List <Widget> _createTiles()
{
MaterialLocalizations localizations = MaterialLocalizations.of(this.context);
D.assert(localizations != null);
List <Widget> children = new List <Widget> {
};
switch (this.widget.type)
{
case BottomNavigationBarType.fix:
ThemeData themeData = Theme.of(this.context);
TextTheme textTheme = themeData.textTheme;
Color themeColor;
switch (themeData.brightness)
{
case Brightness.light:
themeColor = themeData.primaryColor;
break;
case Brightness.dark:
themeColor = themeData.accentColor;
break;
default:
throw new Exception("Unknown brightness: " + themeData.brightness);
}
ColorTween colorTween = new ColorTween(
begin: textTheme.caption.color,
end: this.widget.fixedColor ?? themeColor
);
for (int i = 0; i < this.widget.items.Count; i += 1)
{
int index = i;
children.Add(
new _BottomNavigationTile(this.widget.type, this.widget.items[i], this._animations[i],
this.widget.iconSize,
onTap: () => {
if (this.widget.onTap != null)
{
this.widget.onTap(index);
}
},
colorTween: colorTween,
selected: i == this.widget.currentIndex,
indexLabel: localizations.tabLabel(tabIndex: i + 1,
tabCount: this.widget.items.Count)
)
);
}
break;
case BottomNavigationBarType.shifting:
for (int i = 0; i < this.widget.items.Count; i += 1)
{
int index = i;
children.Add(
new _BottomNavigationTile(this.widget.type, this.widget.items[i], this._animations[i],
this.widget.iconSize,
onTap: () => {
if (this.widget.onTap != null)
{
this.widget.onTap(index);
}
},
flex:
this._evaluateFlex(this._animations[i]),
selected: i == this.widget.currentIndex,
indexLabel: localizations.tabLabel(tabIndex: i + 1,
tabCount: this.widget.items.Count)
)
);
}
break;
}
return(children);
}
List <Widget> _createTiles()
{
MaterialLocalizations localizations = MaterialLocalizations.of(this.context);
D.assert(localizations != null);
ThemeData themeData = Theme.of(this.context);
Color themeColor;
switch (themeData.brightness)
{
case Brightness.light:
themeColor = themeData.primaryColor;
break;
case Brightness.dark:
themeColor = themeData.accentColor;
break;
default:
throw new Exception("Unknown brightness: " + themeData.brightness);
}
ColorTween colorTween;
switch (this.widget.type)
{
case BottomNavigationBarType.fix:
colorTween = new ColorTween(
begin: this.widget.unselectedItemColor ?? themeData.textTheme.caption.color,
end: this.widget.selectedItemColor ?? this.widget.fixedColor ?? themeColor
);
break;
case BottomNavigationBarType.shifting:
colorTween = new ColorTween(
begin: this.widget.unselectedItemColor ?? Colors.white,
end: this.widget.selectedItemColor ?? Colors.white
);
break;
default:
throw new UIWidgetsError($"Unknown bottom navigation bar type: {this.widget.type}");
}
List <Widget> tiles = new List <Widget>();
for (int i = 0; i < this.widget.items.Count; i++)
{
int index = i;
tiles.Add(new _BottomNavigationTile(
this.widget.type,
this.widget.items[i],
this._animations[i],
this.widget.iconSize,
selectedFontSize: this.widget.selectedFontSize,
unselectedFontSize: this.widget.unselectedFontSize,
onTap: () => {
if (this.widget.onTap != null)
{
this.widget.onTap(index);
}
},
colorTween: colorTween,
flex: this._evaluateFlex(this._animations[i]),
selected: i == this.widget.currentIndex,
showSelectedLabels: this.widget.showSelectedLabels,
showUnselectedLabels: this.widget.showUnselectedLabels,
indexLabel: localizations.tabLabel(tabIndex: i + 1, tabCount: this.widget.items.Count)
));
}
return(tiles);
}
public override Widget build(BuildContext context)
{
ThemeData theme = Theme.of(context);
NavigationRailThemeData navigationRailTheme = NavigationRailTheme.of(context);
