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- /*
- @ITMillApache2LicenseForJavaFiles@
- */
-
- package com.itmill.toolkit.ui;
-
- import java.util.Collections;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.LinkedList;
- import java.util.Map;
-
- import com.itmill.toolkit.terminal.PaintException;
- import com.itmill.toolkit.terminal.PaintTarget;
-
- /**
- * <p>
- * A container that consists of components with certain coordinates (cell
- * position) on a grid. It also maintains cursor for adding component in left to
- * right, top to bottom order.
- * </p>
- *
- * <p>
- * Each component in a <code>GridLayout</code> uses a certain
- * {@link GridLayout.Area area} (column1,row1,column2,row2) from the grid. One
- * should not add components that would overlap with the existing components
- * because in such case an {@link OverlapsException} is thrown. Adding component
- * with cursor automatically extends the grid by increasing the grid height.
- * </p>
- *
- * @author IT Mill Ltd.
- * @version
- * @VERSION@
- * @since 3.0
- */
- public class GridLayout extends AbstractLayout implements
- Layout.AlignmentHandler, Layout.SpacingHandler {
-
- /**
- * Initial grid columns.
- */
- private int cols = 0;
-
- /**
- * Initial grid rows.
- */
- private int rows = 0;
-
- /**
- * Cursor X position: this is where the next component with unspecified x,y
- * is inserted
- */
- private int cursorX = 0;
-
- /**
- * Cursor Y position: this is where the next component with unspecified x,y
- * is inserted
- */
- private int cursorY = 0;
-
- /**
- * Contains all items that are placed on the grid. These are components with
- * grid area definition.
- */
- private final LinkedList areas = new LinkedList();
-
- /**
- * Mapping from components to their respective areas.
- */
- private final LinkedList components = new LinkedList();
-
- /**
- * Mapping from components to alignments (horizontal + vertical).
- */
- private Map componentToAlignment = new HashMap();
-
- /**
- * Is spacing between contained components enabled. Defaults to false.
- */
- private boolean spacing = false;
-
- private static final int ALIGNMENT_DEFAULT = ALIGNMENT_TOP + ALIGNMENT_LEFT;
-
- /**
- * Has there been rows inserted or deleted in the middle of the layout since
- * the last paint operation.
- */
- private boolean structuralChange = false;
-
- /**
- * Constructor for grid of given size (number of cells). Note that grid's
- * final size depends on the items that are added into the grid. Grid grows
- * if you add components outside the grid's area.
- *
- * @param columns
- * Number of columns in the grid.
- * @param rows
- * Number of rows in the grid.
- */
- public GridLayout(int columns, int rows) {
- setColumns(columns);
- setRows(rows);
- }
-
- /**
- * Constructs an empty grid layout that is extended as needed.
- */
- public GridLayout() {
- this(1, 1);
- }
-
- /**
- * <p>
- * Adds a component with a specified area to the grid. The area the new
- * component should take is defined by specifying the upper left corner
- * (column1, row1) and the lower right corner (column2, row2) of the area.
- * </p>
- *
- * <p>
- * If the new component overlaps with any of the existing components already
- * present in the grid the operation will fail and an
- * {@link OverlapsException} is thrown.
- * </p>
- *
- * @param c
- * the component to be added.
- * @param column1
- * the column of the upper left corner of the area <code>c</code>
- * is supposed to occupy.
- * @param row1
- * the row of the upper left corner of the area <code>c</code> is
- * supposed to occupy.
- * @param column2
- * the column of the lower right corner of the area
- * <code>c</code> is supposed to occupy.
- * @param row2
- * the row of the lower right corner of the area <code>c</code>
- * is supposed to occupy.
- * @throws OverlapsException
- * if the new component overlaps with any of the components
- * already in the grid.
- * @throws OutOfBoundsException
- * if the cells are outside of the grid area.
