/**
* Causes an {@link SmallStepNodeComponent#update() on all
* nodes that have changed.<br>
* <br>
* When all updates are done relayouts the View.
*
* @see #relayout()
*/
@Override
protected void nodesChanged(TreeModelEvent event) {
boolean relayout = false;
Object[] children = event.getChildren();
if (children == null) {
// if the children are null and the path only contains one element
// this element is the root node.
if (event.getPath().length == 1) {
SmallStepProofNode proofNode = (SmallStepProofNode) event.getPath()[0];
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) proofNode.getUserObject();
if (nodeComponent != null) {
nodeComponent.update();
relayout = true;
}
}
} else {
for (int i = 0; i < children.length; i++) {
if (children[i] instanceof ProofNode) {
SmallStepProofNode proofNode = (SmallStepProofNode) children[i];
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) proofNode.getUserObject();
if (nodeComponent != null) {
nodeComponent.update();
relayout = true;
}
}
}
}
if (relayout) {
relayout();
}
}
/**
* Returns the first child of the given node.<br>
* <br>
* If the node has no children, <i>null</i> is returned.
*
* @param node
* @return
*/
private SmallStepProofNode getFirstChild(SmallStepProofNode node) {
try {
return node.getFirstChild();
} catch (Exception e) {
// nothing
}
return null;
}
/**
* Removes all userobjects from the nodes that will be removed by the {@link SmallStepProofModel}
* later.
*/
@Override
protected void nodesRemoved(TreeModelEvent event) {
Object[] children = event.getChildren();
if (children == null) {
return;
}
for (int i = 0; i < children.length; i++) {
if (children[i] instanceof ProofNode) {
SmallStepProofNode proofNode = (SmallStepProofNode) children[i];
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) proofNode.getUserObject();
if (nodeComponent != null) {
remove(nodeComponent);
proofNode.setUserObject(null);
}
}
}
}
/**
* If <code>advanced</code> is <code>true</code>, the small step component will display only axiom
* rules in the rule menu, otherwise, in beginner mode, meta rules will also be displayed.
*
* @param pAdvanced <code>true</code> to display only axiom rules.
* @see #isAdvanced()
*/
void setAdvanced(boolean pAdvanced) {
// check if we have a new setting
if (this.advanced != pAdvanced) {
// remember the new setting
this.advanced = pAdvanced;
// make sure all nodes have valid user objects
checkForUserObject((SmallStepProofNode) this.proofModel.getRoot());
// update all active nodes
Enumeration<ProofNode> enumeration = this.proofModel.getRoot().postorderEnumeration();
while (enumeration.hasMoreElements()) {
// tell the component belonging to this node, that we have a new advanced state
SmallStepProofNode node = (SmallStepProofNode) enumeration.nextElement();
SmallStepNodeComponent component = (SmallStepNodeComponent) node.getUserObject();
component.setAdvanced(pAdvanced);
}
}
}
/**
* Traverses the ProofTree recursivly and checks the size of the expression for every node.
*
* @param node When calling this method: the rootNode of the tree.
*/
void checkExpressionSize(SmallStepProofNode node) {
if (node == null) {
return;
}
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) node.getUserObject();
nodeComponent.checkNeededExpressionSize(this.availableWidth - this.border);
// proceed with the next child
checkExpressionSize(getFirstChild(node));
}
/**
* Traverses the ProofTree recursivly and informing every node for the maximum size of the rule
* combo on the left-hand-side.
*
* @param node When calling this method: the rootNode of the tree.
* @param maxRuleWidth The maximum Width of the rules.
*/
void updateMaxRuleWidth(SmallStepProofNode node, int maxRuleWidth) {
if (node == null) {
return;
}
// inform the node of the max rule width
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) node.getUserObject();
nodeComponent.setMaxRuleWidth(maxRuleWidth);
// proceed with the next child node
updateMaxRuleWidth(getFirstChild(node), maxRuleWidth);
}
/**
* Traversing the ProofTree recursivly and adds a SmallStepNodeComponent where none is.<br>
* <br>
* Usualy only at newly added nodes the SmallStepNodeComponent is missing.
*
* @param node When calling this method: the rootNode of the tree.
*/
void checkForUserObject(SmallStepProofNode node) {
if (node == null) {
return;
}
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) node.getUserObject();
if (nodeComponent == null) {
// create the noded that has not been there yet
nodeComponent =
new SmallStepNodeComponent(
node, this.model, this.translator, this.spacing, this.advanced);
// add the needed listener
nodeComponent.addSmallStepNodeListener(
new SmallStepNodeListener() {
public void nodeChanged(SmallStepNodeComponent pNode) {
SmallStepComponent.this.relayout();
}
public void repaintAll() {
SmallStepComponent.this.repaint();
}
public void requestJumpToNode(ProofNode pNode) {
SmallStepComponent.this.setJumpNode(pNode);
}
});
nodeComponent.update();
// save it to the node
node.setUserObject(nodeComponent);
// and add the SmallStepNodeComponent to the gui
add(nodeComponent);
}
checkForUserObject(getFirstChild(node));
}
/**
* Causes all userobject from all nodes to reset the layout.<br>
* <br>
* Resetting means that every {@link PrettyStringRenderer} and {@link EnvironmentRenderer}
* recalculates their needed font sizes.
*/
private void resetUserObject(SmallStepProofNode node) {
if (node == null) {
return;
}
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) node.getUserObject();
if (nodeComponent == null) {
return;
}
nodeComponent.reset();
resetUserObject(getFirstChild(node));
}
/**
* Traverses the ProofTree recursivly and checks the needed size for the rule combo on the
* left-hand-side.<br>
* <br>
* The <i>currentWidth</i> is the current maximum width that has been evaluated. When calling this
* function this should be somthing small. Just set it to <b>0</b>.
