RectTracker
Positioning loop example
main.cpp
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
struct MyApp : TopWindow {
Rect rect;
int hline, vline;
typedef MyApp CLASSNAME;
void Round(Rect& r)
{
int cx = r.GetWidth();
r.left = r.left / 10 * 10;
r.right = r.left + cx;
}
virtual void Paint(Draw& w)
{
Size sz = GetSize();
w.DrawRect(sz, SColorPaper());
DrawFrame(w, rect, Black());
w.DrawRect(0, hline, sz.cx, 1, SRed);
w.DrawRect(vline, 0, 1, sz.cy, SBlue);
}
virtual void LeftDown(Point p, dword keyflags) {
RectTracker tr(*this);
Size sz = GetSize();
if(keyflags & K_ALT) {
tr.Dashed().Animation();
tr.round = THISBACK(Round);
rect = tr.Track(rect, ALIGN_CENTER, ALIGN_CENTER);
}
else
if(keyflags & K_SHIFT) {
tr.Solid();
hline = tr.TrackHorzLine(0, 0, sz.cx, hline);
}
else
if(keyflags & K_CTRL) {
tr.Solid();
vline = tr.TrackVertLine(0, 0, sz.cy, vline);
}
else {
tr.Normal();
rect = tr.Track(rect, ALIGN_RIGHT, ALIGN_BOTTOM);
}
Refresh();
}
MyApp() {
rect = RectC(100, 100, 100, 100);
hline = 150;
vline = 150;
}
};
GUI_APP_MAIN
{
MyApp().Run();
}
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