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体验新版 GitCode,发现更多精彩内容 >>
提交
b38ba93f
编写于
8月 22, 2017
作者:
N
Nicola Fiori (JD342)
浏览文件
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浏览文件
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电子邮件补丁
差异文件
Add smooth scroll on mousewheel with new heuristic
上级
3b433ea2
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
23 addition
and
1 deletion
+23
-1
src/vs/base/browser/ui/scrollbar/scrollableElement.ts
src/vs/base/browser/ui/scrollbar/scrollableElement.ts
+23
-1
未找到文件。
src/vs/base/browser/ui/scrollbar/scrollableElement.ts
浏览文件 @
b38ba93f
...
...
@@ -22,6 +22,9 @@ import Event, { Emitter } from 'vs/base/common/event';
const
HIDE_TIMEOUT
=
500
;
const
SCROLL_WHEEL_SENSITIVITY
=
50
;
const
SCROLL_WHEEL_SMOOTH_SCROLL_ENABLED
=
true
;
const
SCROLL_WHEEL_SMOOTH_SCROLL_MS_TIME_TRESHOLD
=
4
;
const
SCROLL_WHEEL_SMOOTH_SCROLL_PX_SPACE_TRESHOLD
=
7
;
export
interface
IOverviewRulerLayoutInfo
{
parent
:
HTMLElement
;
...
...
@@ -44,6 +47,8 @@ export abstract class AbstractScrollableElement extends Widget {
private
_mouseWheelToDispose
:
IDisposable
[];
private
_previousMouseWheelEventTime
:
number
=
0
;
private
_isDragging
:
boolean
;
private
_mouseIsOver
:
boolean
;
...
...
@@ -209,6 +214,7 @@ export abstract class AbstractScrollableElement extends Widget {
}
private
_onMouseWheel
(
e
:
StandardMouseWheelEvent
):
void
{
const
currentMouseWheelEventTime
=
Date
.
now
();
if
(
e
.
deltaY
||
e
.
deltaX
)
{
let
deltaY
=
e
.
deltaY
*
this
.
_options
.
mouseWheelScrollSensitivity
;
...
...
@@ -253,15 +259,31 @@ export abstract class AbstractScrollableElement extends Widget {
if
(
futureScrollPosition
.
scrollLeft
!==
desiredScrollPosition
.
scrollLeft
||
futureScrollPosition
.
scrollTop
!==
desiredScrollPosition
.
scrollTop
)
{
// TODO@smooth: [MUST] detect if the source of the `mousewheel` is intertial or not and use setScrollPositionSmooth
this
.
_scrollable
.
setScrollPositionNow
(
desiredScrollPosition
);
const
deltaT
=
currentMouseWheelEventTime
-
this
.
_previousMouseWheelEventTime
;
const
canPerformSmoothScroll
=
(
SCROLL_WHEEL_SMOOTH_SCROLL_ENABLED
&&
this
.
_options
.
mouseWheelSmoothScroll
// If either |∆x|, |∆y| or ∆t are too small then do not apply smooth scroll animation, because in that case the input source must be a touchpad or something similar.
&&
Math
.
max
(
Math
.
abs
(
deltaX
),
Math
.
abs
(
deltaY
))
*
SCROLL_WHEEL_SENSITIVITY
>
SCROLL_WHEEL_SMOOTH_SCROLL_PX_SPACE_TRESHOLD
&&
deltaT
>
SCROLL_WHEEL_SMOOTH_SCROLL_MS_TIME_TRESHOLD
);
if
(
canPerformSmoothScroll
)
{
this
.
_scrollable
.
setScrollPositionSmooth
(
desiredScrollPosition
);
}
else
{
this
.
_scrollable
.
setScrollPositionNow
(
desiredScrollPosition
);
}
this
.
_shouldRender
=
true
;
}
}
if
(
this
.
_options
.
alwaysConsumeMouseWheel
||
this
.
_shouldRender
)
{
e
.
preventDefault
();
e
.
stopPropagation
();
}
this
.
_previousMouseWheelEventTime
=
currentMouseWheelEventTime
;
}
private
_onDidScroll
(
e
:
ScrollEvent
):
void
{
...
...
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