/**
* Zoom in the graph
*
* <p>拡大表示する。
*
* <p>放大表示
*/
public void zoomIn() {
if (displayNumber > minDisplayNumber) {
// 区分缩放方向
if (zoomBaseLine == ZOOM_BASE_LINE_CENTER) {
displayNumber = displayNumber - ZOOM_STEP;
displayFrom = displayFrom + ZOOM_STEP / 2;
} else if (zoomBaseLine == ZOOM_BASE_LINE_LEFT) {
displayNumber = displayNumber - ZOOM_STEP;
} else if (zoomBaseLine == ZOOM_BASE_LINE_RIGHT) {
displayNumber = displayNumber - ZOOM_STEP;
displayFrom = displayFrom + ZOOM_STEP;
}
// 处理displayNumber越界
if (displayNumber < minDisplayNumber) {
displayNumber = minDisplayNumber;
}
// 处理displayFrom越界
if (displayFrom + displayNumber >= stickData.size()) {
displayFrom = stickData.size() - displayNumber;
}
// Listener
if (onZoomGestureListener != null) {
onZoomGestureListener.onZoom(ZOOM_IN, displayFrom, displayNumber);
}
}
}
/**
* Zoom out the grid
*
* <p>縮小表示する。
*
* <p>缩小
*/
public void zoomOut() {
if (displayNumber < stickData.size() - 1) {
if (displayNumber + ZOOM_STEP > stickData.size() - 1) {
displayNumber = stickData.size() - 1;
displayFrom = 0;
} else {
// 区分缩放方向
if (zoomBaseLine == ZOOM_BASE_LINE_CENTER) {
displayNumber = displayNumber + ZOOM_STEP;
if (displayFrom > 1) {
displayFrom = displayFrom - ZOOM_STEP / 2;
} else {
displayFrom = 0;
}
} else if (zoomBaseLine == ZOOM_BASE_LINE_LEFT) {
displayNumber = displayNumber + ZOOM_STEP;
} else if (zoomBaseLine == ZOOM_BASE_LINE_RIGHT) {
displayNumber = displayNumber + ZOOM_STEP;
if (displayFrom > ZOOM_STEP) {
displayFrom = displayFrom - ZOOM_STEP;
} else {
displayFrom = 0;
}
}
}
if (displayFrom + displayNumber >= stickData.size()) {
displayNumber = stickData.size() - displayFrom;
}
// Listener
if (onZoomGestureListener != null) {
onZoomGestureListener.onZoom(ZOOM_OUT, displayFrom, displayNumber);
}
}
}