Programming Tutorials

Flutter - ToggleButtons Vertical The ToggleButtons class represents a set of toggle buttons. The ToggleButton’s children are laid out along direction. The state of each button in a ToggleButton widget is controlled by the isSelected property, which is a list of bools that determine if a button is in an unselected or selected state. The flutter developers can configure the ToggleButtons widget’s each toggle behavior by the onPressed callback, which can update the isSelected list however it wants to. The ToggleButtons widget has a solid, 1 logical pixel border surrounding itself by default and separating each button. The following flutter app development tutorial will demonstrate how to display ToggleButtons vertically aligned. Here we used the ToggleButtons widget’s direction property to lay out buttons in the vertical direction. The ToggleButtons class’s direction property value is an Axis enum value which is the direction along which the buttons are rende...

Flutter - ToggleButtons onPressed The ToggleButtons class represents a set of toggle buttons. The ToggleButton’s children are laid out along direction. The state of each button in a ToggleButton widget is controlled by the isSelected property, which is a list of bools that determine if a button is in an unselected or selected state. The ToggleButton widget has a solid, 1 logical pixel border surrounding itself by default and separating each button. The flutter app developers can completely remove the ToggleButtons border by setting the renderBorder property value to false. The following flutter app development tutorial will demonstrate how to set the pressed callback for the ToggleButtons widget. Here we used the ToggleButtons widget’s onPressed property to set the pressed callback for the ToggleButtons widget’s buttons. The flutter developers can configure the ToggleButtons widget’s each toggle behavior by the onPressed callback, which can update the is...

Flutter - ToggleButtons Rounded Corners The ToggleButtons class represents a set of toggle buttons. The ToggleButton’s children are laid out along direction. The state of each button in a ToggleButton widget is controlled by the isSelected property, which is a list of bools that determine if a button is in an unselected or selected state. The flutter developers can configure the ToggleButtons widget’s each toggle behavior by the onPressed callback, which can update the isSelected list however it wants to. The ToggleButtons widget has a solid, 1 logical pixel border surrounding itself by default and separating each button. The following flutter app development tutorial will demonstrate how to create and show rounded corners ToggleButtons widget. Here we used the ToggleButtons widget’s borderRadius property to display the rounded corners ToggleButtons widget in a flutter app. In this flutter example code, we will also specify the ToggleButtos widget’s enab...

Flutter - ToggleButtons Color The ToggleButtons class represents a set of toggle buttons. The ToggleButton’s children are laid out along direction. The state of each button in a ToggleButton widget is controlled by the isSelected property, which is a list of bools that determine if a button is in an unselected or selected state. The flutter developers can configure the ToggleButtons widget’s each toggle behavior by the onPressed callback, which can update the isSelected list however it wants to. The ToggleButtons widget has a solid, 1 logical pixel border surrounding itself by default and separating each button. The following flutter app development tutorial will demonstrate how to set or change the ToggleButtons widget’s various colors such as text and icon color, selected toggle buttons fill color, splash color, selected toggle buttons text and icon color, enabled border color, disabled border color, and selected border color. The ToggleButtons class’s...

Flutter ToggleButtons The ToggleButtons class represents a set of toggle buttons. The ToggleButton’s children are laid out along direction. The state of each button in a ToggleButton widget is controlled by the isSelected property, which is a list of bools that determine if a button is in an unselected or selected state. They are both correlated by their index in the list. The length of isSelected has to match the length of the ToggleButton’s children list. The flutter developers can configure the ToggleButtons widget’s each toggle behavior by the onPressed callback, which can update the isSelected list however it wants to. The ToggleButtons widget has a solid, 1 logical pixel border surrounding itself by default and separating each button. But the flutter developers can configure the ToggleButton’s borders' color, width, and corner radii. The ToggleButtons class selectedBorderColor property value determines the border's color when the button ...

Flutter - DropdownButton Height The DropdownButton class represents a material design button for selecting from a list of items. The DropdownButton allows the user to select from a number of items. The DropdownButton shows the currently selected item as well as an arrow that opens a menu for selecting another item. The DropdownButton’s all entries in a menu must represent values with consistent types. Commonly, the flutter developers use an enum. The DropdownButton class’s onChanged callback should update a state variable that defines the dropdown's value. When the flutter developers set the onChanged callback to null or the list of items to null then the dropdown button will be disabled. The following flutter app development tutorial will demonstrate how to set or change the height of a DropdownButton widget. But there is no built-in property or method in DropdownButton class to set or change its height. There is a simple trick, flutter developers can ...

