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Cairo-Chart
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Kolan Sh 2018-01-19 16:04:16 +03:00
parent 6e09e42b95
commit 036d9db437
1 changed files with 14 additions and 14 deletions
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src/Chart.vala
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@ -268,32 +268,32 @@ namespace CairoChart {
d.x /= -plarea.width; d.y /= -plarea.height; d.x /= -plarea.width; d.y /= -plarea.height;
var z0 = zoom; var z = zoom;
zoom_out(); zoom_out();
d.x *= plarea.width; d.y *= plarea.height; d.x *= plarea.width; d.y *= plarea.height;
var xmin = plarea.x + plarea.width * z0.x; var x0 = plarea.x + plarea.width * z.x;
var xmax = plarea.x + plarea.width * (z0.x + z0.width); var x1 = plarea.x + plarea.width * (z.x + z.width);
var ymin = plarea.y + plarea.height * z0.y; var y0 = plarea.y + plarea.height * z.y;
var ymax = plarea.y + plarea.height * (z0.y + z0.height); var y1 = plarea.y + plarea.height * (z.y + z.height);
d.x *= z0.width; d.y *= z0.height; d.x *= z.width; d.y *= z.height;
var px1 = plarea.x + plarea.width; var px1 = plarea.x + plarea.width;
var py1 = plarea.y + plarea.height; var py1 = plarea.y + plarea.height;
if (xmin + d.x < plarea.x) d.x = plarea.x - xmin; if (x0 + d.x < plarea.x) d.x = plarea.x - x0;
if (xmax + d.x > px1) d.x = px1 - xmax; if (x1 + d.x > px1) d.x = px1 - x1;
if (ymin + d.y < plarea.y) d.y = plarea.y - ymin; if (y0 + d.y < plarea.y) d.y = plarea.y - y0;
if (ymax + d.y > py1) d.y = py1 - ymax; if (y1 + d.y > py1) d.y = py1 - y1;
zoom_in(Cairo.Rectangle() { zoom_in(Cairo.Rectangle() {
x = xmin + d.x, x = x0 + d.x,
y = ymin + d.y, y = y0 + d.y,
width = plarea.width * z0.width, width = plarea.width * z.width,
height = plarea.height * z0.height height = plarea.height * z.height
}); });
} }