libui/zOLD_test/page7a.c

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// 13 october 2015
#include "test.h"
static uiArea *area;
static uiEntry *startAngle;
static uiEntry *sweep;
static uiCheckbox *negative;
static uiCheckbox *radians;
struct handler {
uiAreaHandler ah;
};
static struct handler handler;
// based on the cairo arc sample
static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *p)
{
double xc = 128.0;
double yc = 128.0;
double radius = 100.0;
uiDrawBrush source;
uiDrawStrokeParams sp;
uiDrawPath *path;
char *startText;
char *sweepText;
double factor;
source.Type = uiDrawBrushTypeSolid;
source.R = 0;
source.G = 0;
source.B = 0;
source.A = 1;
sp.Cap = uiDrawLineCapFlat;
sp.Join = uiDrawLineJoinMiter;
sp.MiterLimit = uiDrawDefaultMiterLimit;
sp.Dashes = NULL;
sp.NumDashes = 0;
sp.DashPhase = 0;
startText = uiEntryText(startAngle);
sweepText = uiEntryText(sweep);
factor = uiPi / 180;
if (uiCheckboxChecked(radians))
factor = 1;
sp.Thickness = 10.0;
path = uiDrawNewPath(uiDrawFillModeWinding);
uiDrawPathNewFigure(path, xc, yc);
uiDrawPathArcTo(path,
xc, yc,
radius,
atof(startText) * factor,
atof(sweepText) * factor,
uiCheckboxChecked(negative));
uiDrawPathEnd(path);
uiDrawStroke(p->Context, path, &source, &sp);
uiDrawFreePath(path);
uiFreeText(startText);
uiFreeText(sweepText);
}
static void handlerMouseEvent(uiAreaHandler *a, uiArea *area, uiAreaMouseEvent *e)
{
// do nothing
}
static void handlerMouseCrossed(uiAreaHandler *ah, uiArea *a, int left)
{
// do nothing
}
static void handlerDragBroken(uiAreaHandler *ah, uiArea *a)
{
// do nothing
}
static int handlerKeyEvent(uiAreaHandler *ah, uiArea *a, uiAreaKeyEvent *e)
{
return 0;
}
static void entryChanged(uiEntry *e, void *data)
{
uiAreaQueueRedrawAll(area);
}
static void checkboxToggled(uiCheckbox *c, void *data)
{
uiAreaQueueRedrawAll(area);
}
uiGroup *makePage7a(void)
{
uiGroup *group;
uiBox *box, *box2;
handler.ah.Draw = handlerDraw;
handler.ah.MouseEvent = handlerMouseEvent;
handler.ah.MouseCrossed = handlerMouseCrossed;
handler.ah.DragBroken = handlerDragBroken;
handler.ah.KeyEvent = handlerKeyEvent;
group = newGroup("Arc Test");
box = newVerticalBox();
uiGroupSetChild(group, uiControl(box));
area = uiNewArea((uiAreaHandler *) (&handler));
uiBoxAppend(box, uiControl(area), 1);
box2 = newHorizontalBox();
uiBoxAppend(box, uiControl(box2), 0);
uiBoxAppend(box2, uiControl(uiNewLabel("Start Angle")), 0);
startAngle = uiNewEntry();
uiEntryOnChanged(startAngle, entryChanged, NULL);
uiBoxAppend(box2, uiControl(startAngle), 1);
box2 = newHorizontalBox();
uiBoxAppend(box, uiControl(box2), 0);
uiBoxAppend(box2, uiControl(uiNewLabel("Sweep")), 0);
sweep = uiNewEntry();
uiEntryOnChanged(sweep, entryChanged, NULL);
uiBoxAppend(box2, uiControl(sweep), 1);
negative = uiNewCheckbox("Negative");
uiCheckboxOnToggled(negative, checkboxToggled, NULL);
uiBoxAppend(box, uiControl(negative), 0);
radians = uiNewCheckbox("Radians");
uiCheckboxOnToggled(radians, checkboxToggled, NULL);
uiBoxAppend(box, uiControl(radians), 0);
return group;
}