I want to create panel that fits window by width but has fixed height (using GXT 2.3.):
public void onModuleLoad() {
Viewport viewport = new Viewport ();
viewport.setEnableScroll(true);
viewport.setLayout(new FitLayout());
viewport.setAutoHeight(false);
viewport.setHeight(700);
ContentPanel cpanel = new ContentPanel();
cpanel.setHeight(700);
viewport.add(cpanel);
RootPanel.get().add(viewport);
But when I resize browser window, viewport height allways recalculated.
So how to make it fixed?
On solution would be to extend FitLayout to avoid to recompute the height on resize :
public class MyFitLayout extends FitLayout {
protected void setItemSize(Component item, Size size) {
if (item != null && item.isRendered()) {
size.width -= getSideMargins(item);
//size.height -= item.el().getMargins("tb");
setSize(item, size.width, size.height);
}
}
}
Related
I am trying to print svg pictures on my xamarin forms app.
I am using SkiaSharp.
I implemented a component using a Bindable property to get the byte[] of the svg and I draw it in the component.
public static readonly BindableProperty ImageProperty = BindableProperty.Create(nameof(Image), typeof(byte[]), typeof(SvgCanvas));
public byte[] Image
{
get => (byte[])GetValue(ImageProperty);
set
{
if (Image == value)
{
return;
}
SetValue(ImageProperty, value);
CanvasView.InvalidateSurface();
}
}
private void OnPainting(object sender, SKPaintSurfaceEventArgs args)
{
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
int width = args.Info.Width;
int height = args.Info.Height;
// clear the surface
canvas.Clear(SKColors.White);
// the page is not visible yet
if (Image == null)
{
return;
}
SKSvg svg = new SKSvg(new SKSize(width, height));
using (MemoryStream ms = new MemoryStream(Image))
{
svg.Load(ms);
}
// draw the svg
// canvas.DrawPicture(svg.Picture, ref matrix);
canvas.DrawPicture(svg.Picture);
}
It looks like the Picture is loaded but only a black square is displayed on my view...
My component is called like this in my page: (Picture is a byte[])
<controls:SvgCanvas Image="{Binding Picture}" />
Did somebody had the same issue? Maybe an encoding problem?
I am kind of lost..
Please go through the image below.
In the above image you can find that horizontal scrolling is not started.
Now visit the After Scroll image of the same contents...
Now in the second image you can see that horizontal scrolling is done ...
JFXPanel contents are scroll horizontally... Which was perfect...
Now the third image will describe the problem....
It is liitle bit stretched to see as it is maximized...
You can see that the JFXPanel contents have changed their original position...
Moreover the contents must start with X_DisplaceMent = 0.0 [X-Cordinate], which was done automatically in the first two images...
All the contents are nodes like [Rectangle,Line etc.. ], after that all are placed in Group node...
And this Group node is set in the ScrollPane through
js.setContent(Group node);
Each component is placed with given x,y cordiante value .. then how did this happen while doing the maximized ?
Please help me to find the root cause ...
Thanks in advance...
Here are some facts that cause the problem.
- Start Position of Scene : 0.0
- Start Position of Group in Scene : 49.5
- Width of the root : 364.5
- Start Position of Scene : 0.0
- Start Position of Group in Scene : 63.5
- Width of the root : 364.5
- Start Position of Scene : 0.0
- Start Position of Group in Scene : 83.5
- Width of the root : 364.5
Whenever we drag the window horizontally Group is moving in the scene... That should not happen... how to avoid this ...
Ok... Here is the MCVE.....
There is a Frame. which contain SplitPane having vertical split.
The SplitPane will show the contents of two JFxPanels.
Both fxpanels are having rectangle on same x cordinate but Y cordinate is different.
And both the fxPanels are horizontal scroll sync. Not bi-directional. When you scroll lower panel horizonatally, the upper panel will get scrolled due to horizontal sync.
