/** * Write out the columns. After writing, use {@link #isOverflow()} to see if all text was written. * * @param canvas PdfContentByte to write with * @param document document to write to (only used to get page limit info) * @param documentY starting y position to begin writing at * @return the current height (y position) after writing the columns * @throws DocumentException on error */ public float write(PdfContentByte canvas, PdfDocument document, float documentY) throws DocumentException { this.document = document; columnText.setCanvas(canvas); if (columnDefs.isEmpty()) { throw new DocumentException("MultiColumnText has no columns"); } overflow = false; float currentHeight = 0; boolean done = false; try { while (!done) { if (top == AUTOMATIC) { top = document.getVerticalPosition( true); // RS - 07/07/2005 - Get current doc writing position for top of columns on // new page. } else if (nextY == AUTOMATIC) { nextY = document.getVerticalPosition( true); // RS - 07/07/2005 - - Get current doc writing position for top of columns // on new page. } ColumnDef currentDef = (ColumnDef) columnDefs.get(getCurrentColumn()); columnText.setYLine(top); float[] left = currentDef.resolvePositions(Rectangle.LEFT); float[] right = currentDef.resolvePositions(Rectangle.RIGHT); if (document.isMarginMirroring() && document.getPageNumber() % 2 == 0) { float delta = document.rightMargin() - document.left(); left = (float[]) left.clone(); right = (float[]) right.clone(); for (int i = 0; i < left.length; i += 2) { left[i] -= delta; } for (int i = 0; i < right.length; i += 2) { right[i] -= delta; } } currentHeight = Math.max(currentHeight, getHeight(left, right)); if (currentDef.isSimple()) { columnText.setSimpleColumn(left[2], left[3], right[0], right[1]); } else { columnText.setColumns(left, right); } int result = columnText.go(); if ((result & ColumnText.NO_MORE_TEXT) != 0) { done = true; top = columnText.getYLine(); } else if (shiftCurrentColumn()) { top = nextY; } else { // check if we are done because of height totalHeight += currentHeight; if ((desiredHeight != AUTOMATIC) && (totalHeight >= desiredHeight)) { overflow = true; break; } else { // need to start new page and reset the columns documentY = nextY; newPage(); currentHeight = 0; } } } } catch (DocumentException ex) { ex.printStackTrace(); throw ex; } if (desiredHeight == AUTOMATIC && columnDefs.size() == 1) { currentHeight = documentY - columnText.getYLine(); } return currentHeight; }
/** * Add a new column. The parameters are limits for each column wall in the format of a sequence of * points (x1,y1,x2,y2,...). * * @param left limits for left column * @param right limits for right column */ public void addColumn(float[] left, float[] right) { ColumnDef nextDef = new ColumnDef(left, right); if (!nextDef.isSimple()) simple = false; columnDefs.add(nextDef); }