Zoom In/Out Funda
Hi Everybody !
I am just new this forum.
I am working on a project which creates some drawing on the JPanel using Polygon class and now what I need is to zoom In and Zoom Out that Image. I have made that concept of zoom In and Zoom Out by Scaling Concept. It works but it also actutally creating a problem.
The Problem : We have large width as compare to height of that polygons that we are drawing on the JPanel. Polygon use to have DataStructure in Integer format and here when we try to either zoom In/Out the by scaling, as width is much large as comapre to height so sidth reduces/increasines perfectly as the neglecting factor that is the data comes after decimal doesn't put much affect over it. However when we consider the case of height, the neglection of data after decimals put much affect in increasing/decreasing the height. So it doesn'tr look nice after certain zoom IN/OUT operations.
The second problem that I am facing is that as we zoom out a certain number of times, few polygons lost out as their height tends to decreased below than one and then never regenerate itself on performing Zoom IN operations.
Does anybody help me out in this matter.
Thanks for your reading and consideration.
What context in the Finder would you expect zoom to work? same question for rotate?
I am able to see rotate and zoom working in iPhoto and Preview. I do not have Aperture so I cannot check.
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See Here > http://support.apple.com/kb/HT1212
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With no obvious warning it now seems unable to recognise the trackpad/point. I've tried various combinations of uninstalling/installing drivers etc with no success.
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Hello, this is my first post.
I'd like to add zoom in/out function to my ScrollPane, and make shortcut (CTRL+MOUSE SCROLL UP/DOWN) for it. ( like Inkscape )
I made the following code ( Canvas ) to achieve this, but have some problems.
*1. How can I prevent ScrollBar's thumb to move when pressing CTRL?*
When ScrollBar is visible and ScrollBar's thumb (or scroller, knob) has room to move, CTRL+MOUSE SCROLL UP/DOWN doesn't work because the thumb moves instead of zooming in/out.
When the thumb moves up/down to bar's end, then zoom in/out finally works fine.
*2. ScrollEvent handler is sometimes not called in ScrollPane*
When ScrollBarPolicy is not ScrollBarPolicy.ALWAYS and Scrollbar is not visible, SOMETIMES CTRL+SCROLL UP/DOWN operation dosen't work.
(ScrollEvent handler is not called. For other panes, ScrollEvent works fine. Please check MouseScrollEventTest below)
Thank you in advance.
Canvas
public class Canvas extends Application {
DoubleProperty zoom = new SimpleDoubleProperty(1.0);
final double MAX_ZOOM = 3.0;
final double MIN_ZOOM = 0.1;
@Override
public void start(Stage stage) throws Exception {
Rectangle rectangle = RectangleBuilder.create()
.width(1000).height(1000)
.fill( LinearGradientBuilder.create()
.stops(new Stop(0, Color.BLUE), new Stop(1, Color.RED))
.build()
).build();
ScrollPane scrollPane = ScrollPaneBuilder.create()
.content(
GroupBuilder.create()
.children(rectangle)
.build())
// .hbarPolicy(ScrollBarPolicy.ALWAYS)
// .vbarPolicy(ScrollBarPolicy.ALWAYS)
.build();
rectangle.scaleXProperty().bind(zoom);
rectangle.scaleYProperty().bind(zoom);
scrollPane.setOnScroll(new EventHandler<ScrollEvent>(){
public void handle(ScrollEvent event) {
if( !event.isControlDown() ) return ;
double zoomValue;
if ( event.getDeltaY() > 0 ) {
zoomValue = zoom.get() + 0.1;
} else {
zoomValue = zoom.get() - 0.1;
if( zoomValue > MAX_ZOOM || zoomValue < MIN_ZOOM ) return ;
zoom.set(zoomValue);
Scene scene = SceneBuilder.create()
.width(500).height(500)
.root(scrollPane)
.build();
stage.setScene(scene);
stage.show();
public static void main(String[] args) {
launch(args);
Mouse Scroll Event Test
public class MouseScrollEventTest extends Application {
BorderPane bPane;
ScrollPane sPane;
public void start(Stage stage) throws Exception {
EventHandler<ScrollEvent> handler = new EventHandler<ScrollEvent>() {
public void handle(ScrollEvent event) {
System.out.println(event);
bPane = new BorderPane();
bPane.setPrefSize(100, 100);
sPane = new ScrollPane();
sPane.setPrefSize(100, 100);
// sPane.setContent( new Rectangle(50,50) );
// This works fine.
