void
ChartWindow::OnPaint(Canvas &canvas)
{
canvas.ClearWhite();
ChartRenderer renderer(look, canvas, canvas.GetRect());
DrawChart(renderer);
}
int
main(void)
{
int h;
// initialize a flag
bool flag = false;
// keep asking for input until it's vaild
do
{
// ask for the height
printf("height: ");
// record users' input
h = GetInt();
// check the input
flag = CheckInput(h);
}
while (flag == false);
// draw the chart
DrawChart(h);
return 0;
}
void GDisplay::OnPaint(HDC hDC)
{
// Standard Setup
HDC hMemDC = ::CreateCompatibleDC(hDC);
if (hMemDC)
{
UINT dx = X_SHIFT_TO_CHART;
UINT dy = Y_SHIFT_TO_CHART;
RECT rcClient;
::SetRect(&rcClient, 0, 0, m_nClientWidth, m_nClientHeight);
HBITMAP hBmp = ::CreateCompatibleBitmap(hDC, m_nClientWidth, m_nClientHeight);
HGDIOBJ hOldBmp = ::SelectObject(hMemDC, hBmp);
// Draw only on hMemDC
// Delegate main work to the DrawChart function
//
Lock lock(&g_csSimData);
DrawChart(hMemDC, &rcClient, dx, dy);
lock.Release();
// My Logo !!!
//DrawLogo(hMemDC, rcClient.right - 120, rcClient.bottom - 30);
// Copies the source rectangle directly to the destination rectangle
::BitBlt(hDC, 0, 0, m_nClientWidth, m_nClientHeight, hMemDC, 0, 0,
SRCCOPY);
// Standard End
::SelectObject(hMemDC, hOldBmp);
::DeleteDC(hMemDC);
::DeleteObject(hBmp);
}
else
{
TRACE2("Memory DC was not created: %#X, Error code: %d\n",
hDC, GetLastError());
}
}
bool _HYChartWindow::_ProcessOSEvent (Ptr vEvent)
{
static long lastH = -1,
lastV = -1;
if (!_HYTWindow::_ProcessOSEvent (vEvent)) {
if (components.lLength == 0) {
return false;
}
_HYPullDown *p1 = (_HYPullDown*)GetObject (4);
if (p1&&(p1->GetSelection()>=8)&&(ySeries.lLength)) {
_HY_GTK_UI_Message *theMessage = (_HY_GTK_UI_Message*)vEvent;
gdouble xc,
yc;
gdk_event_get_coords (theMessage->theEvent,&xc,&yc);
switch (theMessage->theEvent->type) {
case GDK_BUTTON_PRESS: {
if (((GdkEventButton*)theMessage->theEvent)->button != 1) {
return false;
}
lastH = xc-theWindow->allocation.x-windowContent->allocation.x;
lastV = yc-theWindow->allocation.y-windowContent->allocation.y;
if (FindClickedCell(lastH, lastV)!=0) { // the chart
lastH = -1;
lastV = -1;
} else {
gdk_pointer_grab (theWindow->window,false,
(GdkEventMask)(GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK),
theWindow->window, NULL, ((GdkEventButton*)theMessage->theEvent)->time);
return true;
}
break;
}
case GDK_BUTTON_RELEASE: {
if (lastH>=0) {
gdk_pointer_ungrab (((GdkEventButton*)theMessage->theEvent)->time);
lastH = -1;
lastV = -1;
return true;
}
break;
}
case GDK_MOTION_NOTIFY: {
if (lastH>=0) {
long newH = xc-theWindow->allocation.x-windowContent->allocation.x,
newV = yc-theWindow->allocation.y-windowContent->allocation.y;
bool redraw = false;
_Parameter stepper = pi_const/180.;
if (abs(newH-lastH)>abs(newV-lastV)) {
stepper *= 1+log (fabs(newH-lastH))/log(2.0);
if (newH-lastH<0) {
if (xyAngle>0.0) {
xyAngle -= stepper;
if (xyAngle<0) {
xyAngle = 0;
}
redraw = true;
}
} else if (xyAngle<pi_const/2) {
xyAngle += stepper;
if (xyAngle>pi_const/2) {
xyAngle = pi_const/2;
}
redraw = true;
}
} else {
if (newV==lastV) {
return false;
}
stepper *= 1+log (fabs(newV-lastV))/log(2.0);
if (newV-lastV>0) {
if (zAngle<pi_const/2) {
zAngle += stepper;
if (zAngle>pi_const/2) {
zAngle = pi_const/2;
}
redraw = true;
}
} else if (zAngle>0.0) {
zAngle -= stepper;
if (zAngle<0) {
zAngle = 0;
}
redraw = true;
}
}
if (redraw) {
ComputeProjectionSettings();
projectionMatrix = ComputeProjectionMatrix ();
forceUpdateForScrolling = true;
DrawChart();
forceUpdateForScrolling = false;
}
lastH = newH;
lastV = newV;
}
break;
}
}
}
return false;
}
return true;
}
