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LeadingMarginSpan

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.

Summary

Nested classes

interface LeadingMarginSpan.LeadingMarginSpan2

An extended version of LeadingMarginSpan, which allows the implementor to specify the number of lines of the paragraph to which this object is attached that the "first line of paragraph" margin width will be applied to. 

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.

Public methods

drawLeadingMargin

added in API level 1
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

getLeadingMargin

added in API level 1
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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