i have a Java-Class that extends the AreaChart. There i would like to implement a method that makes more or less something like this:
public void addNewColorToData(xCoordinate, yCoordinate, redColor, greenColor, blueColor);
-> The Function should get the parameters of the Data for the xCoordinate, yCoordinate and then for the RGB Value of the representes Line.
Is it possible to create with Inline-Styles a new Color for this ?
Here you can see a Sample. There are a lot of Color-Fills for the Area Chart!
Is it possible to add there some new colors?
I need to add a Inline Style stuff like this in CSS:
.default-color0.chart-series-area-fill { -fx-fill: #007Fc350; }
Thank you for your help
Based on this answer, to create an inline style based on r,g,b parameters (given these are integers from 0 to 255) you just need to override the CHART_COLOR_1 (up to CHART_COLOR_8) value to modify the line color and CHART_COLOR_1_TRANS_20 (up to CHART_COLOR_8_TRANS_20) to modify the area color:
private AreaChart<String, Number> areaChart;
private void changeColor(int redColor, int greenColor, int blueColor, double opacity){
/* int redColor=0, greenColor=127, blueColor=195;
double opacity=0.4;
*/
areaChart.setStyle("CHART_COLOR_1: rgb("+redColor+","+greenColor+","+blueColor+");" +
"CHART_COLOR_1_TRANS_20: rgba("+redColor+","+greenColor+","+blueColor+");");
}
EDIT
I'm adding this short MVCE for the sake of clarity:
#Override
public void start(Stage primaryStage) {
AreaChart<String, Number> areaChart=new AreaChart<>(new CategoryAxis(),new NumberAxis());
ObservableList<XYChart.Data<String,Integer>> xyList
= FXCollections.observableArrayList(
new XYChart.Data<>("P1", 30),
new XYChart.Data<>("P2", 40),
new XYChart.Data<>("P3", 30));
XYChart.Series series = new XYChart.Series(xyList);
areaChart.getData().addAll(series);
Button button = new Button("Change style");
button.setOnAction(e->{
int redColor=0, greenColor=127, blueColor=195;
double opacity=0.3;
areaChart.setStyle("CHART_COLOR_1: rgb("+redColor+","+greenColor+","+blueColor+"); "
+ "CHART_COLOR_1_TRANS_20: rgba("+redColor+","+greenColor+","+blueColor+","+opacity+");");
});
VBox root = new VBox(5, button, areaChart);
Scene scene = new Scene(root, 400, 300);
primaryStage.setScene(scene);
primaryStage.show();
}
This would be the result:
Related
I have a FlowPane with equally-sized rectangular children and I have this problem with the space at the right end of the flowpane, when the space is not enough to fit another column of children, I want it to be equally divided between the other columns.
An example of what I want to achieve is how the file explorer in windows behaves, see the gif bellow for reference
The default FlowPane behaviour doesn't look like this, it leaves the remaining width that can't fit a new child at the end of the region, as shown in the gif bellow
And I failed to find any API or documentation to help me achieve my goal, I thought of adding a listener on the width property and adjusting the hGap property accordingly, something like
[ flowPaneWidth - (sum of the widths of the children in one column) ] / (column count - 1)
But again, I have no idea how to figure out the column count, so any help would be appreciated.
