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Published 3 years ago • verified publishercaduandrade.net• Latest: 1.19.1
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Flutter widget inspired by the classic Desktop-style tab component. Supports customizable themes.

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pub pub2

Tabbed view #

Flutter widget inspired by the classic Desktop-style tab component. Supports customizable themes.

classiccut darkcut mobilecut minimalistcut fromthescratchcut

Get started #

The TabbedViewTheme.classic() method builds the default theme.

    List<TabData> tabs = [];
    for (var i = 1; i < 7; i++) {
      Widget tabContent = Center(child: Text('Content $i'));
      tabs.add(TabData(text: 'Tab $i', content: tabContent));
    }
    TabbedView tabbedView = TabbedView(controller: TabbedViewController(tabs));

classic

Content builder #

It allows creating the contents of the tab dynamically during the selection event.

    var tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2'),
      TabData(text: 'Tab 3')
    ];

    TabbedView tabbedView = TabbedView(
        controller: TabbedViewController(tabs),
        contentBuilder: (BuildContext context, int tabIndex) {
          int i = tabIndex + 1;
          return Center(child: Text('Content $i'));
        });

Close button tooltip #

    var tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2'),
      TabData(text: 'Tab 3')
    ];
    TabbedView tabbedView = TabbedView(
        controller: TabbedViewController(tabs),
        closeButtonTooltip: 'Click here to close the tab');

Tab #

Adding buttons #

    TabData tab = TabData(text: 'Tab', buttons: [
      TabButton(icon: Icons.star, onPressed: () => print('Hello!'))
    ]);
    TabbedView tabbedView = TabbedView(controller: TabbedViewController([tab]));

tabbutton

Overriding theme color

    var tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2', buttons: [
        TabButton(
            icon: Icons.star,
            color: Colors.green,
            onPressed: () => print('Hello!'))
      ])
    ];
    TabbedView tabbedView = TabbedView(controller: TabbedViewController(tabs));

tabbuttoncolor

Removing the close button #

    var tabs = [
      TabData(text: 'Tab'),
      TabData(text: 'Non-closable tab', closable: false)
    ];
    TabbedView tabbedView = TabbedView(controller: TabbedViewController(tabs));

nonclosabletab

Close listener #

    bool _onTabClosing(int tabIndex) {
      if (tabIndex == 0) {
        print('The tab $tabIndex is busy and cannot be closed.');
        return false;
      }
      print('Closing tab $tabIndex...');
      return true;
    }

    List<TabData> tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2'),
      TabData(text: 'Tab 3')
    ];
    TabbedView tabbedView = TabbedView(
        controller: TabbedViewController(tabs), onTabClosing: _onTabClosing);

Selection listener #

    _onTabSelection(int? newTabIndex) {
      print('The new selected tab is $newTabIndex.');
    }

    List<TabData> tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2'),
      TabData(text: 'Tab 3')
    ];
    TabbedView tabbedView = TabbedView(
        controller: TabbedViewController(tabs),
        onTabSelection: _onTabSelection);

Draggable tab builder #

    List<TabData> tabs = [];
    for (var i = 1; i < 7; i++) {
      Widget tabContent = Center(child: Text('Content $i'));
      tabs.add(TabData(text: 'Tab $i', content: tabContent));
    }
    TabbedView tabbedView = TabbedView(
        controller: TabbedViewController(tabs),
        draggableTabBuilder: (int tabIndex, TabData tab, Widget tabWidget) {
          return Draggable<String>(
              child: tabWidget,
              feedback: Material(
                  child: Container(
                      child: Text(tab.text),
                      padding: EdgeInsets.all(4),
                      decoration: BoxDecoration(border: Border.all()))),
              data: tab.text,
              dragAnchorStrategy: (Draggable<Object> draggable,
                  BuildContext context, Offset position) {
                return Offset.zero;
              });
        });

Keep alive #

The keepAlive parameter indicates whether to keep the tab content widget in memory even if it is not visible. Indicated to prevent loss of state due to tree change by tab selection. If enabled, the Widget will continue to be instantiated in the tree but will remain invisible. The default value is FALSE.

A more efficient alternative is to keep the data in TabData's value parameter as long as the TabbedViewController is being kept in the state of its class.

