//
// Intercept WM_SETCURSOR to change the mouse cursor.
//
BOOL CChartViewer::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
if (m_isOnPlotArea)
{
switch (m_mouseUsage)
{
case Chart::MouseUsageZoomIn:
if (canZoomIn(m_zoomDirection))
::SetCursor(getZoomInCursor());
else
::SetCursor(getNoZoomCursor());
return TRUE;
case Chart::MouseUsageZoomOut:
if (canZoomOut(m_zoomDirection))
::SetCursor(getZoomOutCursor());
else
::SetCursor(getNoZoomCursor());
return TRUE;
}
}
if (m_isClickable)
{
// Hand cursor = IDC_HAND = 32649
HCURSOR h = AfxGetApp()->LoadStandardCursor(MAKEINTRESOURCE(32649));
if (NULL != h)
::SetCursor(h);
return TRUE;
}
return CStatic::OnSetCursor(pWnd, nHitTest, message);
}
void ImageWidget::emitZoomStateChanged()
{
emit canZoomInChanged(canZoomIn());
emit canZoomOutChanged(canZoomOut());
emit magnificationChanged(m_magnification);
emit autoImageResizeChanged(m_flagAutoImageResize);
}
void ImageWidget::zoomOut()
{
if (canZoomOut()) {
setAutoImageResize(false);
zoom(m_magnification * 0.5);
}
}
//
// Mouse left button up event.
//
void CChartViewer::OnLButtonUp(UINT nFlags, CPoint point)
{
mouse_state=true;
if (m_isPlotAreaMouseDown)
{
// Release the mouse capture.
ReleaseCapture();
m_isPlotAreaMouseDown = false;
setRectVisible(false);
bool hasUpdate = false;
switch (m_mouseUsage)
{
case Chart::MouseUsageZoomIn :
if (canZoomIn(m_zoomDirection))
{
if (isDrag(m_zoomDirection, point))
// Zoom to the drag selection rectangle.
hasUpdate = zoomTo(m_zoomDirection,
m_plotAreaMouseDownXPos, m_plotAreaMouseDownYPos, point.x, point.y);
else
// User just click on a point. Zoom-in around the mouse cursor position.
hasUpdate = zoomAt(m_zoomDirection, point.x, point.y, m_zoomInRatio);
}
break;
case Chart::MouseUsageZoomOut:
// Zoom out around the mouse cursor position.
if (canZoomOut(m_zoomDirection))
hasUpdate = zoomAt(m_zoomDirection, point.x, point.y, m_zoomOutRatio);
break;
default :
if (m_isDragScrolling)
// Drag to scroll. We can update the image map now as scrolling has finished.
updateViewPort(false, true);
else
// Is not zooming or scrolling, so is just a normal click event.
GetParent()->SendMessage(WM_COMMAND, MAKEWPARAM(GetDlgCtrlID(), BN_CLICKED), (LPARAM)m_hWnd);
break;
}
m_isDragScrolling = false;
if (hasUpdate)
// View port has changed - update it.
updateViewPort(true, true);
}
CStatic::OnLButtonUp(nFlags, point);
}
bool DisplayOptions::zoomOut()
{
if ( !canZoomOut() ) return false;
_magnification = allowedMagnifications[ closestIndex() - 1 ];
return true;
}
void ItemView::updateZoomActions() {
action("view_zoom_in")->setEnabled(canZoomIn());
action("view_zoom_out")->setEnabled(canZoomOut());
action("view_actual_size")->setEnabled(m_zoomLevel != 1.0);
}
