Hello Stackoverflow members, have a great day. Is there a way to convert or cast a writable image object to ImageView in order to display it in my program without the need to save the image on a hard drive.
WritableImage writable_image = barchart.snapshot(new SnapshotParameters(), null);
I need something that converts writable_image to ImaveView object.
You don't convert a WritableImage to an ImageView. An ImageView is a UI component designed to show an Image. Since WritableImage extends Image you don't have to do anything special.
ImageView imageView = ...;
WritableImage writableImage = barchart.snapshot(new SnapshotParameters(), null);
imageView.setImage(writableImage);
Related
In unity I am fetching a UI image through GameObject.Find() However when I try to change the value of another image component to the result of the game object find I get the error:
Cannot implicitly convert type 'UnityEngine.GameObject' to 'UnityEngine.UI.Image' \[Assembly-CSharp\]csharp(CS0029)
Code:
Image image;
image = GameObject.Find("the other image");
Is there a way to fetch a UI Image game object through just it's name without it being set to a generic game object?
You are attempting to assign the value of a image to a gameObject, you simply need to get the image
Image image;
var imageGameObject = GameObject.Find("the other image");
if(imageGameObject == null)
{
//couldn't find the gameobject
}
image = imageGameObject.GetComponenet<Image>();
to get the actual image component
My code is：but I can't find image in QWidget. What can I do if i want to show the image ? And what's wrong with my code?
QTtest::QTtest(QWidget *parent)
: QWidget(parent)
{
QHBoxLayout * m_viewLayout = new QHBoxLayout();
this->setLayout(m_viewLayout);
QHBoxLayout * showLayout = new QHBoxLayout();
QHBoxLayout * btnLayout = new QHBoxLayout();
m_viewLayout->addLayout(showLayout);
m_viewLayout->addLayout(btnLayout);
widget1 = new QWidget();
showLayout->addWidget(widget1);
QPixmap image("C:\\Users\\zhq\\Desktop\\1.png");
QPainter painter(widget1);
painter.drawPixmap(QPoint(0,0),image);
widget2 = new QWidget();
showLayout->addWidget(widget2);
QPushButton * btn = new QPushButton("btn");
btnLayout->addWidget(btn);
showLayout->addStretch();
}
There's a couple of thing wrong with your code.
Assuming that the image is loaded correctly, you should paint the image in the void QWidget::paintEvent(QPaintEvent * event) of your widget. Do not paint outside of paint events. Also, as you're currently doing it, the image will be overwritten the next time the widget updates/reapints itself anyway.
You might consider going an easier route and use a QLabel in your layout instead of widget1. You can then call QPixmap::fromImage() to convert the image to a pixmap and QLabel::setPixmap() on the label to display your image.
This is probably a newb question, but I'm having trouble understanding how to manipulate NSImage instances.
I'm trying to create a method that will take an NSImage (an icon), draw another NSImage over it (a checkmark), then return the modified NSImage instance.
I've looked at the section "Drawing to an Image" in the Cocoa Drawing Guide, but I still can't figure out how to return a modified NSImage.
Looking for something like:
(NSImage*) drawCheckbox:(NSImage*)originalImage {
NSImage* checkbox = [NSImage imageNamed:#"checkbox"];
// create and return new NSImage with checkbox drawn over originalImage
}
TIA!
First, make a copy of the original image. Then, draw into the new image as described in the documentation you mentioned. Finally, return your altered image using the return statement.
I'm having problems creating a BufferedImage from an offscreen JPanel. Specifically, I'm trying a draw the image of a JPanel (which contains some Java3D elements) as a background image for an application I'm working on.
I've found several threads describing how to do get a JPanel's Image by painting the JPanel to a BufferedImage's graphics context, but when I draw the BufferedImage, all I get is a big white rectangle.
Here's my code:
SimpleWorld j3DPanel; // a custom JPanel that contains some simple Java3D elements
// CONSTRUCTOR
public GameBackgroundObject()
{
super();
// Here I set up a JPanel that contains some Java3D elements.
j3DPanel = new SimpleWorld();
j3DPanel.setSize(mainLevel.SCREENW, mainLevel.SCREENH);
j3DPanel.setBounds(0,0,mainLevel.SCREENW, mainLevel.SCREENH);
j3DPanel.doLayout();
j3DPanel.validate();
}
protected void draw(Graphics2D parentComponentGraphics, ...)
{
super.draw(parentComponentGraphics, ...);
int w = j3DPanel.getWidth();
int h = j3DPanel.getHeight();
BufferedImage j3DImg = new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
Graphics2D g = j3DImg.createGraphics();
j3DPanel.paint(g);
parentComponentGraphics.drawImage(j3DImg, null, null);
}
Also, I've tried adding my JPanel to the contents of a JFrame. It works there and shows the rendered Java3D elements correctly. However, I just get this big white rectangle whenever I try to get the BufferedImage of the JPanel and draw that image.
Drawing a Java 3D scene probably fails because its Canvas3D component is heavyweight. Using the lightweight panel 'com.sun.j3d.exp.swing.JCanvas3D' might solve this problem. Its use is a bit tricky. See the corresponding Java 3D sample 'JCanvas3DExample' or try one of the derived works from here http://www.interactivemesh.org/testspace/j3dmeetsswing.html#leightweight
Try calling:
j3DPanel.paintComponent(g);
instead of:
j3DPanel.paint(g);
HI all,
I wnt to develop an ImageViewer using qt. I m trying to resize big images by scaling them. My problem is , when i change the screen orientation some part of the image gets clipped and also if i open the image in landscape mode, by default the size of image remains small even when i change back to portrait mode. What am i Doin wrong?
Please help me out. Heres the code dat i hv written
ImageViewer::ImageViewer()
{
setAttribute(Qt::WA_DeleteOnClose);
QAction *back = new QAction(this);
back->setText(QString("Back"));
connect(back,SIGNAL(triggered()),this,SLOT(close()));
back->setSoftKeyRole(QAction::PositiveSoftKey);
addAction(back);
imageLabel = new QLabel();
imageLabel->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
imageLabel->setAlignment(/*Qt::AlignLeft|*/Qt::AlignCenter);
QWidget *widget = new QWidget;
layout=new QStackedLayout();
layout->addWidget(imageLabel);
widget->setLayout(layout);
setCentralWidget(widget);
}
void ImageViewer::showImage(QString filePath)
{
QImageReader reader;
reader.setFileName(filePath);
QSize imageSize = reader.size();
imageSize.scale(size(), Qt::KeepAspectRatio);
reader.setScaledSize(imageSize);
QImage image = reader.read();
imageLabel->setPixmap(QPixmap::fromImage(image));
imageLabel->adjustSize();
}
You should re-implement QLabel's resizeEvent or install event filter to it and handle QResizeEvent there
The content of showImage method should go to handler of a resize event.
Currently you are using size() of ImageViewer widget (which seems to be derived from QMainWindow), it's better to use imageLabel.size(); or the best QResizeEvent::size() as this will prevent a problem if you will change UI layout in future.