I need to remove the space between checkbox and title but i cant able to reduce the space
here is my code
Expanded(
//width: 30,
child: CheckboxListTile(
checkColor: Colors.white,
activeColor: PRIMARY_COLOR,
title: Text('Select All',
style: TextStyle(
fontSize: 12,
fontWeight: FontWeight.bold,
color: Colors.black)),
value: _selectAll,
dense: true,
contentPadding: EdgeInsets.fromLTRB(0, 0, 0, 0),
controlAffinity: ListTileControlAffinity.leading,
onChanged: (bool value) {
}
}
setState(() {});
}),
),
here is the image how it is coming
How to reduce the space
You need to create a custom widget in order to resolve your problem, because if you're using the CheckboxListTile the way it is, you're gonna have to add more contentPadding to your widget in order to make the gap smaller and by default, I see that it has a default padding between the actual checkbox and the text widget ... I personally, don't know why you're trying to squeeze more space from this thing, because in documentation it says clearly that CheckboxListTile acts just like a ListTile, which in my knowledge it takes all the space available in a row and the padding between items in your widget will be a little bit bigger. Also your widget is wrapped in an Expanded widget which also take the whole space available. So in conclusion you either use it as the way it is intended, or you can create a custom widget that will bennefit your problems.
Related
I'm building a Flutter Web App and am hacking the appbar for my navigation. I'm creating a dropdown menu to give some more options, only I want the arrow icons to be uniform and not change the spacing. This is an example of what I want:
And this is what I have:
It's subtle but also annoying me. This is the code I have for each dropdownbutton:
return DropdownButtonHideUnderline(
child: DropdownButton<String>(
isExpanded: false,
alignment: Alignment.center,
iconSize: 15,
value: dropdownValue,
icon: const Icon(Icons.arrow_downward),
// elevation: 16,
style: TextStyle(
color: Theme.of(context).colorScheme.primary,
fontFamily: GoogleFonts.lora().fontFamily,
),
onChanged: (String? value) {
// This is called when the user selects an item.
setState(() {
dropdownValue = value!;
});
},
I tried wrapping them in a sized box with equal height and width, but that also didn't work, this is the closest I've gotten them.
In a CheckboxListTile, when we check the tile, the check box and the title change their color. What I need to achieve is to split the behavior and keep my title widget with the default color.
In this example, I'm trying to replace the title color but the default behavior is still in place and change the title color the same way as the checked icon:
https://dartpad.dev/?id=7f55df6ce3ba094cfe1db680ccc4b400
The only way I found to achieve the goal is to set directly in the widget the color.
Text(
'Select Example',
style: TextStyle(color: Colors.red),
)
I know I can do a custom item do reach this objective but my question is if possible to override the title widget color when the tile is selected in the CheckboxListTile Flutter widget?
Thanks for reading!
Its also weird for me that there are no separate properties for checkbox and text theme, but this is how you can achieve it.
return CheckboxListTile(
title: DefaultTextStyle(
style: const TextStyle(color: Colors.white),
child: widget.child,
),
tileColor: Colors.black,
selectedTileColor: Colors.black,
selected: isSelected,
dense: true,
value: isSelected,
onChanged: (v) => setState(() => isSelected = !isSelected),
controlAffinity: ListTileControlAffinity.leading,
);
So I have two SwitchListTiles on my modal Page, and the problem is that the text doesn't fit into it. (it takes 3 lines, but should 1)
How can I make it to be in one single line, without decreasing it's font size
child: SwitchListTile(
value: state.filter.flagId == null ? false : true,
onChanged: (newValue) =>
context.read<FilterBloc>().add(HotPressed(newValue)),
title: Text(
AppLocalizations.of(context)!.hotAdds.capitalize(),
style: FlutterFlowTheme.dark50016.copyWith(),
),
tileColor: FlutterFlowTheme.white,
activeColor: FlutterFlowTheme.primaryColor,
dense: true,
controlAffinity: ListTileControlAffinity.trailing,
),
I was thinking that the possible answer could be to decrease the distance between tile, but don't know how to do it
Just add "maxLines: 1" to Text widget
title: Text(
AppLocalizations.of(context)!.hotAdds.capitalize(),
style: FlutterFlowTheme.dark50016.copyWith(),
maxLines: 1,
),
There is default padding on the outer edges and also between the text and the switch. From what I can see the outer padding (the padding to the right of the switch and to the left of the text) defaults to 16. You can change this by adding contentPadding as an input to SwitchListTile and set the value to something smaller than 16:
contentPadding: EdgeInsets.symmetric(horizontal: 5),
But I'm not sure if you can change the padding between the text and the switch.
wrap your text widget to Flexible and trim() your text to avoid enter(\n) as string. maxLines =1.
title: Flexible(
child: Text(
AppLocalizations.of(context)!.hotAdds.capitalize().trim(),
style: FlutterFlowTheme.dark50016.copyWith(),
maxLines: 1,
),
),
I have a Text widget and not sure why it seems to just have padding at the top and bottom even though I didn't set any in the code. This is from the default Flutter app, I just modified the font size.
body: Center(
child: Column(
children: <Widget>[
Text(
'0:00.00',
style: TextStyle(fontSize: 76),
),
],
),
),
This is a screenshot of the highlighted Text widget in Android Studio. There's really nothing else adding any padding so I don't know why it's there.
