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Simpler hit-testing APIs based on Core Text's. Microsoft's PadWrite sample shows us how to implement these on both DirectWrite and the similarly-interfaced Pango.

This commit is contained in:
Pietro Gagliardi 2017-02-08 11:38:52 -05:00
parent 012ce92b71
commit 93537ebb83
1 changed files with 6 additions and 2 deletions
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8
ui_attrstr.h
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@ -180,8 +180,12 @@ _UI_EXTERN void uiDrawTextLayoutExtents(uiDrawTextLayout *tl, double *width, dou
_UI_EXTERN int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl);
_UI_EXTERN void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end);
_UI_EXTERN void uiDrawTextLayoutLineGetMetrics(uiDrawTextLayout *tl, int line, uiDrawTextLayoutLineMetrics *m);
_UI_EXTERN void uiDrawTextLayoutHitTest(uiDrawTextLayout *tl, double x, double y, uiDrawTextLayoutHitTestResult *result);
_UI_EXTERN void uiDrawTextLayoutByteRangeToRectangle(uiDrawTextLayout *tl, size_t start, size_t end, uiDrawTextLayoutByteRangeRectangle *r);
//TODO _UI_EXTERN void uiDrawTextLayoutHitTest(uiDrawTextLayout *tl, double x, double y, uiDrawTextLayoutHitTestResult *result);
//TODO _UI_EXTERN void uiDrawTextLayoutByteRangeToRectangle(uiDrawTextLayout *tl, size_t start, size_t end, uiDrawTextLayoutByteRangeRectangle *r);
// TODO draw only a line?
// TODO other layout-specific attributes (alignment, wrapping, etc.)?
// TODO number of lines visible for clipping rect, range visible for clipping rect?
_UI_EXTERN void uiDrawTextLayoutHitTest(uiDrawTextLayout *tl, double x, double y, size_t *pos, int *line);
// TODO line first?
_UI_EXTERN void uiDrawTextLayoutByteLocation(uiDrawTextLayout *tl, size_t pos, double *x, int *line);