Programming Tutorials

Flutter - Set Text word spacing The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can set or change the Text word spacing. In this example code, we will increase the text word spacing instead of the default text word spacing. That means we will increase the gap between the Text widget’s text’s each word. In this flutter application, we will assign a TextStyle instance for the Text widget’s style property. Then we will use the...

Flutter - Text Background Color The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can set a background color for the Text. We will change the Text widget’s text default background color. Here we will assign a TextStyle object for the Text class style property value. In the below flutter example code, we will use the TextStyle class backgroundColor property to set a background color for a Text widget’s text instead its default...

Flutter - Set Text letter spacing The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can set or change the Text letter spacing. In this example code, we will increase the text letter spacing instead of the default text letter spacing. That means we will increase the space between the Text widget’s text’s each letter. Here we will assign a TextStyle instance for the Text widget’s style property. Then we will use the TextStyle c...

Flutter - Text Outline The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can draw an outline on a Text widget’s text. That means we will draw a stroke on a text. The outlined text shows a borderline at the edge of the text instance. Here we will assign a TextStyle object for the Text class style property value. In the below flutter example code, we will use the TextStyle class foreground property to draw an outline at the edg...

Flutter - Text Overline The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can overline the Text widget’s text. In this example code, we will use the TextStyle class decoration property to decorate the Text by putting an overline. The TextStyle class represents an immutable style describing how to format and paint text. The TextStyle class decoration property is used to apply decorations to paint near the text such as an overl...

Flutter - Set Text line height The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can set or change the Text line height. In this example code, we will increase the Text line height instead of the default text line height. Here we will assign a TextStyle instance for the Text widget’s style property. Then we will use the TextStyle class’s height property to set the line height for the Text widget's text. The Text class’s ...

Flutter - Text Line Through The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can draw a line through the Text widget’s text. That means we will draw a line through each line of text. The developers also call it strikethrough text. Here we will assign a TextStyle instance for the Text widget’s style property. In the below flutter example code, we will use the TextStyle class decoration property to decorate the Text widget’s t...

Flutter - Add shadow to the Text The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can add shadow to the Text. We will draw a shadow for the text. Here we will assign a TextStyle instance for the Text widget’s style property. Then we will use the TextStyle class’s shadows property to add a shadow to the Text. We will also set the shadow color, offset and blur using the Shadow class’s various properties. The Text class’s styl...

Flutter - Space between Text and underline The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted, the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can underline text. And we will also show how we can put some extra space between the Text and the underline. How to increase the gap between the text and its underline. Here we will assign a TextStyle instance for the Text widget’s style property. Then we will use the TextStyle class’s decoration property to put an underline undernea...

Flutter - Text Underline Thickness The Text widget displays a string of text with a single style in a flutter app. But depending on the layout constraints the string might break across multiple lines or might all be displayed on the same line. The style argument is optional in a Text instance. When the style argument is omitted then the text will use the style from the closest enclosing DefaultTextStyle. By default, the Text is not selectable. But flutter developers can make a Text selectable by wrapping a subtree with a SelectionArea widget. The following flutter application development tutorial will demonstrate how we can underline text and make the underline bolder instead default height/thickness. That means we will change the text underline’s line height/thickness to make it thinner or thicker than the default value. Here we will assign a TextStyle instance for the Text widget’s style property. Then we will use the TextStyle class’s decoration prope...

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 ...