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体验新版 GitCode,发现更多精彩内容 >>
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370dc130
编写于
7月 17, 2015
作者:
C
Collin Jackson
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差异文件
Draw debug rects when flex overflows
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1fcc5071
变更
1
隐藏空白更改
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并排
Showing
1 changed file
with
25 addition
and
8 deletion
+25
-8
sky/sdk/lib/rendering/flex.dart
sky/sdk/lib/rendering/flex.dart
+25
-8
未找到文件。
sky/sdk/lib/rendering/flex.dart
浏览文件 @
370dc130
...
...
@@ -81,7 +81,8 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
}
}
bool
_overflowOccurredDuringLayout
=
false
;
// Set during layout if overflow occurred on the main axis
double
_overflow
;
void
setupParentData
(
RenderBox
child
)
{
if
(
child
.
parentData
is
!
FlexBoxParentData
)
...
...
@@ -314,6 +315,8 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
}
child
=
child
.
parentData
.
nextSibling
;
}
_overflow
=
math
.
max
(
0.0
,
-
freeSpace
);
freeSpace
=
math
.
max
(
0.0
,
freeSpace
);
// Steps 4-5. Distribute remaining space to flexible children.
double
spacePerFlex
=
totalFlex
>
0
?
(
freeSpace
/
totalFlex
)
:
0.0
;
...
...
@@ -351,7 +354,7 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
child
=
child
.
parentData
.
nextSibling
;
}
// Section 8.2: Axis Alignment using the justify-content property
// Section 8.2:
Main
Axis Alignment using the justify-content property
double
remainingSpace
=
math
.
max
(
0.0
,
freeSpace
-
usedSpace
);
double
leadingSpace
;
double
betweenSpace
;
...
...
@@ -378,20 +381,16 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
break
;
}
Size
desiredSize
;
switch
(
_direction
)
{
case
FlexDirection
.
horizontal
:
desiredSize
=
new
Size
(
mainSize
,
crossSize
);
size
=
constraints
.
constrain
(
desiredSize
);
size
=
constraints
.
constrain
(
new
Size
(
mainSize
,
crossSize
));
crossSize
=
size
.
height
;
break
;
case
FlexDirection
.
vertical
:
desiredSize
=
new
Size
(
crossSize
,
mainSize
);
size
=
constraints
.
constrain
(
new
Size
(
crossSize
,
mainSize
));
crossSize
=
size
.
width
;
break
;
}
_overflowOccurredDuringLayout
=
desiredSize
!=
size
;
// Position elements
double
childMainPosition
=
leadingSpace
;
...
...
@@ -439,7 +438,25 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
}
void
paint
(
PaintingCanvas
canvas
,
Offset
offset
)
{
if
(
_overflowOccurredDuringLayout
)
{
if
(
_overflow
>
0
)
{
assert
(()
{
// Draw a red rectangle over the overflow area in debug mode
// You should be using a Clip if you want to clip your children
Paint
paint
=
new
Paint
()..
color
=
const
Color
(
0x7FFF0000
);
Rect
overflowRect
;
switch
(
direction
)
{
case
FlexDirection
.
horizontal
:
overflowRect
=
offset
+
new
Offset
(
size
.
width
,
0.0
)
&
new
Size
(
_overflow
,
size
.
height
);
break
;
case
FlexDirection
.
vertical
:
overflowRect
=
offset
+
new
Offset
(
0.0
,
size
.
height
)
&
new
Size
(
size
.
width
,
_overflow
);
break
;
}
canvas
.
drawRect
(
overflowRect
,
paint
);
return
true
;
});
canvas
.
save
();
canvas
.
clipRect
(
offset
&
size
);
defaultPaint
(
canvas
,
offset
);
...
...
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