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 ...