public static void makeGrid( Container parent, int rows, int cols, int initialX, int initialY, int xPad, int yPad) { SpringLayout layout; try { layout = (SpringLayout) parent.getLayout(); } catch (ClassCastException exc) { System.err.println("The first argument to makeGrid must use SpringLayout."); return; } Spring xPadSpring = Spring.constant(xPad); Spring yPadSpring = Spring.constant(yPad); Spring initialXSpring = Spring.constant(initialX); Spring initialYSpring = Spring.constant(initialY); int max = rows * cols; Spring maxWidthSpring = layout.getConstraints(parent.getComponent(0)).getWidth(); Spring maxHeightSpring = layout.getConstraints(parent.getComponent(0)).getWidth(); for (int i = 1; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); maxWidthSpring = Spring.max(maxWidthSpring, cons.getWidth()); maxHeightSpring = Spring.max(maxHeightSpring, cons.getHeight()); } for (int i = 0; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); cons.setWidth(maxWidthSpring); cons.setHeight(maxHeightSpring); } SpringLayout.Constraints lastCons = null; SpringLayout.Constraints lastRowCons = null; for (int i = 0; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); if (i % cols == 0) { lastRowCons = lastCons; cons.setX(initialXSpring); } else { cons.setX(Spring.sum(lastCons.getConstraint(SpringLayout.EAST), xPadSpring)); } if (i / cols == 0) { cons.setY(initialYSpring); } else { cons.setY(Spring.sum(lastRowCons.getConstraint(SpringLayout.SOUTH), yPadSpring)); } lastCons = cons; } SpringLayout.Constraints pCons = layout.getConstraints(parent); pCons.setConstraint( SpringLayout.SOUTH, Spring.sum(Spring.constant(yPad), lastCons.getConstraint(SpringLayout.SOUTH))); pCons.setConstraint( SpringLayout.EAST, Spring.sum(Spring.constant(xPad), lastCons.getConstraint(SpringLayout.EAST))); }
/** * Aligns the first <code>rows</code> * <code>cols</code> components of <code>parent</code> in a * grid. Each component in a column is as wide as the maximum preferred width of the components in * that column; height is similarly determined for each row. The parent is made just big enough to * fit them all. * * @param rows number of rows * @param cols number of columns * @param initialX x location to start the grid at * @param initialY y location to start the grid at * @param xPad x padding between cells * @param yPad y padding between cells */ public static void makeCompactGrid( Container parent, int rows, int cols, int initialX, int initialY, int xPad, int yPad) { SpringLayout layout; try { layout = (SpringLayout) parent.getLayout(); } catch (ClassCastException exc) { System.err.println("The first argument to makeCompactGrid must use SpringLayout."); return; } // Align all cells in each column and make them the same width. Spring x = Spring.constant(initialX); for (int c = 0; c < cols; c++) { Spring width = Spring.constant(0); for (int r = 0; r < rows; r++) { width = Spring.max(width, SpringUtilities.getConstraintsForCell(r, c, parent, cols).getWidth()); } for (int r = 0; r < rows; r++) { SpringLayout.Constraints constraints = SpringUtilities.getConstraintsForCell(r, c, parent, cols); constraints.setX(x); constraints.setWidth(width); } x = Spring.sum(x, Spring.sum(width, Spring.constant(xPad))); } // Align all cells in each row and make them the same height. Spring y = Spring.constant(initialY); for (int r = 0; r < rows; r++) { Spring height = Spring.constant(0); for (int c = 0; c < cols; c++) { height = Spring.max( height, SpringUtilities.getConstraintsForCell(r, c, parent, cols).getHeight()); } for (int c = 0; c < cols; c++) { SpringLayout.Constraints constraints = SpringUtilities.getConstraintsForCell(r, c, parent, cols); constraints.setY(y); constraints.setHeight(height); } y = Spring.sum(y, Spring.sum(height, Spring.constant(yPad))); } // Set the parent's size. SpringLayout.Constraints pCons = layout.getConstraints(parent); pCons.setConstraint(SpringLayout.SOUTH, y); pCons.setConstraint(SpringLayout.EAST, x); }