Here is the code for fxPanel 1...
public class FxPanel1 extends JFXPanel
{
private ScrollPane scroll ;
public ScrollPane getJs() {
return scroll;
}
public void setJs(ScrollPane js) {
this.scroll = js;
}
private boolean initFX(JFXPanel fxPanel) {
Scene scene = createScene();
fxPanel.setScene(scene);
return true;
//craneAssignmentChartView.setFxPanel(fxPanel);
}
private Scene createScene() {
Group root = new Group();
Rectangle rect = new Rectangle(10.0, 20.0, 800, 40);
rect.setFill(javafx.scene.paint.Color.TRANSPARENT);
rect.setStroke(javafx.scene.paint.Color.RED);
AnchorPane anchor = new AnchorPane();
anchor.getChildren().add(rect);
GridPane grid = new GridPane();
grid.setHgap(0);
grid.setVgap(0);
grid.setPadding(new Insets(0, 0, 0, 0));
grid.add(anchor, 1, 0);
root.getChildren().add(grid);
ScrollPane scroll = new ScrollPane();
scroll.setHbarPolicy(ScrollBarPolicy.ALWAYS);
scroll.setVbarPolicy(ScrollBarPolicy.AS_NEEDED);
scroll.setContent(root);
setJs(scroll);
return new Scene(scroll, javafx.scene.paint.Color.WHITE);
}
private void createUI(final JFXPanel fxPanel)
{
Platform.runLater(new Runnable() {
#Override
public void run()
{
initFX(fxPanel);
}
});
}
public FxPanel1( JFXPanel fxPanel)
{
createUI(fxPanel);
}
}
Now the code for second fxPanel looks like ...
public class FxPanel2 extends JFXPanel
{
private ScrollPane scroll ;
public ScrollPane getJs() {
return scroll;
}
public void setJs(ScrollPane js) {
this.scroll = js;
}
private boolean initFX(JFXPanel fxPanel) {
Scene scene = createScene();
fxPanel.setScene(scene);
return true;
//craneAssignmentChartView.setFxPanel(fxPanel);
}
private Scene createScene() {
Group root = new Group();
Rectangle rect = new Rectangle(10.0, 180.0, 800, 40);
rect.setFill(javafx.scene.paint.Color.TRANSPARENT);
rect.setStroke(javafx.scene.paint.Color.RED);
AnchorPane anchor = new AnchorPane();
anchor.getChildren().add(rect);
GridPane grid = new GridPane();
grid.setHgap(0);
grid.setVgap(0);
grid.setPadding(new Insets(0, 0, 0, 0));
grid.add(anchor, 1, 0);
root.getChildren().add(grid);
ScrollPane scroll = new ScrollPane();
scroll.setHbarPolicy(ScrollBarPolicy.ALWAYS);
scroll.setVbarPolicy(ScrollBarPolicy.NEVER);
scroll.setContent(root);
setJs(scroll);
return new Scene(scroll, javafx.scene.paint.Color.WHITE);
}
private void createUI(final JFXPanel fxPanel)
{
Platform.runLater(new Runnable() {
#Override
public void run()
{
initFX(fxPanel);
}
});
}
public FxPanel2( JFXPanel fxPanel)
{
createUI(fxPanel);
}
}
The main class looks like ....
public class DemoToCheckUIAlignment extends JFrame
{
public static void main(String[] args)
{
final DemoToCheckUIAlignment demo = new DemoToCheckUIAlignment();
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
JFXPanel panel1 = new JFXPanel();
FxPanel1 fxObj1 = new FxPanel1(panel1);
JFXPanel panel2 = new JFXPanel();
FxPanel2 fxObj2 = new FxPanel2(panel2);
DemoToCheckUIAlignment frame = new DemoToCheckUIAlignment();
frame.setSize(800, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JSplitPane chartSplitPane = new JSplitPane();
chartSplitPane.setOrientation(JSplitPane.VERTICAL_SPLIT);
chartSplitPane.setDividerLocation(200);
chartSplitPane.setDividerSize(2);
chartSplitPane.setTopComponent(panel1);
chartSplitPane.setBottomComponent(panel2);
demo.provideScrollSyncBetweenFXPanels(fxObj1.getJs(), fxObj2.getJs());
frame.getContentPane().add(chartSplitPane);
//frame.getContentPane().add(panel2);
frame.setVisible(true);
}
});
}
public static void provideScrollSyncBetweenFXPanels(final ScrollPane upperSP, final ScrollPane lowerSP)
{
lowerSP.hvalueProperty().addListener(new ChangeListener<Number>()
{
public void changed(ObservableValue<? extends Number> ov,
Number old_val, Number new_val)
{
upperSP.hvalueProperty().set(new_val.doubleValue());
}
});
}
}
Now to check the problem follow the simple steps...