- */
- public void addComponent(Component component, int column1, int row1,
- int column2, int row2) throws OverlapsException,
- OutOfBoundsException {
-
- if (component == null) {
- throw new NullPointerException("Component must not be null");
- }
-
- // Checks that the component does not already exist in the container
- if (components.contains(component)) {
- throw new IllegalArgumentException(
- "Component is already in the container");
- }
-
- // Creates the area
- final Area area = new Area(component, column1, row1, column2, row2);
-
- // Checks the validity of the coordinates
- if (column2 < column1 || row2 < row1) {
- throw new IllegalArgumentException(
- "Illegal coordinates for the component");
- }
- if (column1 < 0 || row1 < 0 || column2 >= cols || row2 >= rows) {
- throw new OutOfBoundsException(area);
- }
-
- // Checks that newItem does not overlap with existing items
- checkExistingOverlaps(area);
-
- // first attemt to add to super
- super.addComponent(component);
-
- // Inserts the component to right place at the list
- // Respect top-down, left-right ordering
- // component.setParent(this);
- final Iterator i = areas.iterator();
- int index = 0;
- boolean done = false;
- while (!done && i.hasNext()) {
- final Area existingArea = (Area) i.next();
- if ((existingArea.row1 >= row1 && existingArea.column1 > column1)
- || existingArea.row1 > row1) {
- areas.add(index, area);
- components.add(index, component);
- done = true;
- }
- index++;
- }
- if (!done) {
- areas.addLast(area);
- components.addLast(component);
- }
-
- // update cursor position, if it's within this area; use first position
- // outside this area, even if it's occupied
- if (cursorX >= column1 && cursorX <= column2 && cursorY >= row1
- && cursorY <= row2) {
- cursorX = column2 + 1;
- if (cursorX >= cols) {
- cursorX = 0;
- cursorY = (column1 == 0 ? row2 : row1) + 1;
- } else {
- cursorY = row1;
- }
- }
-
- requestRepaint();
- }
-
- /**
- * Tests if the given area overlaps with any of the items already on the
- * grid.
- *
- * @param area
- * the Area to be checked for overlapping.
- * @throws OverlapsException
- * if <code>area</code> overlaps with any existing area.
- */
- private void checkExistingOverlaps(Area area) throws OverlapsException {
- for (final Iterator i = areas.iterator(); i.hasNext();) {
- final Area existingArea = (Area) i.next();
- if (existingArea.overlaps(area)) {
- // Component not added, overlaps with existing component
- throw new OverlapsException(existingArea);
- }
- }
- }
-
- /**
- * Adds the component into this container to cells column1,row1 (NortWest
- * corner of the area.) End coordinates (SouthEast corner of the area) are
- * the same as column1,row1. Component width and height is 1.
- *
- * @param c
- * the component to be added.
- * @param column
- * the column index.
- * @param row
- * the row index.
- */
- public void addComponent(Component c, int column, int row) {
- this.addComponent(c, column, row, column, row);
- }
-
- /**
- * Force the next component to be added to the beginning of the next line.
- * By calling this function user can ensure that no more components are
- * added to the right of the previous component.
- *
- * @see #space()
- */
- public void newLine() {
- cursorX = 0;
- cursorY++;
- }
-
- /**
- * Moves the cursor forwards by one. If the cursor goes out of the right
- * grid border, move it to next line.
- *
- * @see #newLine()
- */
- public void space() {
- cursorX++;
- if (cursorX >= cols) {
- cursorX = 0;
- cursorY++;
- }
- }
-
- /**
- * Adds the component into this container to the cursor position. If the
- * cursor position is already occupied, the cursor is moved forwards to find
- * free position. If the cursor goes out from the bottom of the grid, the
- * grid is automatically extended.
- *
- * @param c
- * the component to be added.
- */
- public void addComponent(Component component) {
-
- // Finds first available place from the grid
- Area area;
- boolean done = false;
- while (!done) {
- try {
- area = new Area(component, cursorX, cursorY, cursorX, cursorY);
- checkExistingOverlaps(area);
- done = true;
- } catch (final OverlapsException e) {
- space();
- }
- }
-
- // Extends the grid if needed
- cols = cursorX >= cols ? cursorX + 1 : cols;
- rows = cursorY >= rows ? cursorY + 1 : rows;
-
- addComponent(component, cursorX, cursorY);
- }
-
- /**
- * Removes the given component from this container.
- *
- * @param c
- * the component to be removed.
- */
- public void removeComponent(Component component) {
-
- // Check that the component is contained in the container
- if (component == null || !components.contains(component)) {
- return;
- }
-
- super.removeComponent(component);
-
- Area area = null;
- for (final Iterator i = areas.iterator(); area == null && i.hasNext();) {
- final Area a = (Area) i.next();
- if (a.getComponent() == component) {
- area = a;
- }
- }
-
- components.remove(component);
- if (area != null) {
- areas.remove(area);
- }
-
- componentToAlignment.remove(component);
-
- requestRepaint();
- }
-
- /**
- * Removes the component specified with it's cell index.
- *
- * @param column
- * the Component's column.
- * @param row
- * the Component's row.
