| captureScreen |
() |
yoix.image |
| captureScreen |
(Component comp) |
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| captureScreen |
(Rectangle rect[, int raw]) |
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Returns an
Image
that represents a captured portion of the main display
screen.
With no arguments, the entire screen is captured.
With a component argument, for example a
JFrame
or a
JButton,
then just the specified component is captured.
When a
Rectangle
is provided, it specifies a portion of the screen to be captured.
By default, the rectangle is assumed to be in Yoix coordinates, namely
72 units per inch.
When a non-zero
int
argument is also supplied, then the coordinates are taken to be raw
screen pixel coordinates.
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| Return: |
Image
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| Example: |
The program,
import yoix.*.*;
Image img = captureScreen();
JFrame f = {
Dimension size = { int width = 72 * 6; int height = 72 * 5; };
BorderLayout layoutmanager;
int visible = TRUE;
Array layout = {
new JScrollPane {
String tag = "$_pane";
int scroll = AS_NEEDED;
Array layout = {
new JPanel {
String tag = "$_image";
Image backgroundimage = img;
int backgroundhints = SCALE_NONE;
Dimension preferredsize = img.size;
},
};
},
CENTER,
new JPanel {
FlowLayout layoutmanager;
Array layout = {
new JButton {
String text = "Capture Screen";
int mnemonic = KeyCode.VK_S;
actionPerformed(e) {
img = captureScreen();
root.components.$_image.size = img.size;
root.components.$_image.backgroundimage = img;
}
},
new JButton {
String text = "Capture Frame";
int mnemonic = KeyCode.VK_F;
actionPerformed(e) {
img = captureScreen(root);
root.components.$_image.size = img.size;
root.components.$_image.backgroundimage = img;
}
},
new JButton {
String text = "Capture Rectangle";
int mnemonic = KeyCode.VK_R;
actionPerformed(e) {
img = captureScreen(new Rectangle{
int x = random() * (VM.screen.width - 288);
int y = random() * (VM.screen.height - 288);
int width = 288;
int height = 288;
});
root.components.$_image.size = img.size;
root.components.$_image.backgroundimage = img;
}
},
new JButton {
String text = "Capture This!";
int mnemonic = KeyCode.VK_C;
actionPerformed(e) {
img = captureScreen(this);
root.components.$_image.size = img.size;
root.components.$_image.backgroundimage = img;
}
},
new JButton {
String text = "Quit";
int mnemonic = KeyCode.VK_Q;
actionPerformed(e) {
exit(0);
}
},
};
},
SOUTH,
};
};
creates a frame that initially displays a full screen capture in its
scroll pane area. It also has buttons for updating the screen capture,
for capturing just the frame itself, for capturing a random 4 inch
square potion of the screen, for capturing an image of the button
being pressed and for exiting.
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Yoix is a registered trademark of AT&T Inc.
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