Flutter - DropdownButton Border The DropdownButton class represents a material design button for selecting from a list of items. The DropdownButton allows the user to select from a number of items. The DropdownButton shows the currently selected item as well as an arrow that opens a menu for selecting another item. The DropdownButton’s all entries in a menu must represent values with consistent types. Commonly, the flutter developers use an enum. The DropdownButton class’s onChanged callback should update a state variable that defines the dropdown's value. When the flutter developers set the onChanged callback to null or the list of items to null then the dropdown button will be disabled. The following flutter app development tutorial will demonstrate how to add a border to a DropdownButton widget. Here we will add a rounded corners border around the DropdownButton widget. But there is no built-in property or method in DropdownButton class to add a bord...

Flutter - DropdownButton Width The DropdownButton class represents a material design button for selecting from a list of items. The DropdownButton allows the user to select from a number of items. The DropdownButton shows the currently selected item as well as an arrow that opens a menu for selecting another item. The DropdownButton’s all entries in a menu must represent values with consistent types. Commonly, the flutter developers use an enum. The DropdownButton class’s onChanged callback should update a state variable that defines the dropdown's value. When the flutter developers set the onChanged callback to null or the list of items to null then the dropdown button will be disabled. The following flutter app development tutorial will demonstrate how to set or change the width of a DropdownButton widget. But there is no built-in property or method in DropdownButton class to set or change the width of the DropdownButton widget itself and its child it...

Flutter - DropdownButton Remove Underline The DropdownButton class represents a material design button for selecting from a list of items. The DropdownButton allows the user to select from a number of items. The DropdownButton shows the currently selected item as well as an arrow that opens a menu for selecting another item. The DropdownButton’s all entries in a menu must represent values with consistent types. Commonly, the flutter developers use an enum. The DropdownButton class’s onChanged callback should update a state variable that defines the dropdown's value. When the flutter developers set the onChanged callback to null or the list of items to null then the dropdown button will be disabled. The following flutter app development tutorial will demonstrate how to remove the underline from a DropdownButton widget. Here we will use the DropdownButton class’s underline property to hide/remove the underline of the DropdownButton widget. The Dropdown...

Flutter DropdownButton The DropdownButton class represents a material design button for selecting from a list of items. The dropdown button allows the user to select from a number of items. The DropdownButton shows the currently selected item as well as an arrow that opens a menu for selecting another item. The DropdownButton’s all entries in a menu must represent values with consistent types. Commonly, the flutter developers use an enum. Each DropdownMenuItem in items must be specialized with that same type of argument. The DropdownButton class’s onChanged callback should update a state variable that defines the dropdown's value. This callback should also call State.setState to rebuild the dropdown menu with the new value. When the flutter developers set the onChanged callback to null or the list of items to null then the dropdown button will be disabled. In a disabled DropdownButton its arrow will be displayed in grey and it will not respond to ...

Flutter - TextButton Background Color The TextButton class represents a material design text button. The flutter developers can use text buttons on toolbars, in dialogs, or in line with other content. Text buttons do not have visible borders. The flutter developers should avoid using text buttons where they would blend in with other content such as in the middle of lists. The TextButton style can be overridden with its style parameter. The following flutter application development tutorial will demonstrate how we can set a background color for the TextButton. We will change the TextButton widget’s default background color. Here we will use the TextButton class’s styleFrom() method to change the TextButton’s default background color. The TextButton class’s styleFrom() method is a static convenience method that constructs a text button ButtonStyle given simple values. By default, TextButton class styleFrom() method returns a ButtonStyle that doesn't ...

Flutter - OutlinedButton Icon The OutlinedButton class represents a material design outlined button that is essentially a TextButton with an outlined border. The outlined buttons are medium-emphasis buttons. In a flutter application, the OutlinedButtons contain actions that are important, but they are not the primary action in an app. An OutlinedButton widget’s default style is defined by defaultStyleOf. The flutter application developers can override the OutlinedButton’s style with its style parameter. An OutlinedButton has a default ButtonStyle.side which defines the appearance of the outline. The flutter app developers can specify an OutlinedButton's shape and the appearance of its outline by specifying both the ButtonStyle.shape and ButtonStyle.side properties. The following flutter application development tutorial will demonstrate how to create an OutlinedButton widget with an icon. Here we will use the OutlinedButton.icon() constructor to create a...