- */
- public void removeComponent(int column, int row) {
-
- // Finds the area
- for (final Iterator i = areas.iterator(); i.hasNext();) {
- final Area area = (Area) i.next();
- if (area.getColumn1() == column && area.getRow1() == row) {
- removeComponent(area.getComponent());
- return;
- }
- }
- }
-
- /**
- * Gets an Iterator to the component container contents. Using the Iterator
- * it's possible to step through the contents of the container.
- *
- * @return the Iterator of the components inside the container.
- */
- public Iterator getComponentIterator() {
- return Collections.unmodifiableCollection(components).iterator();
- }
-
- /**
- * Paints the contents of this component.
- *
- * @param target
- * the Paint Event.
- * @throws PaintException
- * if the paint operation failed.
- */
- public void paintContent(PaintTarget target) throws PaintException {
-
- super.paintContent(target);
-
- // TODO refactor attribute names in future release.
- target.addAttribute("h", rows);
- target.addAttribute("w", cols);
-
- target.addAttribute("structuralChange", structuralChange);
- structuralChange = false;
-
- if (spacing) {
- target.addAttribute("spacing", spacing);
- }
-
- // Area iterator
- final Iterator areaiterator = areas.iterator();
-
- // Current item to be processed (fetch first item)
- Area area = areaiterator.hasNext() ? (Area) areaiterator.next() : null;
-
- // Collects rowspan related information here
- final HashMap cellUsed = new HashMap();
-
- // Empty cell collector
- int emptyCells = 0;
-
- final String[] alignmentsArray = new String[components.size()];
- int index = 0;
-
- // Iterates every applicable row
- for (int cury = 0; cury < rows; cury++) {
- target.startTag("gr");
-
- // Iterates every applicable column
- for (int curx = 0; curx < cols; curx++) {
-
- // Checks if current item is located at curx,cury
- if (area != null && (area.row1 == cury)
- && (area.column1 == curx)) {
-
- // First check if empty cell needs to be rendered
- if (emptyCells > 0) {
- target.startTag("gc");
- target.addAttribute("x", curx - emptyCells);
- target.addAttribute("y", cury);
- if (emptyCells > 1) {
- target.addAttribute("w", emptyCells);
- }
- target.endTag("gc");
- emptyCells = 0;
- }
-
- // Now proceed rendering current item
- final int cols = (area.column2 - area.column1) + 1;
- final int rows = (area.row2 - area.row1) + 1;
- target.startTag("gc");
-
- target.addAttribute("x", curx);
- target.addAttribute("y", cury);
-
- if (cols > 1) {
- target.addAttribute("w", cols);
- }
- if (rows > 1) {
- target.addAttribute("h", rows);
- }
- area.getComponent().paint(target);
-
- alignmentsArray[index++] = String
- .valueOf(getComponentAlignment(area.getComponent()));
-
- target.endTag("gc");
-
- // Fetch next item
- if (areaiterator.hasNext()) {
- area = (Area) areaiterator.next();
- } else {
- area = null;
- }
-
- // Updates the cellUsed if rowspan needed
- if (rows > 1) {
- int spannedx = curx;
- for (int j = 1; j <= cols; j++) {
- cellUsed.put(new Integer(spannedx), new Integer(
- cury + rows - 1));
- spannedx++;
- }
- }
-
- // Skips the current item's spanned columns
- if (cols > 1) {
- curx += cols - 1;
- }
-
- } else {
-
- // Checks against cellUsed, render space or ignore cell
- if (cellUsed.containsKey(new Integer(curx))) {
-
- // Current column contains already an item,
- // check if rowspan affects at current x,y position
- final int rowspanDepth = ((Integer) cellUsed
- .get(new Integer(curx))).intValue();
-
- if (rowspanDepth >= cury) {
-
- // ignore cell
- // Check if empty cell needs to be rendered
- if (emptyCells > 0) {
- target.startTag("gc");
- target.addAttribute("x", curx - emptyCells);
- target.addAttribute("y", cury);
- if (emptyCells > 1) {
- target.addAttribute("w", emptyCells);
- }
- target.endTag("gc");
-
- emptyCells = 0;
- }
- } else {
-
- // empty cell is needed
- emptyCells++;
-
- // Removes the cellUsed key as it has become
- // obsolete
- cellUsed.remove(new Integer(curx));
- }
- } else {
-
- // empty cell is needed
- emptyCells++;
- }
- }
-
- } // iterates every column
-
- // Last column handled of current row
-
- // Checks if empty cell needs to be rendered
- if (emptyCells > 0) {
- target.startTag("gc");
- target.addAttribute("x", cols - emptyCells);
- target.addAttribute("y", cury);
- if (emptyCells > 1) {
- target.addAttribute("w", emptyCells);
- }
- target.endTag("gc");
-
- emptyCells = 0;
- }
-
- target.endTag("gr");
- } // iterates every row
-
- // Last row handled
-
- // Add child component alignment info to layout tag
- target.addAttribute("alignments", alignmentsArray);
-
- }
-
- /*
- * (non-Javadoc)
- *
- * @see
- * com.itmill.toolkit.ui.Layout.AlignmentHandler#getComponentAlignment(com
- * .itmill.toolkit.ui.Component)
- */
- public int getComponentAlignment(Component childComponent) {
- final Integer bitMask = (Integer) componentToAlignment
- .get(childComponent);
- if (bitMask != null) {
- return bitMask.intValue();
- } else {
- return ALIGNMENT_DEFAULT;
- }
- }
-
- /**
- * Gets the components UIDL tag.