bPane.setOnScroll(handler);
// Sometimes, this is not called.
sPane.setOnScroll(handler);
HBox root = new HBox();
root.getChildren().addAll(bPane, sPane);
Scene scene = new Scene(root);
// scene.setOnScroll(handler);
stage.setScene(scene);
stage.show();
public static void main(String[] args) {
launch(args);
}--- My Environment
Windows Vista
JavaFX 2.0 SDK
Edited by: 932474 on 2012/05/07 4:31
Edited by: 932474 on 2012/05/07 4:47Thank you for the good example.
But actually, I just give up using ScrollPane and created a ZoomCanvas which can zoom in/out and pan.
The code is here.
Any comments or improvement would be appreciated.
ZoomCanvas
public class ZoomCanvas extends StackPane {
private ZoomController zoomController;
private Group contentWrapper;
private double translateXWhenMousePressed, translateYWhenMousePressed;
private double xWhenMousePressed , yWhenMousePressed;
private static class ZoomController {
private int deltaCount = 0;
private final double DEFAULT_ZOOM = 1.0;
private boolean useAnimation = true;
private DoubleProperty zoomMax = new SimpleDoubleProperty(10.0);
private DoubleProperty zoomMin = new SimpleDoubleProperty(0.1);
private DoubleProperty zoomDelta = new SimpleDoubleProperty(1.2);
private DoubleProperty zoom = new SimpleDoubleProperty( DEFAULT_ZOOM );
public ZoomController() {
public void zoomIn() {
double zoomValue = DEFAULT_ZOOM * Math.pow(zoomDelta.get(), deltaCount+1);
if( zoomValue > zoomMax.get() ) {
setZoom(zoomMax.get());
return;
deltaCount++;
setZoom( zoomValue );
public void zoomOut() {
double zoomValue = DEFAULT_ZOOM * Math.pow(zoomDelta.get(), deltaCount-1);
if( zoomValue < zoomMin.get() ) {
setZoom(zoomMin.get());
return;
deltaCount--;
setZoom( zoomValue );
public void setZoom( double zoomValue ) {
if( useAnimation ) {
Timeline zoomTimeline = new Timeline();
zoomTimeline.getKeyFrames().add(
new KeyFrame(Duration.millis(300), new KeyValue(zoom, zoomValue))
zoomTimeline.play();
} else {
zoom.set(zoomValue);
public ZoomCanvas(Node content) {
super();
Rectangle clip = new Rectangle();
clip.widthProperty().bind(widthProperty());
clip.heightProperty().bind(heightProperty());
// to adjust layoutBounds when drawingPane's scale changes
contentWrapper = new Group(content);
StackPane.setAlignment(contentWrapper, Pos.CENTER);
getChildren().add(contentWrapper);
zoomController = new ZoomController();
content.scaleXProperty().bind(zoomController.zoom);
content.scaleYProperty().bind(zoomController.zoom);
content.translateXProperty();
hookEvents();
setClip(clip);
private void hookEvents() {
setOnScroll(new EventHandler<ScrollEvent>() {
public void handle(ScrollEvent event) {
if( event.getDeltaY() > 0 ) {
zoomController.zoomIn();
} else {
zoomController.zoomOut();
setOnMousePressed(new EventHandler<MouseEvent>(){
public void handle(MouseEvent event) {
if( !event.isMiddleButtonDown() ) return ;
translateXWhenMousePressed = contentWrapper.getTranslateX();
translateYWhenMousePressed = contentWrapper.getTranslateY();
xWhenMousePressed = event.getX();
yWhenMousePressed = event.getY();
setCursor(Cursor.MOVE);
event.consume();
setOnMouseReleased(new EventHandler<MouseEvent>(){
public void handle(MouseEvent event) {
setCursor(Cursor.DEFAULT);
setOnMouseDragged(new EventHandler<MouseEvent>(){
public void handle(MouseEvent event) {
if(!event.isMiddleButtonDown())
return;
contentWrapper.setTranslateX( translateXWhenMousePressed + event.getX() - xWhenMousePressed );
contentWrapper.setTranslateY( translateYWhenMousePressed + event.getY() - yWhenMousePressed );
event.consume();
ZoomCanvasTest
public class ZoomCanvasTest extends Application {
public void start(Stage primaryStage) throws Exception {
Rectangle rect = new Rectangle(0,0,100,100);
rect.setStyle("-fx-fill: blue;");
Circle circle = new Circle(100,100,50);
circle.setStyle("-fx-fill: red;");
Pane canvasContent = new Pane();
canvasContent.setStyle(
"-fx-background-color: papayawhip;" +
"-fx-border-color: black;");
canvasContent.getChildren().add(circle);
canvasContent.getChildren().add(rect);