Tabs area #

Tabs area buttons #

    TabbedViewController controller = TabbedViewController([]);

    TabbedView tabbedView = TabbedView(
        controller: controller,
        tabsAreaButtonsBuilder: (context, tabsCount) {
          List<TabButton> buttons = [];
          buttons.add(TabButton(
              icon: Icons.add,
              onPressed: () {
                int millisecond = DateTime.now().millisecondsSinceEpoch;
                controller.addTab(TabData(text: '$millisecond'));
              }));
          if (tabsCount > 0) {
            buttons.add(TabButton(
                icon: Icons.delete,
                onPressed: () {
                  if (controller.selectedIndex != null) {
                    controller.removeTab(controller.selectedIndex!);
                  }
                }));
          }
          return buttons;
        });

tabsareabuttons

Themes #

Themes - Tab #

Text style

    var tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2'),
    ];

    TabbedViewTheme theme = TabbedViewTheme.classic();
    theme.tabsArea.tab.textStyle = TextStyle(fontSize: 20, color: Colors.blue);

    TabbedView tabbedView =
        TabbedView(controller: TabbedViewController(tabs), theme: theme);

tabtextstyle

Alignment

    var tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2'),
    ];

    TabbedViewTheme theme = TabbedViewTheme.classic();
    theme.tabsArea.tab
      ..textStyle = TextStyle(fontSize: 20)
      ..verticalAlignment = VerticalAlignment.top;

    TabbedView tabbedView =
        TabbedView(controller: TabbedViewController(tabs), theme: theme);

topalignment

Themes - Tabs area #

Color

  • The default TabsAreaTheme color is null.
    var tabs = [TabData(text: 'Tab 1'), TabData(text: 'Tab 2')];

    TabbedViewTheme theme = TabbedViewTheme.minimalist();
    theme.tabsArea.color = Colors.green[100];

    TabbedView tabbedView =
        TabbedView(controller: TabbedViewController(tabs), theme: theme);

tabsareacolor

Tab gaps

  • Gap before the tabs (allows negative value).
  • Gap between tabs (allows negative value).
  • Minimum gap after tabs. Separates the last tab and the buttons area.
    List<TabData> tabs = [];
    for (var i = 1; i < 7; i++) {
      tabs.add(
          TabData(text: 'Tab $i', content: Center(child: Text('Content $i'))));
    }

    TabbedViewTheme theme = TabbedViewTheme.classic();
    theme.tabsArea
      ..initialGap = 20
      ..middleGap = 5
      ..minimalFinalGap = 5;

    TabbedView tabbedView =
        TabbedView(controller: TabbedViewController(tabs), theme: theme);

customgap

Buttons area

Button icon for the hidden tabs menu
    List<TabData> tabs = [];
    for (var i = 1; i < 7; i++) {
      tabs.add(TabData(text: 'Tab $i'));
    }

    TabbedViewTheme theme = TabbedViewTheme.classic();
    theme.tabsArea.buttonsArea.hiddenTabsMenuButtonIcon =
        Icons.arrow_drop_down_circle_outlined;

    TabbedView tabbedView =
        TabbedView(controller: TabbedViewController(tabs), theme: theme);

hiddentabsbuttonicon

Themes - Menu #

Max width

    List<TabData> tabs = [];
    for (int i = 1; i < 11; i++) {
      tabs.add(TabData(text: 'Tab $i'));
    }

    TabbedViewTheme theme = TabbedViewTheme.classic()..menu.maxWidth = 100;

    TabbedView tabbedView =
        TabbedView(controller: TabbedViewController(tabs), theme: theme);

menumaxwidth

Ellipsis on overflow text

    var tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2'),
      TabData(text: 'Tab 3'),
      TabData(
          text: 'The name of the tab is so long that it doesn'
              't fit on the menu')
    ];

    TabbedViewTheme theme = TabbedViewTheme.classic()
      ..menu.ellipsisOverflowText = true;

    TabbedView tabbedView =
        TabbedView(controller: TabbedViewController(tabs), theme: theme);

menuellipsis

Predefined themes #

Classic theme

    List<TabData> tabs = [];
    for (var i = 1; i < 7; i++) {
      tabs.add(TabData(text: 'Tab $i', content:  Center(child: Text('Content $i'))));
    }
    TabbedViewController controller = TabbedViewController(tabs);