- *
- * @return the Component UIDL tag as string.
- * @see com.itmill.toolkit.ui.AbstractComponent#getTag()
- */
- public String getTag() {
- return "gridlayout";
- }
-
- /**
- * This class defines an area on a grid. An Area is defined by the cells of
- * its upper left corner (column1,row1) and lower right corner
- * (column2,row2).
- *
- * @author IT Mill Ltd.
- * @version
- * @VERSION@
- * @since 3.0
- */
- public class Area {
-
- /**
- * The column of the upper left corner cell of the area.
- */
- private final int column1;
-
- /**
- * The row of the upper left corner cell of the area.
- */
- private int row1;
-
- /**
- * The column of the lower right corner cell of the area.
- */
- private final int column2;
-
- /**
- * The row of the lower right corner cell of the area.
- */
- private int row2;
-
- /**
- * Component painted on the area.
- */
- private Component component;
-
- /**
- * <p>
- * Construct a new area on a grid.
- * </p>
- *
- * @param component
- * the component connected to the area.
- * @param column1
- * The column of the upper left corner cell of the area
- * <code>c</code> is supposed to occupy.
- * @param row1
- * The row of the upper left corner cell of the area
- * <code>c</code> is supposed to occupy.
- * @param column2
- * The column of the lower right corner cell of the area
- * <code>c</code> is supposed to occupy.
- * @param row2
- * The row of the lower right corner cell of the area
- * <code>c</code> is supposed to occupy.
- * @throws OverlapsException
- * if the new component overlaps with any of the components
- * already in the grid
- */
- public Area(Component component, int column1, int row1, int column2,
- int row2) {
- this.column1 = column1;
- this.row1 = row1;
- this.column2 = column2;
- this.row2 = row2;
- this.component = component;
- }
-
- /**
- * Tests if the given Area overlaps with an another Area.
- *
- * @param other
- * the Another Area that's to be tested for overlap with this
- * area.
- * @return <code>true</code> if <code>other</code> overlaps with this
- * area, <code>false</code> if it doesn't.
- */
- public boolean overlaps(Area other) {
- return column1 <= other.getColumn2() && row1 <= other.getRow2()
- && column2 >= other.getColumn1() && row2 >= other.getRow1();
-
- }
-
- /**
- * Gets the component connected to the area.
- *
- * @return the Component.
- */
- public Component getComponent() {
- return component;
- }
-
- /**
- * Sets the component connected to the area.
- *
- * <p>
- * This function only sets the value in the datastructure and does not
- * send any events or set parents.
- * </p>
- *
- * @param newComponent
- * the new connected overriding the existing one.
- */
- protected void setComponent(Component newComponent) {
- component = newComponent;
- }
-
- /**
- * @deprecated Use getColumn1() instead.
- *
- * @see com.itmill.toolkit.ui.GridLayout#getColumn1()
- */
- public int getX1() {
- return getColumn1();
- }
-
- /**
- * Gets the column of the top-left corner cell.
- *
- * @return the column of the top-left corner cell.
- */
- public int getColumn1() {
- return column1;
- }
-
- /**
- * @deprecated Use getColumn2() instead.
- *
- * @see com.itmill.toolkit.ui.GridLayout#getColumn2()
- */
- public int getX2() {
- return getColumn2();
- }
-
- /**
- * Gets the column of the bottom-right corner cell.
- *
- * @return the column of the bottom-right corner cell.
- */
- public int getColumn2() {
- return column2;
- }
-
- /**
- * @deprecated Use getRow1() instead.
