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More work on the histogram example.

This commit is contained in:
Pietro Gagliardi 2015-10-13 16:40:05 -04:00
parent 6018780970
commit 3f0133f57a
1 changed files with 26 additions and 4 deletions
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30
examples/histogram/main.c
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@ -1,6 +1,8 @@
// 13 october 2015
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include "../../ui.h"
uiWindow *mainwin;
@ -90,6 +92,12 @@ static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *p)
graphWidth = p->ClientWidth - xoffLeft - xoffRight;
graphHeight = p->ClientHeight - yoffTop - yoffBottom;
// make a stroke for both the axes and the histogram line
sp.Cap = uiDrawLineCapFlat;
sp.Join = uiDrawLineJoinMiter;
sp.Thickness = 2;
sp.MiterLimit = uiDrawDefaultMiterLimit;
// draw the axes
setSolidBrush(&brush, colorBlack, 1.0);
path = uiDrawNewPath(uiDrawFillModeWinding);
@ -100,10 +108,6 @@ static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *p)
uiDrawPathLineTo(path,
xoffLeft + graphWidth, yoffTop + graphHeight);
uiDrawPathEnd(path);
sp.Cap = uiDrawLineCapFlat;
sp.Join = uiDrawLineJoinMiter;
sp.Thickness = 2;
sp.MiterLimit = uiDrawDefaultMiterLimit;
uiDrawStroke(p->Context, path, &brush, &sp);
uiDrawFreePath(path);
@ -117,20 +121,29 @@ static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *p)
setSolidBrush(&brush, colorDodgerBlue, 0.5);
uiDrawFill(p->Context, path, &brush);
uiDrawFreePath(path);
// now draw the histogram line
path = constructGraph(graphWidth, graphHeight, 0);
setSolidBrush(&brush, colorDodgerBlue, 1.0);
uiDrawStroke(p->Context, path, &brush, &sp);
uiDrawFreePath(path);
}
static uintmax_t handlerHScrollMax(uiAreaHandler *a, uiArea *area)
{
// we don't scroll
return 0;
}
static uintmax_t handlerVScrollMax(uiAreaHandler *a, uiArea *area)
{
// we don't scroll
return 0;
}
static int handlerRedrawOnResize(uiAreaHandler *a, uiArea *area)
{
// always redraw on resize; we don't scroll
return 1;
}
@ -146,9 +159,15 @@ static void handlerDragBroken(uiAreaHandler *ah, uiArea *a)
static int handlerKeyEvent(uiAreaHandler *ah, uiArea *a, uiAreaKeyEvent *e)
{
// reject all keys
return 0;
}
static void onDatapointChanged(uiSpinbox *s, void *data)
{
uiAreaQueueRedrawAll(histogram);
}
static int onClosing(uiWindow *w, void *data)
{
uiControlDestroy(uiControl(mainwin));
@ -199,8 +218,11 @@ int main(void)
uiBoxSetPadded(vbox, 1);
uiBoxAppend(hbox, uiControl(vbox), 0);
srand(time(NULL));
for (i = 0; i < 10; i++) {
datapoints[i] = uiNewSpinbox(0, 100);
uiSpinboxSetValue(datapoints[i], rand() % 101);
uiSpinboxOnChanged(datapoints[i], onDatapointChanged, NULL);
uiBoxAppend(vbox, uiControl(datapoints[i]), 0);
}