I need a grid that contains children of fixed sizes.
GridView expands its children, which is not what I need. The grid should simply size itself according to it's children by setting the crossAxisCount.
My current solution is to use simple columns and rows, but that's so much boilerplate code for just a common widget.
You will have to do it dynamically, and supply the value of the crossAxisCount dynamically
Related
look at the pic
I don't want elements to change their positions especially in horizontal axis when their strings changed
I mean it should be like a table with fixed columns.
can I do this just with row?
It's probably because you set a defined width for spacing.
You could use a combination of Flexible & Expanded widgets to wrap all the children in your Row.
That should align them correctly.
You can find the corresponding code here
In flutter, Is there any difference between these layouts? -
Expanded
SizedBox.expand
BoxConstraints.expand()
If all are same, why there are multiple layout classes/functions for same functionality?
As far as I know.
Expanded widget can only used inside of Row, Column and Flex. It helps to expand the children based on the flex value. By default - it's 1.
SizedBox.expand - It will expand the child as large as it's parent allows. You can put anywhere unlike Expanded.
BoxConstraints.expand - Usually takes as object of ConstrainedBox constraints property.
From the documentation -
Creates box constraints that expand to fill another box constraints.
If width or height is given, the constraints will require exactly the
given value in the given dimension.
What is the difference between gridview.builder and gridview.count in Flutter?
Like any other .builder GridView.builder create Widgets on demand.
Creates a scrollable, 2D array of widgets that are created on demand.
This constructor is appropriate for grid views with a large (or infinite) number of children because the builder is called only for those children that are actually visible.
But GridView.count allows to directly have crossAxisCount that use to count item on single row. Full Grandview will follow this pattern.
Creates a scrollable, 2D array of widgets with a fixed number of tiles in the cross axis.
When you have the large number of widgets, consider using GridView.builder to get better performance. Also, using gridDelegate gives you more controls over UI.
You can explore GridView.
In a flutter app, what is the difference between a Container inside a Row and a Row inside Container?
In flutter in each time I want to make an app, I took minutes to ask my self
which one should I choose?
In flutter Row and Column provide a way to use the Flex layout system aka FlexBox.
In short Flex is a one-dimensional layout system, where in the children can be aligned on the main-axis or cross-axis, the main axis can be defined as horizontal or vertical.
A Container in Flutter is a general-purpose widget that gives you access to a range of properties like padding, decoration, size etc. A full-list is available at the API Docs
To answer your question,
A Container in a Row is like we said above, a child of a Flex, which means it will respect the properties of alignment set by the parent (MainAxisAlignment/CrossAxisAlignment )
A Row in a Container, is the opposite of that which means that, the Row or Column will respect properties set on the Container that is for example the Decoration or Size properties amongst others.
I have a ListView with a Column, and inside that Column 2 buttons.
The ListView is stretched to the entire page (it contains more elements)
I want all the buttons inside the Column to stretch to the button with the largest width.
I found a solution on usnig InstrictWidth, but when used inside a Listview I'm getting the error
LayoutBuilder does not support returning intrinsic dimensions.
How can I still achieve what I'm looking for?
Wrap each button with an Expanded widget and then wrap each one of these Expanded widgets with a Row widget