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Added the first text layout attribute: foreground color. Now to implement.

This commit is contained in:
Pietro Gagliardi 2016-04-19 15:38:24 -04:00
parent 6fdbd8d68f
commit 7a568f6bf4
2 changed files with 17 additions and 93 deletions
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107
test/page10.c
View File

@ -22,112 +22,33 @@ static double entryDouble(uiEntry *e)
return d;
}
// TODO this should be altered not to restore all state on exit so default text attributes can be checked
static void drawGuides(uiDrawContext *c, uiDrawTextFontMetrics *m)
{
uiDrawPath *p;
uiDrawBrush b;
uiDrawStrokeParams sp;
memset(&b, 0, sizeof (uiDrawBrush));
b.Type = uiDrawBrushTypeSolid;
memset(&sp, 0, sizeof (uiDrawStrokeParams));
sp.Cap = uiDrawLineCapFlat;
sp.Join = uiDrawLineJoinMiter;
sp.MiterLimit = uiDrawDefaultMiterLimit;
sp.Thickness = 2;
uiDrawSave(c);
p = uiDrawNewPath(uiDrawFillModeWinding);
uiDrawPathNewFigure(p, 8, 10);
uiDrawPathLineTo(p, 8, 10 + m->Ascent);
uiDrawPathEnd(p);
b.R = 0.94;
b.G = 0.5;
b.B = 0.5;
b.A = 1.0;
uiDrawStroke(c, p, &b, &sp);
uiDrawFreePath(p);
p = uiDrawNewPath(uiDrawFillModeWinding);
uiDrawPathNewFigure(p, 8, 10 + m->Ascent);
uiDrawPathLineTo(p, 8, 10 + m->Ascent + m->Descent);
uiDrawPathEnd(p);
b.R = 0.12;
b.G = 0.56;
b.B = 1.0;
b.A = 1.0;
uiDrawStroke(c, p, &b, &sp);
uiDrawFreePath(p);
p = uiDrawNewPath(uiDrawFillModeWinding);
uiDrawPathAddRectangle(p, 0, 0, 10, 10);
uiDrawPathEnd(p);
uiDrawClip(c, p);
b.R = 0.85;
b.G = 0.65;
b.B = 0.13;
b.A = 1.0;
uiDrawStroke(c, p, &b, &sp);
uiDrawFreePath(p);
uiDrawRestore(c);
}
static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *dp)
{
#if 0
uiDrawTextFontDescriptor desc;
uiDrawTextFont *font;
char *s;
char *family; // make compiler happy
uiDrawTextLayout *layout;
uiDrawTextFontMetrics metrics;
double ypos;
double width;
double height;
// TODO
memset(&desc, 0, sizeof (uiDrawTextFontDescriptor));
family = uiEntryText(textFont);
desc.Family = family;
desc.Size = entryDouble(textSize);
desc.Weight = uiComboboxSelected(textWeight);
desc.Italic = uiComboboxSelected(textItalic);
desc.SmallCaps = uiCheckboxChecked(textSmallCaps);
desc.Stretch = uiComboboxSelected(textStretch);
desc.Family = "Arial";
desc.Size = 36;
desc.Weight = uiDrawTextWeightNormal;
desc.Italic = uiDrawTextItalicNormal;
desc.Stretch = uiDrawTextStretchNormal;
font = uiDrawLoadClosestFont(&desc);
uiFreeText(family);
uiDrawTextFontGetMetrics(font, &metrics);
width = entryDouble(textWidth);
drawGuides(dp->Context, &metrics);
s = uiEntryText(textString);
layout = uiDrawNewTextLayout(s, font, width);
uiFreeText(s);
ypos = 10;
uiDrawText(dp->Context, 10, ypos, layout);
// TODO make these optional?
uiDrawTextLayoutExtents(layout, &width, &height);
uiDrawFreeTextLayout(layout);
layout = uiDrawNewTextLayout("This is a second line", font, -1);
if (/*TODO reuse width*/entryDouble(textWidth) < 0) {
double ad;
ad = metrics.Ascent + metrics.Descent;
printf("ad:%g extent:%g\n", ad, height);
}
ypos += height;
if (uiCheckboxChecked(addLeading))
ypos += metrics.Leading;
uiDrawText(dp->Context, 10, ypos, layout);
layout = uiDrawNewTextLayout(s, "One two three four", -1);
uiDrawTextLayoutSetForegroundColor(layout,
4, 7,
1, 0, 0, 1);
uiDrawTextLayoutSetForegroundColor(layout,
8, 14,
1, 0, 0.5, 0.5);
uiDrawText(dp->Context, 10, 10, layout);
uiDrawFreeTextLayout(layout);
uiDrawFreeTextFont(font);
#endif
}
static void handlerMouseEvent(uiAreaHandler *a, uiArea *area, uiAreaMouseEvent *e)

3
ui.h
View File

@ -522,6 +522,9 @@ _UI_EXTERN void uiDrawFreeTextLayout(uiDrawTextLayout *layout);
_UI_EXTERN void uiDrawTextLayoutSetWidth(uiDrawTextLayout *layout, double width);
_UI_EXTERN void uiDrawTextLayoutExtents(uiDrawTextLayout *layout, double *width, double *height);
// and the attributes that you can set on a text layout
_UI_EXTERN void uiDrawTextLayoutSetColor(uiDrawTextLayout *layout, intmax_t startChar, intmax_t endChar, double r, double g, double b, double a);
_UI_EXTERN void uiDrawText(uiDrawContext *c, double x, double y, uiDrawTextLayout *layout);
typedef enum uiModifiers {