- *
- * @see com.itmill.toolkit.ui.GridLayout#getRow1()
- */
- public int getY1() {
- return getRow1();
- }
-
- /**
- * Gets the row of the top-left corner cell.
- *
- * @return the row of the top-left corner cell.
- */
- public int getRow1() {
- return row1;
- }
-
- /**
- * @deprecated Use getRow2() instead.
- *
- * @see com.itmill.toolkit.ui.GridLayout#getRow2()
- */
- public int getY2() {
- return getRow2();
- }
-
- /**
- * Gets the row of the bottom-right corner cell.
- *
- * @return the row of the bottom-right corner cell.
- */
- public int getRow2() {
- return row2;
- }
-
- }
-
- /**
- * An <code>Exception</code> object which is thrown when two Items occupy
- * the same space on a grid.
- *
- * @author IT Mill Ltd.
- * @version
- * @VERSION@
- * @since 3.0
- */
- public class OverlapsException extends java.lang.RuntimeException {
-
- /**
- * Serial generated by eclipse.
- */
- private static final long serialVersionUID = 3978144339870101561L;
-
- private final Area existingArea;
-
- /**
- * Constructs an <code>OverlapsException</code>.
- *
- * @param existingArea
- */
- public OverlapsException(Area existingArea) {
- this.existingArea = existingArea;
- }
-
- /**
- * Gets the area .
- *
- * @return the existing area.
- */
- public Area getArea() {
- return existingArea;
- }
- }
-
- /**
- * An <code>Exception</code> object which is thrown when an area exceeds the
- * bounds of the grid.
- *
- * @author IT Mill Ltd.
- * @version
- * @VERSION@
- * @since 3.0
- */
- public class OutOfBoundsException extends java.lang.RuntimeException {
-
- /**
- * Serial generated by eclipse.
- */
- private static final long serialVersionUID = 3618985589664592694L;
-
- private final Area areaOutOfBounds;
-
- /**
- * Constructs an <code>OoutOfBoundsException</code> with the specified
- * detail message.
- *
- * @param areaOutOfBounds
- */
- public OutOfBoundsException(Area areaOutOfBounds) {
- this.areaOutOfBounds = areaOutOfBounds;
- }
-
- /**
- * Gets the area that is out of bounds.
- *
- * @return the area out of Bound.
- */
- public Area getArea() {
- return areaOutOfBounds;
- }
- }
-
- /**
- * Sets the number of columns in the grid. The column count can not be
- * reduced if there are any areas that would be outside of the shrunk grid.
- *
- * @param columns
- * the new number of columns in the grid.
- */
- public void setColumns(int columns) {
-
- // The the param
- if (columns < 1) {
- throw new IllegalArgumentException(
- "The number of columns and rows in the grid must be at least 1");
- }
-
- // In case of no change
- if (cols == columns) {
- return;
- }
-
- // Checks for overlaps
- if (cols > columns) {
- for (final Iterator i = areas.iterator(); i.hasNext();) {
- final Area area = (Area) i.next();
- if (area.column2 >= columns) {
- throw new OutOfBoundsException(area);
- }
- }
- }
-
- cols = columns;
-
- requestRepaint();
- }
-
- /**
- * Get the number of columns in the grid.
- *
- * @return the number of columns in the grid.
- */
- public final int getColumns() {
- return cols;
- }
-
- /**
- * Sets the number of rows in the grid. The number of rows can not be
- * reduced if there are any areas that would be outside of the shrunk grid.
- *
- * @param rows
- * the new number of rows in the grid.
- */
- public void setRows(int rows) {
-
- // The the param
- if (rows < 1) {
- throw new IllegalArgumentException(
- "The number of columns and rows in the grid must be at least 1");
- }
-
- // In case of no change
- if (this.rows == rows) {
- return;
- }
-
- // Checks for overlaps
- if (this.rows > rows) {
- for (final Iterator i = areas.iterator(); i.hasNext();) {
- final Area area = (Area) i.next();
- if (area.row2 >= rows) {
- throw new OutOfBoundsException(area);
- }
- }
- }
-
- this.rows = rows;
-
- requestRepaint();
- }
-
- /**
- * Get the number of rows in the grid.
- *
- * @return the number of rows in the grid.
- */
- public final int getRows() {
- return rows;
- }
-
- /**
- * Gets the current cursor x-position. The cursor position points the
- * position for the next component that is added without specifying its
- * coordinates (grid cell). When the cursor position is occupied, the next
- * component will be added to first free position after the cursor.