Ofcorse run the program...
Scroll the bottom Panel ....that is FxPanel2...
And maximized the window .... The x - position for the inner contents is changed now...
which does not happen with Swing....
Here are the screen shots where the problem reproduce for the attached MCVE....Please go through the images....
You may use setFitToWidth of the ScrollPane Object to match a particular dimension. For more details you may refer to the link http://docs.oracle.com/javafx/2/ui_controls/scrollpane.htm at down the page, Resizing Components in the Scroll Pane, you may find more on the solution
This question already has answers here:
Add fixed positioned Combobox inside FlowPane
(2 answers)
Closed 9 years ago.
I have a FlowPane with panels which will be used to display data in front of the user.
![enter image description here][1]
I added also scrollpane when the number of the panels is bigger than the visible area.
I also want to add filter which will sort the panels by type and will display only the appropriate. The red area will hold the ComboBox which will be the filter.
And as you can see the red are pushes down the FlowPane which will make a gap between the top component and the scroll when I make the area transparent.
Is there a way to use the z-index and place the red are in front of the FlowPane? Or some other solution?
This is the result that I would like to get:
![enter image description here][2]
Investigate this example based on your code in previous questions:
public class Demo extends Application {
#Override
public void start(Stage stage) throws Exception {
StackPane stackPane = new StackPane();
stackPane.setAlignment(Pos.TOP_LEFT);
stackPane.getChildren().addAll(infrastructurePane(), getFilterPane());
Scene scene = new Scene(stackPane);
stage.setScene(scene);
stage.show();
}
public Pane getFilterPane() {
ObservableList<String> options =
FXCollections.observableArrayList(
"Option 1", "Option 2", "Option 3");
ComboBox<String> combo = new ComboBox<String>(options);
HBox pane = new HBox();
pane.setPadding(new Insets(20));
pane.setStyle("-fx-background-color: rgba(255,0,85,0.4)");
pane.getChildren().add(combo);
pane.setMaxHeight(40);
// Optional
//pane.setEffect(new DropShadow(15, Color.RED));
return pane;
}
public ScrollPane infrastructurePane() {
final FlowPane flow = new FlowPane();
flow.setPadding(new Insets(5, 5, 5, 5));
flow.setVgap(5);
flow.setHgap(5);
flow.setAlignment(Pos.CENTER);
final ScrollPane scroll = new ScrollPane();
scroll.setHbarPolicy(ScrollPane.ScrollBarPolicy.AS_NEEDED); // Horizontal scroll bar
scroll.setVbarPolicy(ScrollPane.ScrollBarPolicy.AS_NEEDED); // Vertical scroll bar
scroll.setFitToHeight(true);
scroll.setFitToWidth(true);
scroll.setContent(flow);
// scroll.viewportBoundsProperty().addListener(new ChangeListener<Bounds>() {
// #Override
// public void changed(ObservableValue<? extends Bounds> ov, Bounds oldBounds, Bounds bounds) {
// flow.setPrefWidth(bounds.getWidth());
// flow.setPrefHeight(bounds.getHeight());
// }
// });
//flow.setPrefWrapLength(170); // preferred width allows for two columns
flow.setStyle("-fx-background-color: yellow;");
for (int i = 0; i < 28; i++) {
flow.getChildren().add(generateRectangle());
}
String cssURL = "/com/dx57dc/css/ButtonsDemo.css";
String css = this.getClass().getResource(cssURL).toExternalForm();
flow.getStylesheets().add(css);
return scroll;
}
public Rectangle generateRectangle() {
final Rectangle rect2 = new Rectangle(10, 10, 10, 10);
rect2.setId("app");