Sometimes you get this in CSS where there is padding even though none was set but you can remove it simply with padding: 0 but I don't see how to do it here since I can't find a padding option for the Text widget.
EDIT: The amount of padding changes with the size of the font. It seems to always contain a certain amount of padding, like a html H1 tag.
The proper way you can get rid of the unwanted padding is by setting the height property in the TextStyle. With this you set the height for each line.
Text(
"Let's make\nsome pancakes",
style: TextStyle(
height: 1.2, //SETTING THIS CAN SOLVE YOUR PROBLEM
color: Colors.white,
fontSize: 20,
fontWeight: FontWeight.w300,
),
textAlign: TextAlign.center,
),
In fact, we can confirm from the docs that:
For most fonts, setting height to 1.0 is not the same as omitting or setting height to null because the fontSize sets the height of the EM-square, which is different than the font provided metrics for line height.
For more info: https://api.flutter.dev/flutter/painting/TextStyle/height.html
So give it a try. It worked for me.
There are reasons why the Text widget has this "padding". Take in consideration the next example:
Text(
'123 gyÓ',
style: TextStyle(
fontSize: 40.0,
),
),
As we can see, using another characters like the letters g and y and an uppercase O with an accent marker, shows us that there's no padding on the Text widget really.
Fonts have ascenders and descenders on some characters, and there's also en ascent line for special characters like the accent marker. That's why numbers are centered in the middle. That's not padding on Flutter side, but typography design(?). Maybe you could find a way to sort your issue, by looking for a font without ascenders and descenders.
More info about fonts on Wikipedia
Conclusion: if you want to select the Text widget with the Flutter inspector, and see no space around some characters, that is not possible.
I think I found a good solution/workaround for removing both top and bottom padding.
The trick is to put your Text in a Container and then change the height of your TextStyle inside the Text, as well as the height of your Container. It's a bit of going back and forth for the perfect measurements but it's worth it imo.
Here's an example from my own code.
Container(
height: 24,
child: Text(
'Auto',
style: TextStyle(
height: 0.77,
fontSize: 32,
fontWeight: FontWeight.bold,
color: Colors.white,
),
textAlign: TextAlign.center,
),
There are 2 potential reasons:
The fontFamily - try commenting it out and see if you still have the same problem. If this is the reason and you absolutely must/want to use this specific font, I'm not sure what the fix is, apart from some horrible logic to stack widgets accordingly so that it looks like there's no padding.
Layout constraints from the parent Widgets - you only included the code of the Text widget, but if for example it's wrapped in an Expanded widget within a Column, that would also explain the extra height (possibly wrong assumption here because the text wouldn't center itself vertically by default anyway, but then there might be a DefaultTextStyle widget up in the hierarchy somewhere so still possible....)
Edit: It seems like there is some default padding around the text.
I found that you can reduce the top padding by setting a TextStyle with a height lower than 1. The value required seems to depend on the font size and the text itself, as different characters have different heights.
You can also reduce the bottom padding by clipping the Text using a fixed size Container. This will also vary based on the font size and the text itself. Below is an example of using both of these to reduce the top and bottom padding to 0 for the text '0:00.00' of font size 72:
ClipRect(
child: Container(
height: 55,
child: Text("0:00.00",
style: TextStyle(
fontSize: 72,
height: 0.80,
),
),
),
),
I know this is a very poor solution, but I don't know of any better one. I tried using a custom StrutStyle on the Text widget, but that didn't help either.
Try playing with line height of the text by setting height in style property. Height of the text is determined based on font size. It will multiply the font size and give you the space that will look like it has some padding. The line height of the text is also linked to the font itself, since every font has it own line height.
child: Text(
'Some text goes here',
style: TextStyle(
fontSize: 25.0,
height: 1,
),
)
I found the solution myself in the end. It can be positioned using Stack and Row widgets. I found Row works better than using Positioned as the text can be centred using the Row widgets.
body: Stack(
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'0:00.00',
style: TextStyle(fontSize: 76),
),
],
),
Padding(
padding: EdgeInsets.only(top: 56.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'Coke',
style: TextStyle(fontSize: 76),
),
],
),
),
],
)
It kind of works like the negative padding in CSS but actually it's the padding that moves the bottom text down rather than up since otherwise they occupy the same space.
After googling a while, I've written this.
