void Browser::lastPage()
{
unsigned long offset;
if(this->page_size > this->file_size)
offset = 0;
else
offset = this->file_size - this->page_size;
this->loadBuffer(offset);
//
// Put the slider at the end.
//
int max;
int value;
int slider_size;
int inc;
int page_inc;
XtVaGetValues(this->vsb,
XmNmaximum, &max,
NULL);
XmScrollBarGetValues(this->vsb, &value, &slider_size, &inc, &page_inc);
XmScrollBarSetValues(this->vsb, max-slider_size,
slider_size, inc, page_inc, True);
this->updateOffsets(0);
}
void Browser::adjustScrollBar(Boolean top)
{
int min;
int max;
int value;
int slider_size;
int inc;
int page_inc;
//
// The idea is to place the slide bar 1/2 a "slider_size" away from the end.
//
XtVaGetValues(this->vsb,
XmNminimum, &min,
XmNmaximum, &max,
NULL);
XmScrollBarGetValues(this->vsb, &value, &slider_size, &inc, &page_inc);
if(top)
{
value = min + slider_size/2;
if(this->page_start == 0) value = min;
if(value > max - slider_size) value = max - slider_size;
}
else
{
value = max - slider_size/2 - slider_size;
if(value > max - slider_size) value = max - slider_size;
if(this->page_start == this->file_size - this->page_size)
value = max - slider_size;
if(value < min) value = min;
}
XmScrollBarSetValues(this->vsb, value, slider_size, inc, page_inc, True);
}
static void _UI2DViewVerScrollBarValueChangedCBK(Widget widget, UI2DView *view, XmScrollBarCallbackStruct *callData) {
int value, slider, incr, pgIncr;
double deltaY, freeLength;
DBRegion dataEXT = (UIDataset())->Extent(), viewEXT = view->Extent();
XmScrollBarGetValues(widget, &value, &slider, &incr, &pgIncr);
freeLength = (dataEXT.UpperRight.Y - dataEXT.LowerLeft.Y) - (viewEXT.UpperRight.Y - viewEXT.LowerLeft.Y);
deltaY = slider == 100 ? 0 : freeLength * value / (100.0 - slider);
deltaY -= dataEXT.UpperRight.Y - viewEXT.UpperRight.Y;
viewEXT.LowerLeft.Y = viewEXT.LowerLeft.Y - deltaY;
viewEXT.UpperRight.Y = viewEXT.UpperRight.Y - deltaY;
view->Set(viewEXT);
}