rect2.setArcHeight(8);
rect2.setArcWidth(8);
//rect2.setX(10);
//rect2.setY(160);
rect2.setStrokeWidth(1);
rect2.setStroke(Color.WHITE);
rect2.setWidth(220);
rect2.setHeight(180);
rect2.setOnMouseClicked(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
rect2.setFill(Color.ALICEBLUE);
}
});
return rect2;
}
public static void main(String[] args) {
launch(args);
}
}
EDIT:
As per comment, here is the combo without pane. Since there is no pane the mouse events will not be blocked. Replace only this method with above one:
public ComboBox getFilterPane() {
ObservableList<String> options =
FXCollections.observableArrayList(
"Option 1", "Option 2", "Option 3");
ComboBox<String> combo = new ComboBox<String>(options);
combo.setTranslateX(10);
combo.setTranslateY(10);
return combo;
}
if you're using JavaFX 8, you can try a Notification Pane from ControlsFX project
It looks like:
It's pretty unclear to get which behaviour you don't want and which one you want.
This sentence "And as you can see the red are pushes down the FlowPane which will make a gap between the top component and the scroll when I make the area transparent." is particularly hard to understand.
But if you just want to "use the z-index and place the red are in front of the FlowPane?", maybe all you're asking for is just a StackPane ?
StackPane lays out its children in a back-to-front stack.
The z-order of the children is defined by the order of the children
list with the 0th child being the bottom and last child on top. If a
border and/or padding have been set, the children will be layed out
within those insets.
http://docs.oracle.com/javafx/2/api/javafx/scene/layout/StackPane.html
If you want the red area be part of the ScrollPane:
Create a VBox
Add The Red Area Component to VBox
Add the FlowPane to VBox
Set VBox as the ScrollPanes Content
If the Layout with VBox's doenst look statisfying try Borderpane and set the "Red Area" top and your flowpane as center.
Is there a way to use the z-index and place the red are in front of the FlowPane? Or some other solution?
see QuidNovi's answer
So I have a TextArea and as the user pastes paragraphs into it, or just writes in it, I want it to expand vertically to reveal all the available text. I.e. not to use a scrollbar in the text field itself... much like what happens on many web pages. Many users, myself included, don't like to be forced to edit in a small window. Exactly how Facebook status updates box works.
I've tried
myTextArea.autoSize()
wrapped in an
myTextArea.textProperty().addListener(new ChangeListener()....);
but that doesn't work. I think it's happy autosizing to its current size.
The left, right & top anchors are set to it's parent AnchorPane. I've tried it with the bottom attached and not attached. Ideally I'd like to grow the anchor pane as the textarea grows.
I don't mind reading the TextProperty and calculating a trigger size which I set myself... but this seems a hacky approach IF there is already a best practise. The number of properties and sub objects of javafx is sufficiently daunting that it seems like a good point to ask the question here, rather than trying to figure out how many pixels the font/paragraphs etc are taking up.
Update:
So I thought maybe I was overthinking it, and all I needed to do was to switch the scrollbars off and the rest would happen. Alas, looking for available fields and methods for "scroll", "vertical", "vbar" comes up with nothing I can use. ScrollTopProperty looks like it's for something else.