Flutter - OutlinedButton Border Radius The OutlinedButton class represents a material design outlined button that is essentially a TextButton with an outlined border. The outlined buttons are medium-emphasis buttons. In a flutter application, the OutlinedButtons contain actions that are important, but they are not the primary action in an app. An OutlinedButton widget’s default style is defined by defaultStyleOf. The flutter application developers can override the OutlinedButton’s style with its style parameter. An OutlinedButton has a default ButtonStyle.side which defines the appearance of the outline. The flutter app developers can specify an OutlinedButton's shape and the appearance of its outline by specifying both the ButtonStyle.shape and ButtonStyle.side properties. The following flutter application development tutorial will demonstrate how to set or change the OutlinedButton widget’s border-radius. That means how we can make rounded corners Out...

Flutter - OutlinedButton Border Color The OutlinedButton class represents a material design outlined button that is essentially a TextButton with an outlined border. The outlined buttons are medium-emphasis buttons. In a flutter application, the OutlinedButtons contain actions that are important, but they are not the primary action in an app. An OutlinedButton widget’s default style is defined by defaultStyleOf. The flutter application developers can override the OutlinedButton’s style with its style parameter. An OutlinedButton has a default ButtonStyle.side which defines the appearance of the outline. The flutter app developers can specify an OutlinedButton's shape and the appearance of its outline by specifying both the ButtonStyle.shape and ButtonStyle.side properties. The following flutter application development tutorial will demonstrate how to set or change the OutlinedButton widget’s border color. Here we will use the OutlinedButton class’s styl...

Flutter OutlinedButton The OutlinedButton class represents a material design Outlined Button that is essentially a TextButton with an outlined border. The Outlined buttons are medium-emphasis buttons. In a flutter application, the OutlinedButtons contain actions that are important, but they are not the primary action in an app. An OutlinedButton widget’s default style is defined by defaultStyleOf. The flutter application developers can override the OutlinedButton’s style with its style parameter. An OutlinedButton has a default ButtonStyle.side which defines the appearance of the outline. The flutter app developers can specify an OutlinedButton's shape and the appearance of its outline by specifying both the ButtonStyle.shape and ButtonStyle.side properties. The OutlinedButton() constructor creates an OutlinedButton. And the OutlinedButton.icon() constructor creates a text button from a pair of widgets that serve as the button's icon and labe...

Flutter TextField The TextField class represents a material design text field. The TextField widget lets the user enter text, either with a hardware keyboard or with an onscreen keyboard. The TextField calls the onChanged callback whenever the user changes the text in the field. The flutter developers can control the text that is displayed in the TextField using the controller. The controller allows developers to set an initial value. The controller can also control the selection and composing region and observe changes to the text, selection, and composing region. The flutter developers can use TextField decoration property to control the decoration, for example by adding a label or an icon. The flutter developers can read the value from a TextField widget to use the onSubmitted callback. The onSubmitted callback is applied to TextField's current value when the user finishes editing. The flutter app developers can always read t...

Flutter IconButton The IconButton class represents a material design icon button. IconButton is a picture printed on a material widget that reacts to touches by filling with color. The flutter developers commonly used the Icon buttons in the AppBar actions field, but IconButtons can be used in many other places as well. The flutter app developers can leave the onPressed callback null to disable an IconButton, then it will not react to touch. The IconButton class has several useful properties such as alignment, autofocus, color, disabledColor, focusColor, highlightColor, hoverColor, icon, iconSize, isSelected, onPressed, padding, selectedIcon, splashColor, style, and tooltip. The IconButton class’s alignment property defines how the icon is positioned within the IconButton. The color property defines the color to use for the icon inside the button if the icon is enabled. The icon property defines the icon to display inside the button. The ic...

Flutter ElevatedButton The ElevatedButton class represents a material design elevated button. The flutter developers can use elevated buttons to add dimension to otherwise mostly flat layouts such as in long busy lists of content, or in wide spaces. The flutter developers should avoid using elevated buttons on already-elevated content such as dialogs or cards. An ElevatedButton widget is a label child displayed on a Material widget whose Material.elevation increases when the button is pressed. The label's Text and Icon widgets are displayed in style's ButtonStyle.foregroundColor and the button's filled background is the ButtonStyle.backgroundColor. The ElevatedButton widget's default style is defined by defaultStyleOf. The style of this ElevatedButton can be overridden with its style parameter. The static styleFrom method is a convenient way to create an ElevatedButton ButtonStyle from simple values. If the ElevatedButto...