Here is a MRE if anyone wants to try their ideas :
public class FPAutoSpace extends Application {
#Override
public void start(Stage ps) throws Exception {
FlowPane root = new FlowPane(10, 10);
root.setPadding(new Insets(10));
for(int i = 0; i < 20; i++) {
root.getChildren().add(new Rectangle(100, 100, Color.GRAY));
}
ps.setScene(new Scene(root, 600, 600));
ps.show();
}
}
After a bit of thinking, I tried to implement the idea mentioned in the question :
adding a listener on the width property and adjusting the hGap property accordingly
but I added the listener on the needsLayout property instead, as follows :
public class FPAutoSpace extends Application {
private double nodeWidth = 100;
#Override
public void start(Stage ps) throws Exception {
FlowPane root = new FlowPane();
root.setVgap(10);
for (int i = 0; i < 20; i++) {
root.getChildren().add(new Rectangle(nodeWidth, nodeWidth, Color.GRAY));
}
root.needsLayoutProperty().addListener((obs, ov, nv) -> {
int colCount = (int) (root.getWidth() / nodeWidth);
//added 4 pixels because it gets glitchy otherwise
double occupiedWidth = nodeWidth * colCount + 4;
double hGap = (root.getWidth() - occupiedWidth) / (colCount - 1);
root.setHgap(hGap);
});
StackPane preRoot = new StackPane(root);
preRoot.setPadding(new Insets(10));
preRoot.setAlignment(Pos.TOP_LEFT);
ps.setScene(new Scene(preRoot, 600, 600));
ps.show();
}
}
Not sure how this will hold up in a multi-hundred node FlowPane but it worked for the MRE
Let me know if you think there are better ways to do it.
I have a simple HBOX control which uses USE_COMPUTED_SIZE in Pref-Height, hence the size is all calculated and adjusted by the controls inside, which are a couple VBOX.
The issue comes when I try to add a new Pane as a children to the HBOX and draw a vertical line from top to bottom of the HBOX, so I write my line:
int startX = 5;
int startY = 0;
int endX = 5;
Line line = new Line(startX,startY,endX,hbox.getHeight());
Here, I need the hbox.getHeight(), but surprise: it is =-1, because it is using USE_COMPUTED_SIZE. So, how can I get the real (computed) value of hbox.getHeight()?
Not tested, but I think you can do something like:
public class HBoxWithLine extends HBox {
// Example of configurable property:
private final DoubleProperty lineOffset = new SimpleDoubleProperty(5);
public DoubleProperty lineOffsetProperty() {
return lineOffset ;
}
public final double getLineOffset() {
return lineOffsetProperty().get();
}
public final void setLineOffset(double lineOffset) {
lineOffsetProperty().set(lineOffset);
}
private final Line line = new Line();
public HBoxWithLine() {
getChildren().add(line);
// request layout when offset is invalidated:
lineOffset.addListener(obs -> requestLayout());
}
#Override
protected void layoutChildren() {
line.setStartX(getLineOffset());
line.setEndX(getLineOffset());
line.setStartY(0);
line.setEndY(getHeight());
super.layoutChildren();
}
}
Now you can just create a HBoxWithLine and add (additional) child nodes to it, set it's pref width and height to either fixed values, or Region.USE_COMPUTED_SIZE, etc., and it should just work.
I'm new at javafx but I'm writing an app and I want my "to" value to change depending on which option is chosen in the choicebox but my current code always keeps it at 0..help? I want to be able to change the to depending on state
public void start(Stage primaryStage) {
double to=0;
primaryStage.setTitle("ShCal");
GridPane pane = new GridPane();
` pane.setAlignment(Pos.CENTER);
pane.setHgap(10);
pane.setVgap(10);
pane.setPadding(new Insets(25, 25, 25, 25));
Scene scene = new Scene(pane, 300, 275);
//button
Button button=new Button("to");
pane.add(button, 0, 3);
//Pick state
Label State=new Label("State");
pane.add(State,0,0);
//choicebox
ChoiceBox<String> choicesBox=new ChoiceBox<>();
choicesBox.getItems().addAll("NJ","NY");
pane.add(choicesBox,1,0);
//set default
choicesBox.setValue(null);
button.setOnAction(e->getChoice(choicesBox,to));
primaryStage.setScene(scene);
primaryStage.show();
}
private double getChoice(ChoiceBox<String> choicesBox, double tx) {
String state=choicesBox.getValue();
System.out.print(tx);
if(state=="NJ")
{
tx=10/100;
}
System.out.print(state);
return tx;
}
public static void main(String[] args) {
launch(args);
}
}
That is because your to value is of the primitive type double, defined in the scope of your start method. The method getChoice returns the new value, but you are not updating it.