The problem; the height of textArea is wanted to be grown or shrunk while its text is changing by either user's typing or copy-pasting. Here is another approach:
public class TextAreaDemo extends Application {
private Text textHolder = new Text();
private double oldHeight = 0;
#Override
public void start(Stage primaryStage) {
final TextArea textArea = new TextArea();
textArea.setPrefSize(200, 40);
textArea.setWrapText(true);
textHolder.textProperty().bind(textArea.textProperty());
textHolder.layoutBoundsProperty().addListener(new ChangeListener<Bounds>() {
#Override
public void changed(ObservableValue<? extends Bounds> observable, Bounds oldValue, Bounds newValue) {
if (oldHeight != newValue.getHeight()) {
System.out.println("newValue = " + newValue.getHeight());
oldHeight = newValue.getHeight();
textArea.setPrefHeight(textHolder.getLayoutBounds().getHeight() + 20); // +20 is for paddings
}
}
});
Group root = new Group(textArea);
Scene scene = new Scene(root, 300, 250);
primaryStage.setScene(scene);
primaryStage.show();
// See the explanation below of the following line.
// textHolder.setWrappingWidth(textArea.getWidth() - 10); // -10 for left-right padding. Exact value can be obtained from caspian.css
}
public static void main(String[] args) {
launch(args);
}
}
But it has a drawback; the textarea's height is changing only if there are line breaks (ie Enter keys) between multiple lines, if the user types long enough the text gets wrapped to multiple line but the height is not changing.
To workaround this drawback I added this line
textHolder.setWrappingWidth(textArea.getWidth() - 10);
after primaryStage.show();. It works well for long typings where user does not linebreaks. However this generates another problem. This problem occurs when the user is deleting the text by hitting "backspace". The problem occurs exactly when the textHolder height is changed and where the textArea's height is set to new value. IMO it maybe a bug, didn't observe deeper.
In both case the copy-pasting is handling properly.
Awaiting a better, i use this hacky solution.
lookup the vertical scrollbar of the textarea.
make it transparent
listen to its visible property
when the scrollbar become visible i add a row to the textarea.
The code:
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.ObservableList;
import javafx.geometry.Orientation;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.ScrollBar;
import javafx.scene.control.TextArea;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
public class GrowGrowTextArea extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
AnchorPane root = new AnchorPane();
root.setStyle("-fx-padding:20;-fx-background-color:dodgerblue;");
final TextArea textArea = new TextArea();
AnchorPane.setTopAnchor(textArea, 10.0);
AnchorPane.setLeftAnchor(textArea, 10.0);
AnchorPane.setRightAnchor(textArea, 10.0);
root.getChildren().add(textArea);
primaryStage.setScene(new Scene(root, 400, 300));
primaryStage.show();
ScrollBar scrollBar = lookupVerticalScrollBar(textArea);
scrollBar.setOpacity(0.0);
scrollBar.visibleProperty().addListener(new ChangeListener<Boolean>() {
#Override
public void changed(ObservableValue<? extends Boolean> source,
Boolean wasVisible,
Boolean isVisible) {
if (isVisible) {
textArea.setPrefRowCount(textArea.getPrefRowCount() + 1);
textArea.requestLayout();
}
}
});
}
private ScrollBar lookupVerticalScrollBar(Node node) {
if (node instanceof ScrollBar && ((ScrollBar)node).getOrientation() == Orientation.VERTICAL) {
return (ScrollBar) node;
}
if (node instanceof Parent) {
ObservableList<Node> children = ((Parent) node).getChildrenUnmodifiable();
for (Node child : children) {
ScrollBar scrollBar = lookupVerticalScrollBar(child);
if (scrollBar != null) {
return scrollBar;
}
}
}
return null;
}
}
I had a similar problem with creating expanding TextArea. I was creating TextArea that looks like TextField and expand vertically every time when there is no more space in line.
I have tested all solutions that I could find on this topic on stack and other sources available. I found few good solutions but neither was good enough.
After many hours of fighting, I figured out this approach.
I extended TextArea class, override layoutChildren() method and add a listener on text height.
