public static ChipThemeData fromDefaults(
Brightness?brightness = null,
Color primaryColor = null,
Color secondaryColor = null,
TextStyle labelStyle = null
)
{
D.assert(primaryColor != null || brightness != null,
"One of primaryColor or brightness must be specified");
D.assert(primaryColor == null || brightness == null,
"Only one of primaryColor or brightness may be specified");
D.assert(secondaryColor != null);
D.assert(labelStyle != null);
if (primaryColor != null)
{
brightness = ThemeData.estimateBrightnessForColor(primaryColor);
}
const int backgroundAlpha = 0x1f; // 12%
const int deleteIconAlpha = 0xde; // 87%
const int disabledAlpha = 0x0c; // 38% * 12% = 5%
const int selectAlpha = 0x3d; // 12% + 12% = 24%
const int textLabelAlpha = 0xde; // 87%
ShapeBorder shape = new StadiumBorder();
EdgeInsets labelPadding = EdgeInsets.symmetric(horizontal: 8.0f);
EdgeInsets padding = EdgeInsets.all(4.0f);
primaryColor = primaryColor ?? (brightness == Brightness.light ? Colors.black : Colors.white);
Color backgroundColor = primaryColor.withAlpha(backgroundAlpha);
Color deleteIconColor = primaryColor.withAlpha(deleteIconAlpha);
Color disabledColor = primaryColor.withAlpha(disabledAlpha);
Color selectedColor = primaryColor.withAlpha(selectAlpha);
Color secondarySelectedColor = secondaryColor.withAlpha(selectAlpha);
TextStyle secondaryLabelStyle = labelStyle.copyWith(
color: secondaryColor.withAlpha(textLabelAlpha)
);
labelStyle = labelStyle.copyWith(color: primaryColor.withAlpha(textLabelAlpha));
return(new ChipThemeData(
backgroundColor: backgroundColor,
deleteIconColor: deleteIconColor,
disabledColor: disabledColor,
selectedColor: selectedColor,
secondarySelectedColor: secondarySelectedColor,
labelPadding: labelPadding,
padding: padding,
shape: shape,
labelStyle: labelStyle,
secondaryLabelStyle: secondaryLabelStyle,
brightness: brightness
));
}
public Color getTextColor(MaterialButton button)
{
if (!button.enabled)
{
return(this.getDisabledTextColor(button));
}
if (button.textColor != null)
{
return(button.textColor);
}
switch (this.getTextTheme(button))
{
case ButtonTextTheme.normal:
return(this.getBrightness(button) == Brightness.dark ? Colors.white : Colors.black87);
case ButtonTextTheme.accent:
return(this.colorScheme.secondary);
case ButtonTextTheme.primary: {
Color fillColor = this.getFillColor(button);
bool fillIsDark = fillColor != null
? ThemeData.estimateBrightnessForColor(fillColor) == Brightness.dark
: this.getBrightness(button) == Brightness.dark;
if (fillIsDark)
{
return(Colors.white);
}
//todo:xingwei.zhu: uncomment these when OutlineButton are ready
if (button is FlatButton /* || button is OutlineButton*/)
{
return(this.colorScheme.primary);
}
return(Colors.black);
}
}
D.assert(false);
return(null);
}
public Color getTextColor(MaterialButton button)
{
if (!button.enabled)
{
return(getDisabledTextColor(button));
}
if (button.textColor != null)
{
return(button.textColor);
}
switch (getTextTheme(button))
{
case ButtonTextTheme.normal:
return(getBrightness(button) == Brightness.dark ? Colors.white : Colors.black87);
case ButtonTextTheme.accent:
return(colorScheme.secondary);
case ButtonTextTheme.primary: {
Color fillColor = getFillColor(button);
bool fillIsDark = fillColor != null
? ThemeData.estimateBrightnessForColor(fillColor) == Brightness.dark
: getBrightness(button) == Brightness.dark;
if (fillIsDark)
{
return(Colors.white);
}
if (button is FlatButton || button is OutlineButton)
{
return(colorScheme.primary);
}
return(Colors.black);
}
}
D.assert(false);
return(null);
}
static Brightness _brightnessFor(Color color)
{
return(ThemeData.estimateBrightnessForColor(color));
}