public
interface
LeadingMarginSpan
implements
ParagraphStyle
| android.text.style.LeadingMarginSpan |
 Known Indirect Subclasses
|
A paragraph style affecting the leading margin. There can be multiple leading margin spans on a single paragraph; they will be rendered in order, each adding its margin to the ones before it. The leading margin is on the right for lines in a right-to-left paragraph.
LeadingMarginSpans should be attached from the first character to the last character of a single paragraph.
Nested classes | |
|---|---|
interface |
LeadingMarginSpan.LeadingMarginSpan2
An extended version of |
class |
LeadingMarginSpan.Standard
The standard implementation of LeadingMarginSpan, which adjusts the margin but does not do any rendering. |
Public methods | |
|---|---|
abstract
void
|
drawLeadingMargin(Canvas c, Paint p, int x, int dir, int top, int baseline, int bottom, CharSequence text, int start, int end, boolean first, Layout layout)
Renders the leading margin. |
abstract
int
|
getLeadingMargin(boolean first)
Returns the amount by which to adjust the leading margin. |
void drawLeadingMargin (Canvas c, Paint p, int x, int dir, int top, int baseline, int bottom, CharSequence text, int start, int end, boolean first, Layout layout)
Renders the leading margin. This is called before the margin has been
adjusted by the value returned by getLeadingMargin(boolean).
| Parameters | |
|---|---|
c |
Canvas:
the canvas |
p |
Paint:
the paint. The this should be left unchanged on exit. |
x |
int:
the current position of the margin |
dir |
int:
the base direction of the paragraph; if negative, the margin
is to the right of the text, otherwise it is to the left. |
top |
int:
the top of the line |
baseline |
int:
the baseline of the line |
bottom |
int:
the bottom of the line |
text |
CharSequence:
the text |
start |
int:
the start of the line |
end |
int:
the end of the line |
first |
boolean:
true if this is the first line of its paragraph |
layout |
Layout:
the layout containing this line
|
int getLeadingMargin (boolean first)
Returns the amount by which to adjust the leading margin. Positive values move away from the leading edge of the paragraph, negative values move towards it.
| Parameters | |
|---|---|
first |
boolean:
true if the request is for the first line of a paragraph,
false for subsequent lines |
| Returns | |
|---|---|
int |
the offset for the margin. |
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