ZoomCanvas canvas = new ZoomCanvas(canvasContent);
canvas.setStyle(
"-fx-background-color: mistyrose;" +
"-fx-border-color: black;"
ToolBar toolBar = new ToolBar();
toolBar.setOrientation(Orientation.VERTICAL);
toolBar.getItems().add( new Button("sample") );
BorderPane root = new BorderPane();
root.setCenter(canvas);
root.setRight(toolBar);
// root.getChildren().addAll(canvas, toolBar);
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();
public static void main(String[] args) {
launch(args);
}Edited by: 932474 on 2012/05/08 10:17
Edited by: 932474 on 2012/05/08 10:40
Edited by: 932474 on 2012/05/08 10:56 -
Hello,
Recently my browsers (safari,chrome) behave oddly, it auto zoom in/out, sometimes really fast like it shaking or something, so far it only happens when i'm using Wacom tablet, I don't know exactly when this started, I guess when I upgraded to 10.6.6, i've asked Wacom Support they suggested to re-install driver, but still problem persist. Maybe anyone here knows what's going on?Must be a setting on the tablet. You need to speak to Wacom.
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After zoom in/out to open callout is wrong position
Dear All
After zoom in/out screen , i open callout.
I'm having problems with its position
code:
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<s:Callout id="bCallout"
mouseDownOutside="bCallout.close()"
mouseUp="bCallout.close()"
backgroundColor="0x999999"
contentBackgroundAlpha="0"/>
</fx:Declarations>
<fx:Script>
private function zoom_action(act:String):void {
var z:Number;
if(act=='+'){
z=0.25;
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z=-0.25;
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<s:Button id="zoomin" y="10" right="108" width="44" height="42" label="+" alpha="0.5"
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click="zoom_action('-')"/>
Any ideas what I'm doing wrong?You need a Mac user to come along and give you better advice, but meanwhile, Goggle
photoshop cc lag yosemite
You are _not_ alone. -
i am having troulbe zooming in/out in video mode. i have to manually zoom in/out in photo mode, then go back to video mode to stay at those current settings, and shoot the video from there... how can i change my zoom lense in video mode?
sniper8752 wrote:
well thats dumb!
The camera is not the video recorder, two separate applications, they don't interact.
1. If any post helps you please click the below the post(s) that helped you.
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using magic mouse , i have accidently zoomed in and i cannot find how to zoom back out without actually having to close the program. i am a newbie - obviously.
regards
PCheck your settings in: System Preferences > Mouse
Deselect: Smart Zoom
And check settings in System Preferences > Accessibility > Zoom -
Zoom in-out and rotation in trackpad
Zoom in-out and rotation in trackpad doesn't work in iPhoto, Aperture, Preview, Finder. Any solution?
It works perfect at safariWhat context in the Finder would you expect zoom to work? same question for rotate?
I am able to see rotate and zoom working in iPhoto and Preview. I do not have Aperture so I cannot check. -
OBI HD App No zoom in/out option
Hi Experts,
I have got Oracle BI HD App on my ipad2 and its pointing to OBIEE 11.1.1.6.8 version and Zoom in/out is not avialable in it. I can see the dashboards as i see on any web browser.
Earlier when i pointed Oracle BI HD App to OBIEE 11.1.1.5.0 , zoom in/out option was avaiable and I need not have to scroll out horizontally(verticall scroll is fine).
please provide inputs if there is any configuration required for OBIEE 11.1.1.6.8 version Zoom in/out so that whole dashboard tab fits into my ipad screen and zoom in/out can be used.
Cheers
AnkitOracle Mobile HD on iPad Doesn't Allow to "Pinch to Zoom" or to Switch to "Mobile Layout" [ID 1534983.1]
Follow - BUG:15940998 - OBIEE MOBILE FEATURES MISSING AFTER PATCHING FROM 11.1.1.5 TO 11.1.1.6.X
HTH,
SVS
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