/** * Aligns the height of all cells in a row. * * @param layout * @param grid * @param cols * @param rows * @return */ private Spring alignRows(SpringLayout layout, List<List<Component>> grid, int cols, int rows) { // Align all cells in each row and make them the same height. Spring y = Spring.constant(this.topMargin); int[] rowSpacing = new int[rows]; Arrays.fill(rowSpacing, this.yPad); // no space above filler line rowSpacing[rows - 2] = 0; rowSpacing[rows - 1] = this.bottomMargin; for (int r = 0; r < rows; r++) { Spring height = Spring.constant(0); for (int c = 0; c < cols; c++) if (grid.get(r).get(c) != null) height = Spring.max(height, layout.getConstraints(grid.get(r).get(c)).getHeight()); for (int c = 0; c < cols; c++) if (grid.get(r).get(c) != null) { SpringLayout.Constraints constraints = layout.getConstraints(grid.get(r).get(c)); constraints.setY(y); constraints.setHeight(height); } y = Spring.sum(y, Spring.sum(height, Spring.constant(rowSpacing[r]))); } return y; }
/** * Aligns the first <code>rows</code> * <code>cols</code> components of <code>parent</code> in a * grid. Each component is as big as the maximum preferred width and height of the components. The * parent is made just big enough to fit them all. * * @param rows number of rows * @param cols number of columns * @param initialX x location to start the grid at * @param initialY y location to start the grid at * @param xPad x padding between cells * @param yPad y padding between cells */ public static void makeGrid( Container parent, int rows, int cols, int initialX, int initialY, int xPad, int yPad) { SpringLayout layout; try { layout = (SpringLayout) parent.getLayout(); } catch (ClassCastException exc) { System.err.println("The first argument to makeGrid must use SpringLayout."); return; } Spring xPadSpring = Spring.constant(xPad); Spring yPadSpring = Spring.constant(yPad); Spring initialXSpring = Spring.constant(initialX); Spring initialYSpring = Spring.constant(initialY); int max = rows * cols; // Calculate Springs that are the max of the width/height so that all // cells have the same size. Spring maxWidthSpring = layout.getConstraints(parent.getComponent(0)).getWidth(); Spring maxHeightSpring = layout.getConstraints(parent.getComponent(0)).getWidth(); for (int i = 1; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); maxWidthSpring = Spring.max(maxWidthSpring, cons.getWidth()); maxHeightSpring = Spring.max(maxHeightSpring, cons.getHeight()); } // Apply the new width/height Spring. This forces all the // components to have the same size. for (int i = 0; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); cons.setWidth(maxWidthSpring); cons.setHeight(maxHeightSpring); } // Then adjust the x/y constraints of all the cells so that they // are aligned in a grid. SpringLayout.Constraints lastCons = null; SpringLayout.Constraints lastRowCons = null; for (int i = 0; i < max; i++) { SpringLayout.Constraints cons = layout.getConstraints(parent.getComponent(i)); if (i % cols == 0) { // start of new row lastRowCons = lastCons; cons.setX(initialXSpring); } else { // x position depends on previous component cons.setX(Spring.sum(lastCons.getConstraint(SpringLayout.EAST), xPadSpring)); } if (i / cols == 0) { // first row cons.setY(initialYSpring); } else { // y position depends on previous row cons.setY(Spring.sum(lastRowCons.getConstraint(SpringLayout.SOUTH), yPadSpring)); } lastCons = cons; } // Set the parent's size. SpringLayout.Constraints pCons = layout.getConstraints(parent); pCons.setConstraint( SpringLayout.SOUTH, Spring.sum(Spring.constant(yPad), lastCons.getConstraint(SpringLayout.SOUTH))); pCons.setConstraint( SpringLayout.EAST, Spring.sum(Spring.constant(xPad), lastCons.getConstraint(SpringLayout.EAST))); }