*/
public boolean scrollUp(boolean up)
{
+ /*
+ * if in unwrapped mode, scroll up or down one sequence row;
+ * if in wrapped mode, scroll by one visible width of columns
+ */
if (up)
{
- if (startSeq < 1)
+ if (wrappedMode)
{
- return false;
+ pageUp();
+ }
+ else
+ {
+ if (startSeq < 1)
+ {
+ return false;
+ }
+ setStartSeq(startSeq - 1);
}
-
- setStartSeq(startSeq - 1);
}
else
{
- if (endSeq >= getVisibleAlignmentHeight() - 1)
+ if (wrappedMode)
{
- return false;
+ pageDown();
+ }
+ else
+ {
+ if (endSeq >= getVisibleAlignmentHeight() - 1)
+ {
+ return false;
+ }
+ setStartSeq(startSeq + 1);
}
-
- setStartSeq(startSeq + 1);
}
return true;
}
}
/**
- * Scroll a wrapped alignment so that the specified residue is visible. Fires
- * a property change event.
+ * Scroll a wrapped alignment so that the specified residue is in the first
+ * repeat of the wrapped view. Fires a property change event. Answers true if
+ * the startRes changed, else false.
*
* @param res
* residue position to scroll to
+ * @return
*/
- public void scrollToWrappedVisible(int res)
+ public boolean scrollToWrappedVisible(int res)
{
- // get the start residue of the wrapped row which res is in
- // and set that as our start residue
+ int oldStartRes = startRes;
int width = getViewportWidth();
- setStartRes((res / width) * width);
+
+ if (res >= oldStartRes && res < oldStartRes + width)
+ {
+ return false;
+ }
+
+ boolean up = res < oldStartRes;
+ int widthsToScroll = Math.abs((res - oldStartRes) / width);
+ if (up)
+ {
+ widthsToScroll++;
+ }
+
+ int residuesToScroll = width * widthsToScroll;
+ int newStartRes = up ? oldStartRes - residuesToScroll : oldStartRes
+ + residuesToScroll;
+ if (newStartRes < 0)
+ {
+ newStartRes = 0;
+ }
+
+ setStartRes(newStartRes);
+
+ return true;
}
/**
}
}
}
-
+
/**
* Adjust sequence position for page up. Fires a property change event.
*/
getViewportHeight());
}
}
-
+
/**
* Adjust sequence position for page down. Fires a property change event.
*/
wrappedMode = wrapped;
}
+ public boolean isWrappedMode()
+ {
+ return wrappedMode;
+ }
+
/**
* Answers the vertical scroll position (0..) to set, given the visible column
- * that is at top left. Note that if called with the total visible width of
- * the alignment, this gives the maximum cursor scroll value.
+ * that is at top left.
*
* <pre>
* Example:
* viewport width 40 columns (0-39, 40-79, 80-119...)
* column 0 returns scroll position 0
- * columns 0-40 return scroll position 1
+ * columns 1-40 return scroll position 1
* columns 41-80 return scroll position 2
* etc
* </pre>
* visible whole widths
*/
int scroll = topLeftColumn / w;
+
+ /*
+ * add 1 for a part width if there is one
+ */
scroll += topLeftColumn % w > 0 ? 1 : 0;
return scroll;
}
+
+ /**
+ * Answers the maximum wrapped vertical scroll value, given the column
+ * position (0..) to show at top left of the visible region.
+ *
+ * @param topLeftColumn
+ * @return
+ */
+ public int getWrappedMaxScroll(int topLeftColumn)
+ {
+ int scrollPosition = getWrappedScrollPosition(topLeftColumn);
+
+ /*
+ * how many more widths could be drawn after this one?
+ */
+ int columnsRemaining = getVisibleAlignmentWidth() - topLeftColumn;
+ int width = getViewportWidth();
+ int widthsRemaining = columnsRemaining / width
+ + (columnsRemaining % width > 0 ? 1 : 0) - 1;
+ int maxScroll = scrollPosition + widthsRemaining;
+
+ return maxScroll;
+ }
}