What does it do? It's shifting down the position of the text
(not shrinking)
import 'package:vector_math/vector_math_64.dart';
import 'package:flutter/material.dart';
class BaselineText extends StatefulWidget {
final Widget child;
BaselineText({this.child});
#override
_BaselineTextState createState() => _BaselineTextState();
}
class _BaselineTextState extends State<BaselineText> {
GlobalKey _key = GlobalKey();
void initState() {
super.initState();
WidgetsBinding.instance.addPostFrameCallback((_) => setState(() {}));
}
#override
Widget build(BuildContext context) {
final RenderBox renderBox = _key.currentContext?.findRenderObject();
final height = renderBox?.size?.height ?? 0;
return Baseline(
baseline: 0,
baselineType: TextBaseline.ideographic,
key: _key,
child: Transform(
transform: Matrix4.translation(
Vector3(0, height, 0),
),
child: widget.child,
),
);
}
}
How to use:
BaselineText(
child: Text("something"),
)
DONE!!!
Is there any way to apply custom theme for ExpansionTile. In my case, I want to have the different background colour for Header and children of the expansion tile but When ever the ExpansionTile is expanded, Headers background color changes to that of children?
To apply a custom Theme to any widget, just wrap it with the Theme() widget.
and then specify your custom theme in the data field of the widget.
Theme(
data: ThemeData(/*specify your custom theme here*/),
child: ExpansionTile() /*or any other widget you want to apply the theme to.*/
)
In your case, to customise the header in ExpansionTile,
when ExpansionTile is closed
the style of header text i.e. title depends on
ThemeData.textTheme.subhead (in flutter 2 it's ThemeData.textTheme.subtitle1)
whereas, the style of the arrow icon depends
on ThemeData.unselectedWidget (in flutter 2 it's ThemeData.unselectedWidgetColor)
when ExpansionTile is open
the color of both the widgets depends on ThemeData.accentColor
In a similar fashion you can customise almost any part of the expansion tile by tweaking the theme. For more details check out this link.
Since flutter is built with flexibility in mind. You can do almost anything you want. Create almost any UI you want.
Following the idea of #user3315892, you can implement your own stateful widget for the ExpansionTile, so that you can control what colours you want the header and children to be when the header is expanded or collapsed.
The following example only changes the text foreground and background colours of the header when the expansion tile is expanded or collapsed, but you can do the same for the children widgets.
class CustomExpansionTile extends StatefulWidget {
#override
State createState() => CustomExpansionTileState();
}
class CustomExpansionTileState extends State<CustomExpansionTile> {
bool isExpanded = false;
#override
Widget build(BuildContext context) {
return ExpansionTile(
title: Container(
child: Text(
"HEADER HERE",
style: TextStyle(
color: isExpanded ? Colors.pink : Colors.teal,
),
),
// Change header (which is a Container widget in this case) background colour here.
color: isExpanded ? Colors.orange : Colors.green,
),
leading: Icon(
Icons.face,
size: 36.0,
),
children: <Widget>[
Text("Child Widget One"),
Text("Child Widget Two"),
],
onExpansionChanged: (bool expanding) => setState(() => this.isExpanded = expanding),
);
}
}
I found another way to do it. I don't know if this is the best way but it's simpler for me.
To change the ExpansionTile color, you can wrap it with a Container and give it a color. This will change the entire color of the ExpansionTile, both collapsed and expanded.
But if you want a different color for the children, you can also wrap them with a Container and set another color there. However, keep in mind that you have to "expand" that Container to occupy all the available space (you can do it by setting width and height parameters properly).
Btw, that doesn't change the arrow color.
Widget expansionTileTest(context) {
return Container(
color: Colors.grey,
child: ExpansionTile(
title: Text(
"Title",
style: TextStyle(color: Colors.black),
),
children: <Widget>[
Container(
height: MediaQuery.of(context).size.height * 0.1,
width: MediaQuery.of(context).size.width,
color: Colors.yellow,
child: Center(child: Text("Hi")),
),
],
),
);
}
Collapsed
Expanded
You can set color of header and then body/children wrap in Container and set color to that container.
I used this code to make the trailing ion color Black.
Theme(
data: Theme.of(context).copyWith(accentColor: Colors.black),
child: ExpansionTile(
backgroundColor: Colors.white,
title: Text(
'Title Exmample',
style: TextStyle(color: Colors.black),
),
leading: CircleAvatar(
backgroundColor: Colors.black.withOpacity(.07),
child: Icon(
Icons.apps_outlined,
color: Theme.of(context).primaryColor,
)),
children: _buildTiles(Theme.of(context).primaryColor, Colors.black.withOpacity(.07), context),
),
);
If you want the ExpansionTile title to remain the same color whether closed or expanded, you can set it's style:
ExpansionTile(
title: Text('HEADER HERE', style: TextStyle(color: Colors.red)),
...
),
Additional styling for ExpansionTile is an open feature request:
Feature request: More styling of ExpansionTile #15427