRadius, pointRadius,
0, 6.23, // TODO pi 0, 6.23, // TODO pi
0); false)
uiDrawPathEnd(path); path.End()
// use the same brush as for the histogram lines // use the same brush as for the histogram lines
uiDrawFill(p->Context, path, &brush); p.Context.Fill(path, brush)
uiDrawFreePath(path); path.Free()
} }
*/
} }
func inPoint(x, y float64, xtest, ytest float64) bool { func inPoint(x, y float64, xtest, ytest float64) bool {
@ -171,24 +170,19 @@ func inPoint(x, y float64, xtest, ytest float64) bool {
} }
func (areaHandler) MouseEvent(a *ui.Area, me *ui.AreaMouseEvent) { func (areaHandler) MouseEvent(a *ui.Area, me *ui.AreaMouseEvent) {
/* graphWidth, graphHeight := graphSize(me.AreaWidth, me.AreaHeight)
double graphWidth, graphHeight; xs, ys := pointLocations(graphWidth, graphHeight)
double xs[10], ys[10];
int i;
graphSize(e->AreaWidth, e->AreaHeight, &graphWidth, &graphHeight); currentPoint = -1
pointLocations(graphWidth, graphHeight, xs, ys); for i := 0; i < 10; i++ {
if inPoint(me.X, me.Y, xs[i], ys[i]) {
currentPoint = i
break
}
}
for (i = 0; i < 10; i++)
if (inPoint(e->X, e->Y, xs[i], ys[i]))
break;
if (i == 10) // not in a point
i = -1;
currentPoint = i;
// TODO only redraw the relevant area // TODO only redraw the relevant area
uiAreaQueueRedrawAll(histogram); histogram.QueueRedrawAll()
*/
} }
func (areaHandler) MouseCrossed(a *ui.Area, left bool) { func (areaHandler) MouseCrossed(a *ui.Area, left bool) {
@ -225,7 +219,7 @@ func setupUI() {
vbox.SetPadded(true) vbox.SetPadded(true)
hbox.Append(vbox, false) hbox.Append(vbox, false)
histogram := ui.NewArea(areaHandler{}) histogram = ui.NewArea(areaHandler{})
rand.Seed(time.Now().Unix()) rand.Seed(time.Now().Unix())
for i := 0; i < 10; i++ { for i := 0; i < 10; i++ {
@ -239,7 +233,7 @@ func setupUI() {
colorButton = ui.NewColorButton() colorButton = ui.NewColorButton()
// TODO inline these // TODO inline these
brush := mkSolidBrush(colorDodgerBlue, 1.0); brush := mkSolidBrush(colorDodgerBlue, 1.0)
colorButton.SetColor(brush.R, colorButton.SetColor(brush.R,
brush.G, brush.G,
brush.B, brush.B,