import jalview.datamodel.HiddenColumns;
/**
- * Slightly less embryonic class which: Supplies and updates viewport properties
- * relating to position such as: start and end residues and sequences; ideally
- * will serve hidden columns/rows too. Intention also to support calculations
- * for positioning, scrolling etc. such as finding the middle of the viewport,
- * checking for scrolls off screen
+ * Supplies and updates viewport properties relating to position such as: start
+ * and end residues and sequences; ideally will serve hidden columns/rows too.
+ * Intention also to support calculations for positioning, scrolling etc. such
+ * as finding the middle of the viewport, checking for scrolls off screen
*/
public class ViewportRanges extends ViewportProperties
{
public static final String ENDSEQ = "endseq";
+ public static final String STARTRESANDSEQ = "startresandseq";
+
+ public static final String MOVE_VIEWPORT = "move_viewport";
+
private boolean wrappedMode = false;
// start residue of viewport
*/
public void setStartEndRes(int start, int end)
{
+ int[] oldvalues = updateStartEndRes(start, end);
+ int oldstartres = oldvalues[0];
+ int oldendres = oldvalues[1];
+
+ changeSupport.firePropertyChange(STARTRES, oldstartres, startRes);
+ if (oldstartres == startRes)
+ {
+ // event won't be fired if start positions are same
+ // fire an event for the end positions in case they changed
+ changeSupport.firePropertyChange(ENDRES, oldendres, endRes);
+ }
+ }
+
+ /**
+ * Update start and end residue values, adjusting for width constraints if
+ * necessary
+ *
+ * @param start
+ * start residue
+ * @param end
+ * end residue
+ * @return array containing old start and end residue values
+ */
+ private int[] updateStartEndRes(int start, int end)
+ {
int oldstartres = this.startRes;
/*
* if not wrapped, don't leave white space at the right margin
*/
- if (!wrappedMode && (start > getVisibleAlignmentWidth() - 1))
+ int lastColumn = getVisibleAlignmentWidth() - 1;
+ if (!wrappedMode && (start > lastColumn))
{
- startRes = Math.max(getVisibleAlignmentWidth() - 1, 0);
+ startRes = Math.max(lastColumn, 0);
}
else if (start < 0)
{
{
endRes = 0;
}
- else if (!wrappedMode && (end > getVisibleAlignmentWidth() - 1))
+ else if (!wrappedMode && (end > lastColumn))
{
- endRes = Math.max(getVisibleAlignmentWidth() - 1, 0);
+ endRes = Math.max(lastColumn, 0);
}
else
{
endRes = end;
}
-
- changeSupport.firePropertyChange(STARTRES, oldstartres, startRes);
- if (oldstartres == startRes)
- {
- // event won't be fired if start positions are same
- // fire an event for the end positions in case they changed
- changeSupport.firePropertyChange(ENDRES, oldendres, endRes);
- }
- }
-
- /**
- * Set last residue visible in the viewport. Fires a property change event.
- *
- * @param res
- * residue position
- */
- public void setEndRes(int res)
- {
- int startres = res;
- int width = getViewportWidth();
-
- /*
- * if not wrapped, don't leave white space at the right margin
- */
- if (!wrappedMode)
- {
- if (startres + width - 1 > getVisibleAlignmentWidth() - 1)
- {
- startres = getVisibleAlignmentWidth() - width;
- }
- }
- setStartEndRes(startres - width + 1, startres);
+ return new int[] { oldstartres, oldendres };
}
/**
*/
public void setStartEndSeq(int start, int end)
{
+ int[] oldvalues = updateStartEndSeq(start, end);
+ int oldstartseq = oldvalues[0];
+ int oldendseq = oldvalues[1];
+
+ changeSupport.firePropertyChange(STARTSEQ, oldstartseq, startSeq);
+ if (oldstartseq == startSeq)
+ {
+ // event won't be fired if start positions are the same
+ // fire in case the end positions changed
+ changeSupport.firePropertyChange(ENDSEQ, oldendseq, endSeq);
+ }
+ }
+
+ /**
+ * Update start and end sequence values, adjusting for height constraints if
+ * necessary
+ *
+ * @param start
+ * start sequence
+ * @param end
+ * end sequence
