Datasets:
Ekhlass
/
flutter_constraints

Dataset card Data Studio Files Community
1
text
stringlengths
0
197
Instead, it aligns the container to the bottom-right of the
available space.
<topic_end>
<topic_start>
Example 5
<code_start>
Center(
child: Container(
width: double.infinity, height: double.infinity, color: red),
)
<code_end>
The screen forces the Center to be exactly the
same size as the screen, so the Center fills the screen.
The Center tells the Container that it can be any size it wants,
but not bigger than the screen. The Container wants to be
of infinite size, but since it can’t be bigger than the screen,
it just fills the screen.
<topic_end>
<topic_start>
Example 6
<code_start>
Center(
child: Container(color: red),
)
<code_end>
The screen forces the Center to be exactly the
same size as the screen, so the Center fills the screen.
The Center tells the Container that it can be any
size it wants, but not bigger than the screen.
Since the Container has no child and no fixed size,
it decides it wants to be as big as possible,
so it fills the whole screen.
But why does the Container decide that?
Simply because that’s a design decision by those who
created the Container widget. It could have been
created differently, and you have to read the
Container API documentation to understand
how it behaves, depending on the circumstances.
<topic_end>
<topic_start>
Example 7
<code_start>
Center(
child: Container(
color: red,
child: Container(color: green, width: 30, height: 30),
),
)
<code_end>
The screen forces the Center to be exactly the same
size as the screen, so the Center fills the screen.
The Center tells the red Container that it can be any size
it wants, but not bigger than the screen. Since the red
Container has no size but has a child,
it decides it wants to be the same size as its child.
The red Container tells its child that it can be any size
it wants, but not bigger than the screen.
The child is a green Container that wants to
be 30 × 30. Given that the red Container sizes itself to
the size of its child, it is also 30 × 30.
The red color isn’t visible because the green Container
entirely covers the red Container.
<topic_end>
<topic_start>
Example 8
<code_start>
Center(
child: Container(
padding: const EdgeInsets.all(20),
color: red,
child: Container(color: green, width: 30, height: 30),
),
)
<code_end>
The red Container sizes itself to its children’s size,
but it takes its own padding into consideration.
So it is also 30 × 30 plus padding.
The red color is visible because of the padding,
and the green Container has the same size as
in the previous example.
<topic_end>
<topic_start>
Example 9
<code_start>
ConstrainedBox(
constraints: const BoxConstraints(
minWidth: 70,
minHeight: 70,
maxWidth: 150,
maxHeight: 150,
),