- *
- * @return the grid column the Cursor is on.
- */
- public int getCursorX() {
- return cursorX;
- }
-
- /**
- * Gets the current cursor y-position. The cursor position points the
- * position for the next component that is added without specifying its
- * coordinates (grid cell). When the cursor position is occupied, the next
- * component will be added to first free position after the cursor.
- *
- * @return the grid row the Cursor is on.
- */
- public int getCursorY() {
- return cursorY;
- }
-
- /* Documented in superclass */
- public void replaceComponent(Component oldComponent, Component newComponent) {
-
- // Gets the locations
- Area oldLocation = null;
- Area newLocation = null;
- for (final Iterator i = areas.iterator(); i.hasNext();) {
- final Area location = (Area) i.next();
- final Component component = location.getComponent();
- if (component == oldComponent) {
- oldLocation = location;
- }
- if (component == newComponent) {
- newLocation = location;
- }
- }
-
- if (oldLocation == null) {
- addComponent(newComponent);
- } else if (newLocation == null) {
- removeComponent(oldComponent);
- addComponent(newComponent, oldLocation.getColumn1(), oldLocation
- .getRow1(), oldLocation.getColumn2(), oldLocation.getRow2());
- } else {
- oldLocation.setComponent(newComponent);
- newLocation.setComponent(oldComponent);
- requestRepaint();
- }
- }
-
- /*
- * Removes all components from this container.
- *
- * @see com.itmill.toolkit.ui.ComponentContainer#removeAllComponents()
- */
- public void removeAllComponents() {
- super.removeAllComponents();
- componentToAlignment = new HashMap();
- cursorX = 0;
- cursorY = 0;
- }
-
- /*
- * (non-Javadoc)
- *
- * @see
- * com.itmill.toolkit.ui.Layout.AlignmentHandler#setComponentAlignment(com
- * .itmill.toolkit.ui.Component, int, int)
- */
- public void setComponentAlignment(Component childComponent,
- int horizontalAlignment, int verticalAlignment) {
- componentToAlignment.put(childComponent, new Integer(
- horizontalAlignment + verticalAlignment));
- requestRepaint();
- }
-
- /*
- * (non-Javadoc)
- *
- * @see com.itmill.toolkit.ui.Layout.SpacingHandler#setSpacing(boolean)
- */
- public void setSpacing(boolean enabled) {
- spacing = enabled;
- requestRepaint();
- }
-
- /*
- * (non-Javadoc)
- *
- * @see com.itmill.toolkit.ui.Layout.SpacingHandler#isSpacingEnabled()
- */
- public boolean isSpacingEnabled() {
- return spacing;
- }
-
- /**
- * Inserts an empty row at the chosen position in the grid.
- *
- * @param row
- * Number of the row the new row will be inserted before
- */
- public void insertRow(int row) {
- if (row > rows) {
- throw new IllegalArgumentException("Cannot insert row at " + row
- + " in a gridlayout with height " + rows);
- }
-
- for (Iterator i = areas.iterator(); i.hasNext();) {
- Area existingArea = (Area) i.next();
- // Areas ending below the row needs to be moved down or stretched
- if (existingArea.row2 >= row) {
- existingArea.row2++;
-
- // Stretch areas that span over the selected row
- if (existingArea.row1 >= row) {
- existingArea.row1++;
- }
-
- }
- }
-
- if (cursorY >= row) {
- cursorY++;
- }
-
- setRows(rows + 1);
- structuralChange = true;
- requestRepaint();
- }
-
- /**
- * Removes row and all components in the row. Components which span over
- * several rows are removed if the selected row is the component's first
- * row.
- *
- * @param row
- * The row number to remove
- */
- public void removeRow(int row) {
- if (row >= rows) {
- throw new IllegalArgumentException("Cannot delete row " + row
- + " from a gridlayout with height " + rows);
- }
-
- // Remove all components in row
- for (int col = 0; col < getColumns(); col++) {
- removeComponent(col, row);
- }
-
- // Shrink or remove areas in the selected row
- for (Iterator i = areas.iterator(); i.hasNext();) {
- Area existingArea = (Area) i.next();
- if (existingArea.row2 >= row) {
- existingArea.row2--;
-
- if (existingArea.row1 > row) {
- existingArea.row1--;
- }
- }
- }
-
- setRows(rows - 1);
- if (cursorY > row) {
- cursorY--;
- }
-
- structuralChange = true;
- requestRepaint();
-
- }
-
- }
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