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CircleMeter: gradient for regions and better colors

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This commit is contained in:
Louis-Joseph Fournier 2016-01-01 10:22:06 +01:00
parent c62a3a24a5
commit 591a5750a9
1 changed files with 15 additions and 6 deletions
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21
qml/CircleMeter.qml
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@ -14,7 +14,7 @@ Item {
/// numbers to write on the scale /// numbers to write on the scale
property variant marks: [-40, -20, 0, 20, 40] property variant marks: [-40, -20, 0, 20, 40]
/// marks regions colors /// marks regions colors
property variant region_color: ["red", "yellow", "green", "yellow", "red"] property variant region_color: ["#F88E48", "#F8DE48", "#99E882", "#F8DE48", "#F88E48"]
/// theme object /// theme object
property QtObject theme property QtObject theme
@ -150,15 +150,25 @@ Item {
property variant reg_drawed property variant reg_drawed
anchors.fill: parent anchors.fill: parent
property variant reg: find_region() property variant reg: find_region()
property double r_avg: (r_circle_min + r_circle_max) / 2
z: -4 z: -4
onPaint: { onPaint: {
var ctx = getContext('2d'); var ctx = getContext('2d');
ctx.clearRect(0,0,width,height) ctx.clearRect(0,0,width,height)
//var reg = find_region() var a0 = angle(marks[reg[0]]) // angle of mark
var a1 = angle(reg[1]) var a1 = angle(reg[1]) // min angle of region
var a2 = angle(reg[2]) var a2 = angle(reg[2]) // max angle of region
ctx.fillStyle = region_color[reg[0]]
// gradient
var x_center = getx(a0, r_avg);
var y_center = gety(a0, r_avg);
var grd = ctx.createRadialGradient(x_center, y_center, 2, x_center, y_center,
(reg[2] - reg[1]) * (width + height) / 2 / (max - min))
grd.addColorStop(0, region_color[reg[0]])
grd.addColorStop(1, "transparent")
ctx.fillStyle = grd
ctx.beginPath() ctx.beginPath()
ctx.moveTo(getx(a1, r_circle_min), gety(a1, r_circle_min)) ctx.moveTo(getx(a1, r_circle_min), gety(a1, r_circle_min))
arc_part(ctx, r_circle_min, a1, a2) arc_part(ctx, r_circle_min, a1, a2)
@ -166,7 +176,6 @@ Item {
ctx.lineTo(getx(a1, r_circle_min), gety(a1, r_circle_min)) ctx.lineTo(getx(a1, r_circle_min), gety(a1, r_circle_min))
ctx.fill() ctx.fill()
reg_drawed = reg reg_drawed = reg
console.log("redraw")
} }
function update_level() { function update_level() {