MaterialLocalizations localizations = MaterialLocalizations.of(context);
Color backgroundColor =
widget.backgroundColor ?? navigationRailTheme.backgroundColor ?? theme.colorScheme.surface;
float elevation = widget.elevation ?? navigationRailTheme.elevation ?? 0;
float minWidth = widget.minWidth ?? material_._minRailWidth;
float minExtendedWidth = widget.minExtendedWidth ?? material_._minExtendedRailWidth;
Color baseSelectedColor = theme.colorScheme.primary;
Color baseColor = theme.colorScheme.onSurface.withOpacity(0.64f);
IconThemeData defaultUnselectedIconTheme =
widget.unselectedIconTheme ?? navigationRailTheme.unselectedIconTheme;
IconThemeData unselectedIconTheme = new IconThemeData(
size: defaultUnselectedIconTheme?.size ?? 24.0f,
color: defaultUnselectedIconTheme?.color ?? theme.colorScheme.onSurface,
opacity: defaultUnselectedIconTheme?.opacity ?? 1.0f
);
IconThemeData defaultSelectedIconTheme = widget.selectedIconTheme ?? navigationRailTheme.selectedIconTheme;
IconThemeData selectedIconTheme = new IconThemeData(
size: defaultSelectedIconTheme?.size ?? 24.0f,
color: defaultSelectedIconTheme?.color ?? theme.colorScheme.primary,
opacity: defaultSelectedIconTheme?.opacity ?? 0.64f
);
TextStyle unselectedLabelTextStyle = theme.textTheme.bodyText1.copyWith(color: baseColor)
.merge(widget.unselectedLabelTextStyle ?? navigationRailTheme.unselectedLabelTextStyle);
TextStyle selectedLabelTextStyle = theme.textTheme.bodyText1.copyWith(color: baseSelectedColor)
.merge(widget.selectedLabelTextStyle ?? navigationRailTheme.selectedLabelTextStyle);
float groupAlignment = widget.groupAlignment ?? navigationRailTheme.groupAlignment ?? -1.0f;
NavigationRailLabelType labelType =
widget.labelType ?? navigationRailTheme.labelType ?? NavigationRailLabelType.none;
var materialChildren = new List <Widget>();
materialChildren.Add(material_._verticalSpacer);
if (widget.leading != null)
{
materialChildren.AddRange(new List <Widget>()
{
new ConstrainedBox(
constraints: new BoxConstraints(
minWidth: MathUtils.lerpNullableFloat(minWidth, minExtendedWidth, _extendedAnimation.value)
),
child: widget.leading
),
material_._verticalSpacer,
});
}
var alignChildren = new List <Widget>();
for (int i = 0; i < widget.destinations.Count; i += 1)
{
alignChildren.Add(new _RailDestination(
minWidth: minWidth,
minExtendedWidth: minExtendedWidth,
extendedTransitionAnimation: _extendedAnimation,
selected: widget.selectedIndex == i,
icon: widget.selectedIndex == i ? widget.destinations[i].selectedIcon : widget.destinations[i].icon,
label: widget.destinations[i].label,
destinationAnimation: _destinationAnimations[i],
labelType: labelType,
iconTheme: widget.selectedIndex == i ? selectedIconTheme : unselectedIconTheme,
labelTextStyle: widget.selectedIndex == i ? selectedLabelTextStyle : unselectedLabelTextStyle,
onTap: () => { widget.onDestinationSelected(i); },
indexLabel: localizations.tabLabel(
tabIndex: i + 1,
tabCount: widget.destinations.Count
)
));
}
if (widget.trailing != null)
{
alignChildren.Add(new ConstrainedBox(
constraints: new BoxConstraints(
minWidth: MathUtils.lerpNullableFloat(minWidth, minExtendedWidth, _extendedAnimation.value)
),
child: widget.trailing
));
}
materialChildren.Add(new Expanded(
child: new Align(
alignment: new Alignment(0, groupAlignment),
child: new Column(
mainAxisSize: MainAxisSize.min,
children: alignChildren
)
)
));
return(new _ExtendedNavigationRailAnimation(
animation: _extendedAnimation,
child: new Material(
elevation: elevation,
color: backgroundColor,
child: new Column(
children: materialChildren
)
)
));
}
