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Cairo-Chart
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Kolan Sh 2018-01-19 15:13:28 +03:00
parent 26212825dd
commit 825f9ac978
1 changed files with 18 additions and 16 deletions
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34
src/Chart.vala
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@ -265,12 +265,15 @@ namespace CairoChart {
*/
public virtual void move (Point delta) {
var d = delta;
d.x /= -plarea.width;
d.y /= -plarea.height;
d.x /= -plarea.width; d.y /= -plarea.height;
var x0 = zoom.x, x1 = zoom.x + zoom.width, y0 = zoom.y, y1 = zoom.y + zoom.height;
zoom_out();
d.x *= plarea.width;
d.y *= plarea.height;
d.x *= plarea.width; d.y *= plarea.height;
var xmin = plarea.x + plarea.width * x0;
var xmax = plarea.x + plarea.width * x1;
var ymin = plarea.y + plarea.height * y0;
@ -280,19 +283,18 @@ namespace CairoChart {
var px1 = plarea.x + plarea.width;
var py1 = plarea.y + plarea.height;
var zrect = Cairo.Rectangle();
zrect.x = xmin + d.x;
zrect.y = ymin + d.y;
if (zrect.x < plarea.x) d.x = plarea.x - xmin;
if (xmax + d.x > px1) d.x = px1 - xmax;
if (zrect.y < plarea.y) d.y = plarea.y - ymin;
if (ymax + d.y > py1) d.y = py1 - ymax;
zrect.x = xmin + d.x;
zrect.y = ymin + d.y;
zrect.width = xmax - xmin;
zrect.height = ymax - ymin;
zoom_in (zrect);//Cairo.Rectangle(){x = xmindx, y = ymindx, width = xmax - xmin, height = ymax - ymin});
if (xmin + d.x < plarea.x) d.x = plarea.x - xmin;
if (xmax + d.x > px1) d.x = px1 - xmax;
if (ymin + d.y < plarea.y) d.y = plarea.y - ymin;
if (ymax + d.y > py1) d.y = py1 - ymax;
zoom_in(Cairo.Rectangle() {
x = xmin + d.x,
y = ymin + d.y,
width = xmax - xmin,
height = ymax - ymin
});
}
protected virtual void fix_evarea () {