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java.lang.Objectjava.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JPanel
com.bric.swing.ColorPickerPanel
public class ColorPickerPanel
This is the large graphic element in the ColorPicker
that depicts a wide range of colors.
This panel can operate in 6 different modes. In each mode a different
property is held constant: hue, saturation, brightness, red, green, or blue.
(Each property is identified with a constant in the ColorPicker
class,
such as: ColorPicker.HUE
or ColorPicker.GREEN
.)
In saturation and brightness mode, a wheel is used. Although it doesn't use as many pixels as a square does: it is a very aesthetic model since the hue can wrap around in a complete circle. (Also, on top of looks, this is how most people learn to think the color spectrum, so it has that advantage, too). In all other modes a square is used.
The user can click in this panel to select a new color. The selected color is highlighted with a circle drawn around it. Also once this component has the keyboard focus, the user can use the arrow keys to traverse the available colors.
Note this component is public and exists independently of the
ColorPicker
class. The only way this class is dependent
on the ColorPicker
class is when the constants for the modes
are used.
The graphic in this panel will be based on either the width or the height of this component: depending on which is smaller.
Nested Class Summary |
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Nested classes/interfaces inherited from class javax.swing.JPanel |
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JPanel.AccessibleJPanel |
Nested classes/interfaces inherited from class javax.swing.JComponent |
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JComponent.AccessibleJComponent |
Nested classes/interfaces inherited from class java.awt.Container |
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Container.AccessibleAWTContainer |
Nested classes/interfaces inherited from class java.awt.Component |
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Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy |
Field Summary | |
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static int |
MAX_SIZE
The maximum size the graphic will be. |
Fields inherited from class javax.swing.JComponent |
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accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW |
Fields inherited from class java.awt.Component |
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BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT |
Fields inherited from interface java.awt.image.ImageObserver |
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ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH |
Constructor Summary | |
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ColorPickerPanel()
Creates a new ColorPickerPanel |
Method Summary | |
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void |
addChangeListener(ChangeListener l)
This listener will be notified when the current HSB or RGB values change. |
protected void |
fireChangeListeners()
|
float[] |
getHSB()
|
float[] |
getHSB(Point p)
Returns the color at the indicated point in HSB values. |
int[] |
getRGB()
|
int[] |
getRGB(Point p)
Returns the color at the indicated point in RGB values. |
void |
paint(Graphics g)
|
void |
removeChangeListener(ChangeListener l)
Remove a ChangeListener so it is no longer
notified when the selected color changes. |
void |
setHSB(float h,
float s,
float b)
Sets the selected color of this panel. |
void |
setMode(int mode)
Set the mode of this panel. |
void |
setRGB(int r,
int g,
int b)
Sets the selected color of this panel. |
Methods inherited from class javax.swing.JPanel |
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getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final int MAX_SIZE
(This is enforced because only 1 BufferedImage is used to render the graphic. This image is created once at a fixed size and is never replaced.)
Constructor Detail |
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public ColorPickerPanel()
ColorPickerPanel
Method Detail |
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public void addChangeListener(ChangeListener l)
public void removeChangeListener(ChangeListener l)
ChangeListener
so it is no longer
notified when the selected color changes.
protected void fireChangeListeners()
public void paint(Graphics g)
paint
in class JComponent
public void setMode(int mode)
mode
- This must be one of the following constants from the ColorPicker
class:
HUE
, SAT
, BRI
, RED
, GREEN
, or BLUE
public void setRGB(int r, int g, int b)
If this panel is in HUE, SAT, or BRI mode, then
this method converts these values to HSB coordinates
and calls setHSB
.
This method may regenerate the graphic if necessary.
r
- the red value of the selected color.g
- the green value of the selected color.b
- the blue value of the selected color.public float[] getHSB()
public int[] getRGB()
public float[] getHSB(Point p)
p
- a point relative to this panel.
public int[] getRGB(Point p)
p
- a point relative to this panel.
public void setHSB(float h, float s, float b)
If this panel is in RED, GREEN, or BLUE mode, then
this method converts these values to RGB coordinates
and calls setRGB
.
This method may regenerate the graphic if necessary.
h
- the hue value of the selected color.s
- the saturation value of the selected color.b
- the brightness value of the selected color.
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