Here are two approaches that you can try:
Define to as member:
private double to = 0;
private double getChoice(ChoiceBox<String> choicesBox) {
String state=choicesBox.getValue();
if(state=="NJ") {
tx=10/100;
}
}
However I personally would prefer a solution that is more inline with JavaFX: Define the to variable as member property:
private DoubleProperty to = new SimpleDoubleProperty(0);
private double getChoice(ChoiceBox<String> choicesBox) {
String state=choicesBox.getValue();
if(state=="NJ") {
tx.setValue(10/100);
}
}
Doing it this way you can then for example have a label displaying the value without the hassle of requiring to update it on each change:
Label lbl = new Label();
lbl.textProperty().bind(to.asString());
I have a Class that extends the CustomMenuItem. This MenuItems are added to a ContextMenu. Now i need to get the X-Coordinates from the right side of the CustomMenuItem.
The Problem is, that I have no idea how I can get the Coordinates.
The CustMenuItem has no function for getting the Coordinates like getX() or getY().
So how can I solve this problem?
This thing I would like to get:
Here we can see a Sample for a Context Menu (red lines). In the Context Menu are a lot of different CustomMenuItems implemented. Now I would like to get the right top corner Coordinate of the CustomMenuItem.
Thank you for your very nice help.
Before dealing with menu items, let's start saying that a ContextMenu is a popup window, so it has Windowproperties. You can ask for (x,y) left, top origin, and for (w,h).
But you have to take into account the effects, since by default it includes a dropshadow. And when it does, there's an extra space added of 24x24 pixels to the right and bottom.
.context-menu {
-fx-effect: dropshadow( gaussian , rgba(0,0,0,0.2) , 12, 0.0 , 0 , 8 );
}
Since this default dropshadow has a radius of 12px, and Y-offset to the bottom of 8px, the right and bottom coordinates of the context menu, including the 24x24 area, are given by:
X=t.getX()+cm.getWidth()-12-24;
Y=t.getY()+cm.getHeight()-(12-8)-24;
where t could be a MouseEvent relative to the scene, and values are hardcoded for simplicity.
Let's see this over an example. Since you don't say how your custom menu items are implemented, I'll just create a simple Menu Item with graphic and text:
private final Label labX = new Label("X: ");
private final Label labY = new Label("Y: ");
#Override
public void start(Stage primaryStage) {
final ContextMenu cm = new ContextMenu();
MenuItem cmItem1 = createMenuItem("mNext", "Next Long Option",t->System.out.println("next"));
MenuItem cmItem2 = createMenuItem("mBack", "Go Back", t->System.out.println("back"));
SeparatorMenuItem sm = new SeparatorMenuItem();
cm.getItems().addAll(cmItem1,cmItem2);
VBox root = new VBox(10,labX,labY);
Scene scene = new Scene(root, 300, 250);
scene.setOnMouseClicked(t->{
if(t.getButton()==MouseButton.SECONDARY || t.isControlDown()){
// t.getX,Y->scene based coordinates
cm.show(scene.getWindow(),t.getX()+scene.getWindow().getX()+scene.getX(),
t.getY()+scene.getWindow().getY()+scene.getY());
labX.setText("Right X: "+(t.getX()+cm.getWidth()-12-24));
labY.setText("Bottom Y: "+(t.getY()+cm.getHeight()-4-24));
}
});
scene.getStylesheets().add(getClass().getResource("root.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.show();
primaryStage.setTitle("Scene: "+scene.getWidth()+"x"+scene.getHeight());
}
private MenuItem createMenuItem(String symbol, String text, EventHandler<ActionEvent> t){
MenuItem m=new MenuItem(text);
StackPane g=new StackPane();
g.setPrefSize(24, 24);
g.setId(symbol);
m.setGraphic(g);
m.setOnAction(t);
return m;
}
If you remove the effect:
.context-menu {
-fx-effect: null;
}
then these coordinates are:
X=t.getX()+cm.getWidth();
Y=t.getY()+cm.getHeight();
Now that we have the window, let's go into the items.
MenuItem skin is derived from a (private) ContextMenuContent.MenuItemContainer class, which is a Region where the graphic and text are layed out.