#Override
protected void layoutChildren() {
super.layoutChildren();
setWrapText(true);
addListenerToTextHeight();
}
private void addListenerToTextHeight() {
ScrollPane scrollPane = (ScrollPane) lookup(".scroll-pane");
scrollPane.setHbarPolicy(ScrollBarPolicy.NEVER);
scrollPane.setVbarPolicy(ScrollBarPolicy.NEVER);
StackPane viewport = (StackPane) scrollPane.lookup(".viewport");
Region content = (Region) viewport.lookup(".content");
Text text = (Text) content.lookup(".text");
text.textProperty().addListener(textHeightListener(text));
}
private InvalidationListener textHeightListener(Text text) {
return (property) -> {
// + 1 for little margin
double textHeight = text.getBoundsInLocal().getHeight() + 1;
//To prevent that our TextArena will be smaller than our TextField
//I used DEFAULT_HEIGHT = 18.0
if (textHeight < DEFAULT_HEIGHT) {
textHeight = DEFAULT_HEIGHT;
}
setMinHeight(textHeight);
setPrefHeight(textHeight);
setMaxHeight(textHeight);
};
}
I used some of the code found in the previous answers.
The growTextAreaIfNecessary method will increase the height of textArea until the scrollbar is not visible (limited to 20 lines in this example).
The problem with this approach is that the window needs to be redrawn several times until the perfect height is found.
private ScrollBar lookupVerticalScrollBar(Node node) {
if (node instanceof ScrollBar && ((ScrollBar) node).getOrientation() == Orientation.VERTICAL) {
return (ScrollBar) node;
}
if (node instanceof Parent) {
ObservableList<Node> children = ((Parent) node).getChildrenUnmodifiable();
for (Node child : children) {
ScrollBar scrollBar = lookupVerticalScrollBar(child);
if (scrollBar != null) {
return scrollBar;
}
}
}
return null;
}
private void growTextAreaIfNecessary(TextArea textArea) {
Platform.runLater(() -> {
ScrollBar lookupVerticalScrollBar = lookupVerticalScrollBar(textArea);
int prefRowCount = textArea.getPrefRowCount();
if (lookupVerticalScrollBar.isVisible() && prefRowCount < 20) {
textArea.setPrefRowCount(prefRowCount + 1);
System.out.println("increasing height to: " + (prefRowCount + 1));
growTextAreaIfNecessary(textArea);
}
});
}
I have tried many hacks, most of them had jitters while typing, this to me was the perfect result:
textArea.textProperty().addListener((obs,old,niu)->{
Text t = new Text(old+niu);
t.setFont(textArea.getFont());
StackPane pane = new StackPane(t);
pane.layout();
double height = t.getLayoutBounds().getHeight();
double padding = 20 ;
textArea.setMinHeight(height+padding);
});
I'm changing the height and the width of my CustomView which extends Android View in runtime like this:
#Override
public void onGlobalLayout() {
if(!initialized) {
int containerHeight = instance.getHeight();
int containerWidth = instance.getWidth();
myView.getLayoutParams().height = (int) (containerHeight * HEIGHT_RATIO);
myView.getLayoutParams().width = (int) (containerWidth * WIDTH_RATIO);
instance.getViewTreeObserver().removeGlobalOnLayoutListener(this);
initialized = true;
}
}
this code is in the container view Constructor.
In addition my CustomView onMeasure() is as follows:
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// maximum width we should use
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
setMeasuredDimension(width, height);
}
This is the result:
Where the width and height I specified are at the same size of the green rectangle.
My Question is: why does the actual size of my custom view (red rectangle) is not at the same size as I gave as input in the LayoutParams ?
not sure what object you're working with for your view, but you might try something like this:
CustomViewget.Window().setLayout(370, 480); //Controls width and height
My problem was in the drawing of the CustomView. In onDraw(), I took the width and height of the canvas instead of the View itself.
The sizes might not be calculated properly at the time of calling, so you may need to place your code in a handler and run it on post so that it gets done after everything else on the UI thread is done. Try the following code.
Handler handler = new Handler();
handler.post(new Runnable() {
public void run() {
//check sizes and update sizes here
});