+ * @return array containing old start and end sequence values
+ */
+ private int[] updateStartEndSeq(int start, int end)
+ {
int oldstartseq = this.startSeq;
- if (start > getVisibleAlignmentHeight() - 1)
+ int visibleHeight = getVisibleAlignmentHeight();
+ if (start > visibleHeight - 1)
{
- startSeq = Math.max(getVisibleAlignmentHeight() - 1, 0);
+ startSeq = Math.max(visibleHeight - 1, 0);
}
else if (start < 0)
{
}
int oldendseq = this.endSeq;
- if (end >= getVisibleAlignmentHeight())
+ if (end >= visibleHeight)
{
- endSeq = Math.max(getVisibleAlignmentHeight() - 1, 0);
+ endSeq = Math.max(visibleHeight - 1, 0);
}
else if (end < 0)
{
{
endSeq = end;
}
-
- changeSupport.firePropertyChange(STARTSEQ, oldstartseq, startSeq);
- if (oldstartseq == startSeq)
- {
- // event won't be fired if start positions are the same
- // fire in case the end positions changed
- changeSupport.firePropertyChange(ENDSEQ, oldendseq, endSeq);
- }
+ return new int[] { oldstartseq, oldendseq };
}
/**
}
/**
+ * Set start residue and start sequence together (fires single event). The
+ * event supplies a pair of old values and a pair of new values: [old start
+ * residue, old start sequence] and [new start residue, new start sequence]
+ *
+ * @param res
+ * the start residue
+ * @param seq
+ * the start sequence
+ */
+ public void setStartResAndSeq(int res, int seq)
+ {
+ int width = getViewportWidth();
+ int[] oldresvalues = updateStartEndRes(res, res + width - 1);
+
+ int startseq = seq;
+ int height = getViewportHeight();
+ if (startseq + height - 1 > getVisibleAlignmentHeight() - 1)
+ {
+ startseq = getVisibleAlignmentHeight() - height;
+ }
+ int[] oldseqvalues = updateStartEndSeq(startseq, startseq + height - 1);
+
+ int[] old = new int[] { oldresvalues[0], oldseqvalues[0] };
+ int[] newresseq = new int[] { startRes, startSeq };
+ changeSupport.firePropertyChange(STARTRESANDSEQ, old, newresseq);
+ }
+
+ /**
* Get start residue of viewport
*/
public int getStartRes()
*/
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;
}
/**
{
scrollUp(false);
}
-
+
HiddenColumns hidden = al.getHiddenColumns();
while (x < hidden.adjustForHiddenColumns(startRes))
{
}
}
}
-
+
+ /**
+ * Set the viewport location so that a position is visible
+ *
+ * @param x
+ * column to be visible
+ * @param y
+ * row to be visible
+ */
+ public boolean setViewportLocation(int x, int y)
+ {
+ // if (x,y) is already visible don't do anything
+ boolean changedLocation = false;
+ if (startRes > x || x > endRes || startSeq > y && y > endSeq)
+ {
+ int width = getViewportWidth();
+ int[] oldresvalues = updateStartEndRes(x, x + width - 1);
+
+ int startseq = y;
+ int height = getViewportHeight();
+ if (startseq + height - 1 > getVisibleAlignmentHeight() - 1)
+ {
+ startseq = getVisibleAlignmentHeight() - height;
+ }
+ int[] oldseqvalues = updateStartEndSeq(startseq,
+ startseq + height - 1);
+
+ int[] old = new int[] { oldresvalues[0], oldseqvalues[0] };
+ int[] newresseq = new int[] { startRes, startSeq };
+ changedLocation = true;
+ changeSupport.firePropertyChange(MOVE_VIEWPORT, old, newresseq);
+ }
+ return changedLocation;
+ }
+
/**
* Adjust sequence position for page up. Fires a property change event.
*/
{
if (wrappedMode)
{
- setStartRes(getStartRes() - getViewportWidth());
+ setStartRes(Math.max(0, getStartRes() - getViewportWidth()));
}
else
{
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.
+ *
+ * <pre>
+ * Example:
+ * viewport width 40 columns (0-39, 40-79, 80-119...)
+ * column 0 returns scroll position 0
+ * columns 1-40 return scroll position 1
+ * columns 41-80 return scroll position 2
+ * etc
+ * </pre>
+ *
+ * @param topLeftColumn
+ * (0..)
+ * @return
+ */
+ public int getWrappedScrollPosition(final int topLeftColumn)
+ {
+ int w = getViewportWidth();
+
+ /*
+ * 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;
+ }
}
git://source.jalview.org / jalview.git / blobdiff