    TabbedView tabbedView = TabbedView(
        controller: controller,
        theme: TabbedViewTheme.classic());

classic2

Classic theme - Color set
    List<TabData> tabs = [];
    for (var i = 1; i < 7; i++) {
      tabs.add(TabData(text: 'Tab $i', content:  Center(child: Text('Content $i'))));
    }
    TabbedViewController controller = TabbedViewController(tabs);

    TabbedViewTheme theme = TabbedViewTheme.classic(colorSet: Colors.green);

    TabbedView tabbedView = TabbedView(
        controller: controller,
        theme: theme);

classiccolorset

Dark theme

    List<TabData> tabs = [];
    for (var i = 1; i < 7; i++) {
      tabs.add(TabData(text: 'Tab $i'));
    }
    TabbedViewController controller = TabbedViewController(tabs);

    var contentBuilder = (BuildContext context, int index) {
      int i = index + 1;
      Text text = Text('Content $i', style: TextStyle(color: Colors.white));
      return Center(child: text);
    };

    TabbedView tabbedView = TabbedView(
        controller: controller,
        contentBuilder: contentBuilder,
        theme: TabbedViewTheme.dark());

    Container container = Container(child: tabbedView, color: Colors.black);

dark

Dark theme - Color set
    List<TabData> tabs = [];
    for (var i = 1; i < 7; i++) {
      tabs.add(TabData(text: 'Tab $i'));
    }
    TabbedViewController controller = TabbedViewController(tabs);

    var contentBuilder = (BuildContext context, int index) {
      int i = index + 1;
      Text text = Text('Content $i', style: TextStyle(color: Colors.white));
      return Center(child: text);
    };

    TabbedViewTheme theme = TabbedViewTheme.dark(colorSet: Colors.indigo);

    TabbedView tabbedView = TabbedView(
        controller: controller, contentBuilder: contentBuilder, theme: theme);

    Container container = Container(child: tabbedView, color: Colors.black12);

darkcolorset

Mobile theme

    TabbedView tabbedView =
        TabbedView(controller: controller, theme: TabbedViewTheme.mobile());

mobile

Mobile theme - Color set
    TabbedViewTheme theme = TabbedViewTheme.mobile(colorSet: Colors.blueGrey);
    TabbedView tabbedView = TabbedView(controller: controller, theme: theme);

mobilecolorset

Mobile theme - Highlighted tab color
    TabbedViewTheme theme =
        TabbedViewTheme.mobile(highlightedTabColor: Colors.green[700]!);
    TabbedView tabbedView = TabbedView(controller: controller, theme: theme);

mobilehighlightedcolor

Minimalist theme

    TabbedView tabbedView =
        TabbedView(controller: controller, theme: TabbedViewTheme.minimalist());

minimalist

Minimalist theme - Color set
    TabbedView tabbedView = TabbedView(
        controller: controller,
        theme: TabbedViewTheme.minimalist(colorSet: Colors.blue));

minimalistchangecolor

Creating new theme #

It is possible to create an entire theme from scratch.

    var tabs = [
      TabData(text: 'Tab 1'),
      TabData(text: 'Tab 2'),
      TabData(text: 'Tab 3')
    ];

    TabbedViewTheme theme = TabbedViewTheme();
    theme.tabsArea
      ..border = Border(bottom: BorderSide(color: Colors.green[700]!, width: 3))
      ..middleGap = 6;

    Radius radius = Radius.circular(10.0);
    BorderRadiusGeometry? borderRadius =
        BorderRadius.only(topLeft: radius, topRight: radius);

    theme.tabsArea.tab
      ..padding = EdgeInsets.fromLTRB(10, 4, 10, 4)
      ..buttonsOffset = 8
      ..decoration = BoxDecoration(
          shape: BoxShape.rectangle,
          color: Colors.green[100],
          borderRadius: borderRadius)
      ..selectedStatus.decoration =
          BoxDecoration(color: Colors.green[200], borderRadius: borderRadius)
      ..highlightedStatus.decoration =
          BoxDecoration(color: Colors.green[50], borderRadius: borderRadius);

    TabbedView tabbedView =
        TabbedView(controller: TabbedViewController(tabs), theme: theme);

fromthescratchcut

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Publisher

verified publishercaduandrade.net

Metadata

Flutter widget inspired by the classic Desktop-style tab component. Supports customizable themes.

Repository (GitHub)
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License

unknown (license)

Dependencies

flutter

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