When the context menu is built, all the items are wrapped in a VBox, and all are equally resized, as you can see if you set the border for the item:
.menu-item {
-fx-border-color: black;
-fx-border-width: 1;
}
This is how it looks like:
So the X coordinates of every item on the custom context menu are the same X from their parent (see above, with or without effect), minus 1 pixel of padding (by default).
Note that you could also go via private methods to get dimensions for the items:
ContextMenuContent cmc= (ContextMenuContent)cm.getSkin().getNode();
System.out.println("cmc: "+cmc.getItemsContainer().getBoundsInParent());
Though this is not recommended since private API can change in the future.
EDIT
By request, this is the same code removing lambdas and css.
private final Label labX = new Label("X: ");
private final Label labY = new Label("Y: ");
#Override
public void start(Stage primaryStage) {
final ContextMenu cm = new ContextMenu();
MenuItem cmItem1 = createMenuItem("mNext", "Next Long Option",action);
MenuItem cmItem2 = createMenuItem("mBack", "Go Back", action);
SeparatorMenuItem sm = new SeparatorMenuItem();
cm.getItems().addAll(cmItem1,cmItem2);
VBox root = new VBox(10,labX,labY);
Scene scene = new Scene(root, 300, 250);
scene.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent t) {
if(t.getButton()==MouseButton.SECONDARY || t.isControlDown()){
// t.getX,Y->scene based coordinates
cm.show(scene.getWindow(),t.getX()+scene.getWindow().getX()+scene.getX(),
t.getY()+scene.getWindow().getY()+scene.getY());
labX.setText("Right X: "+(t.getX()+cm.getWidth()-12-24));
labY.setText("Bottom Y: "+(t.getY()+cm.getHeight()-4-24));
}
}
});
primaryStage.setScene(scene);
primaryStage.show();
primaryStage.setTitle("Scene: "+scene.getWidth()+"x"+scene.getHeight());
}
private MenuItem createMenuItem(String symbol, String text, EventHandler<ActionEvent> t){
MenuItem m=new MenuItem(text);
StackPane g=new StackPane();
g.setPrefSize(24, 24);
g.setId(symbol);
SVGPath svg = new SVGPath();
svg.setContent("M0,5H2L4,8L8,0H10L5,10H3Z");
m.setGraphic(svg);
m.setOnAction(t);
return m;
}
private final EventHandler<ActionEvent> action = new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("action");
}
};
I have three problems:
I want to create resizable shapes with box bounding...
I also want to know how to get child seleted in a Pane.
I'm creating multiple shapes on a pane. I want to change some property of that shape say Fill.. How do i do it??
Thanx
Next example will answer your questions:
for (1) it uses binding, connecting pane size with rectangle size
for (2) it adds setOnMouseClick for each rectangle which stores clicked one in the lastOne field.
for (3) see code of setOnMouseClick() handler
public class RectangleGrid extends Application {
private Rectangle lastOne;
public void start(Stage stage) throws Exception {
Pane root = new Pane();
int grid_x = 7; //number of rows
int grid_y = 7; //number of columns
// this binding will find out which parameter is smaller: height or width
NumberBinding rectsAreaSize = Bindings.min(root.heightProperty(), root.widthProperty());
for (int x = 0; x < grid_x; x++) {
for (int y = 0; y < grid_y; y++) {
Rectangle rectangle = new Rectangle();
rectangle.setStroke(Color.WHITE);
rectangle.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent t) {
if (lastOne != null) {
lastOne.setFill(Color.BLACK);
}
// remembering clicks
lastOne = (Rectangle) t.getSource();
// updating fill
lastOne.setFill(Color.RED);
}
});
// here we position rects (this depends on pane size as well)
rectangle.xProperty().bind(rectsAreaSize.multiply(x).divide(grid_x));
rectangle.yProperty().bind(rectsAreaSize.multiply(y).divide(grid_y));
// here we bind rectangle size to pane size
rectangle.heightProperty().bind(rectsAreaSize.divide(grid_x));
rectangle.widthProperty().bind(rectangle.heightProperty());
root.getChildren().add(rectangle);
}
}
stage.setScene(new Scene(root, 500, 500));
stage.show();
}
public static void main(String[] args) { launch(); }
}