/**
* when the scrolling procedure causes "steps" elements to fall out of the visible layout, all
* TimeTextViews swap their contents so that it appears that there happens an endless scrolling
* with a very limited amount of views
*
* @param steps
*/
protected void moveElements(int steps) {
if (steps < 0) {
for (int i = 0; i < getChildCount() + steps; i++) {
((TimeView) getChildAt(i)).setVals((TimeView) getChildAt(i - steps));
}
for (int i = getChildCount() + steps; i > 0 && i < getChildCount(); i++) {
DateSlider.TimeObject newTo = labeler.add(((TimeView) getChildAt(i - 1)).getEndTime(), 1);
((TimeView) getChildAt(i)).setVals(newTo);
}
if (getChildCount() + steps <= 0) {
for (int i = 0; i < getChildCount(); i++) {
DateSlider.TimeObject newTo =
labeler.add(((TimeView) getChildAt(i)).getEndTime(), -steps);
((TimeView) getChildAt(i)).setVals(newTo);
}
}
} else if (steps > 0) {
for (int i = getChildCount() - 1; i >= steps; i--) {
((TimeView) getChildAt(i)).setVals((TimeView) getChildAt(i - steps));
}
for (int i = steps - 1; i >= 0 && i < getChildCount() - 1; i--) {
DateSlider.TimeObject newTo = labeler.add(((TimeView) getChildAt(i + 1)).getEndTime(), -1);
((TimeView) getChildAt(i)).setVals(newTo);
}
if (steps >= getChildCount()) {
for (int i = 0; i < getChildCount(); i++) {
DateSlider.TimeObject newTo =
labeler.add(((TimeView) getChildAt(i)).getEndTime(), -steps);
((TimeView) getChildAt(i)).setVals(newTo);
}
}
}
}
/**
* This method is called usually after a ScrollLayout is instanciated, it provides the scroller
* with all necessary information
*
* @param labeler the labeler instance which will provide the ScrollLayout with time unit
* information
* @param time the start time as timestamp representation
* @param objwidth the width of an TimeTextView in dps
* @param objheight the height of an TimeTextView in dps
*/
public void setLabeler(DateSlider.Labeler labeler, long time, int objwidth, int objheight) {
this.labeler = labeler;
currentTime = time;
objWidth = (int) (objwidth * getContext().getResources().getDisplayMetrics().density);
objHeight = (int) (objheight * getContext().getResources().getDisplayMetrics().density);
// TODO: make it not dependent on the display width but rather on the layout width
Display display =
((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int displayWidth = display.getWidth();
while (displayWidth > childrenWidth - 0 * objWidth && labeler != null) {
LayoutParams lp = new LayoutParams(objWidth, objHeight);
if (childrenWidth == 0) {
TimeView ttv = labeler.createView(getContext(), true);
ttv.setVals(labeler.getElem(currentTime));
addView((View) ttv, lp);
mCenterView = ttv;
childrenWidth += objWidth;
}
TimeView ttv = labeler.createView(getContext(), false);
ttv.setVals(labeler.add(((TimeView) getChildAt(getChildCount() - 1)).getEndTime(), 1));
addView((View) ttv, lp);
ttv = labeler.createView(getContext(), false);
ttv.setVals(labeler.add(((TimeView) getChildAt(0)).getEndTime(), -1));
addView((View) ttv, 0, lp);
childrenWidth += objWidth + objWidth;
}
}