*
* @param node When calling this method: the rootNode of the tree.
* @param pCurrentWidth Used internaly. Should be set to <b>0</b>.
* @return
*/
int checkMaxRuleWidth(SmallStepProofNode node, int pCurrentWidth) {
int currentWidth = pCurrentWidth;
if (node == null) {
return currentWidth;
}
// get the size of the current node
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) node.getUserObject();
int nodeWidth = nodeComponent.getMinRuleSize().width;
// only the maximum width is of interest
currentWidth = Math.max(currentWidth, nodeWidth);
// return the recursive result of the next node
return checkMaxRuleWidth(getFirstChild(node), currentWidth);
}
/**
* Iterates through the entire tree an places every node.<br>
* <br>
* There are some things to take care of, when the nodes get placed:<br>
* <br>
* The expression and the rules of the parent node are in one row so when the nodes get placed the
* actualHeight of each node must be the maximum of both. They are placed together in on step. So
* the rules of each node are placed together with the expression of its child node, if there is
* one.<br>
* If there is no parent node (that would be the first node, the root node), only the expression
* needs to get places.<br>
* If the node has no child (that would be the last node in the tree), the rules must be placed
* directly because there is no child node that would place them.
*
* @param node The rootNode
* @param pX The horizontal start position
* @param pY Ther vertical start position
* @return The size needed to show all the nodes.
*/
Dimension placeNode(SmallStepProofNode pNode, int pX, int pY) {
int x = pX;
int y = pY;
this.actualPageSpaceCounter = y;
SmallStepProofNode node = pNode;
Dimension size = new Dimension(0, 0);
// save the space the next node will be moved down
int movedDown = 0;
int lastNodeHeight = this.actualPageSpaceCounter;
while (node != null) {
SmallStepNodeComponent nodeComponent = (SmallStepNodeComponent) node.getUserObject();
// set the origin of this node
nodeComponent.setOrigion(new Point(x, y));
// if the node has no parent node it appears to be the rootNode
//
// the expression of the rootNode can be placed without checking anything
if (node.getParent() == null) {
nodeComponent.placeExpression();
// move the positioning
y += nodeComponent.getRuleTop();
this.actualPageSpaceCounter = y;
// evaluate the new dimensions
size.height = y;
} else {
// evaluate the max size of this nodes expression and the parent
// nodes rules
SmallStepProofNode parentNode = node.getParent();
SmallStepNodeComponent parentNodeComponent =
(SmallStepNodeComponent) parentNode.getUserObject();
Dimension expSize = nodeComponent.getExpressionSize();
Dimension ruleSize = parentNodeComponent.getRuleSize();
int maxHeight = Math.max(expSize.height, ruleSize.height);
// provide printing
// if the actualPageSpaceCounter has not enough space for the next node perform a pagebrak
if (this.actualPageSpaceCounter + maxHeight + lastNodeHeight > this.availableHeight) {
{
// save the space the node is moved down
movedDown = (this.availableHeight - this.actualPageSpaceCounter) / 2; // Wäää?
// move the next node down
y += movedDown;
// restart the actualPageSpaceCounter
this.actualPageSpaceCounter = -movedDown; // Wäää?
// inform both component about the actual height they should use to
// place them
parentNodeComponent.setActualRuleHeight(maxHeight);
nodeComponent.setActualExpressionHeight(maxHeight);
// let both components place theire elements
parentNodeComponent.placeRules();
nodeComponent.placeExpression();
// this finishes the parentNode so it can be placed
parentNodeComponent.setBounds();
// the additional height come from the actual node
y += nodeComponent.getRuleTop();
this.actualPageSpaceCounter += nodeComponent.getRuleTop();
// System.out.println(maxHeight+" - "+nodeComponent.getRuleTop());
// evaluate the new dimensions
size.height = y;
// the actual width of the entire component can now be checked
// on the finshed node. the parent node
size.width = Math.max(size.width, x + parentNodeComponent.getSize().width);
}
} else {
// inform both component about the actual height they should use to
// place them
parentNodeComponent.setActualRuleHeight(maxHeight);
nodeComponent.setActualExpressionHeight(maxHeight);
// let both components place theire elements
// the movedDown saves the information how far the the parent-Rules must be moved down...
parentNodeComponent.placeRules(movedDown);
nodeComponent.placeExpression();
// this finishes the parentNode so it can be placed
parentNodeComponent.setBounds(movedDown);
movedDown = 0;
// the additional height come from the actual node
y += nodeComponent.getRuleTop();
this.actualPageSpaceCounter += nodeComponent.getRuleTop();
// System.out.println(maxHeight+" - "+nodeComponent.getRuleTop());
// evaluate the new dimensions
size.height = y;
// the actual width of the entire component can now be checked
// on the finshed node. the parent node
size.width = Math.max(size.width, x + parentNodeComponent.getSize().width);
}
lastNodeHeight = maxHeight;
// tmpPaper += maxHeight;
}
// if the node has no children the rules need to get
// placed here with the expression
if (getFirstChild(node) == null) {
if (this.model.isFinished()) {
nodeComponent.hideRules();
nodeComponent.setBounds();
size.width = Math.max(size.width, x + nodeComponent.getSize().width);
} else {
// the rules can savely be positioned
nodeComponent.placeRules();
// and the node itself can be placed
nodeComponent.setBounds();
// evaluate the new dimension
size.height += nodeComponent.getActualRuleHeight();
// the actual width of the entire component can now be checked
// on the finshed node.
size.width = Math.max(size.width, x + nodeComponent.getSize().width);
}
return size;
}
node = node.getFirstChild();
}
return size;
}