ComponentWrapper (Codename One API)

All Known Subinterfaces:: ContainerWrapper

public interface ComponentWrapper

A class that wraps the important parts of a Component.

NOTE!.equals() and .hashcode() should be forwarded to the wrapped component. E.g.

        public int hashCode()
        {
                return getComponent().hashCode();
        }

        public final boolean equals(Object o)
        {
                 if (o instanceof ComponentWrapper == false)
                         return false;

                 return getComponent().equals(((ComponentWrapper) o).getComponent());
        }

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`TYPE_BUTTON`
`static int`	`TYPE_CHECK_BOX`
`static int`	`TYPE_COMBO_BOX`
`static int`	`TYPE_CONTAINER`
`static int`	`TYPE_IMAGE`
`static int`	`TYPE_LABEL`
`static int`	`TYPE_LIST`
`static int`	`TYPE_PANEL`
`static int`	`TYPE_PROGRESS_BAR`
`static int`	`TYPE_SCROLL_BAR`
`static int`	`TYPE_SCROLL_PANE`
`static int`	`TYPE_SEPARATOR`
`static int`	`TYPE_SLIDER`
`static int`	`TYPE_SPINNER`
`static int`	`TYPE_TABBED_PANE`
`static int`	`TYPE_TABLE`
`static int`	`TYPE_TEXT_AREA`
`static int`	`TYPE_TEXT_FIELD`
`static int`	`TYPE_TREE`
`static int`	`TYPE_UNKNOWN`
`static int`	`TYPE_UNSET`

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`int`	`getBaseline(int width, int height)` Returns the baseline for the component given the suggested height.
`Object`	`getComponent()` Returns the actual object that this wrapper is aggregating.
`int`	`getComponentType(boolean disregardScrollPane)` Returns the type of component that this wrapper is wrapping.
`int`	`getContentBias()` Returns in what way the min/pref/max sizes relates to it's height or width for the current settings of the component (like wrapText).
`int`	`getHeight()` Returns the current height for this component.
`int`	`getHorizontalScreenDPI()` Returns the DPI (Dots Per Inch) of the screen the component is currently in or for the default screen if the component is not visible.
`int`	`getLayoutHashCode()` Returns a hash code that should be reasonably different for anything that might change the layout.
`String`	`getLinkId()` Returns a String id that can be used to reference the component in link constraints.
`int`	`getMaximumHeight(int wHint)` Returns the maximum height of the component.
`int`	`getMaximumWidth(int hHint)` Returns the maximum width of the component.
`int`	`getMinimumHeight(int wHint)` Returns the minimum height of the component.
`int`	`getMinimumWidth(int hHint)` Returns the minimum width of the component.
`ContainerWrapper`	`getParent()` Returns the container for this component.
`float`	`getPixelUnitFactor(boolean isHor)` Returns the pixel unit factor for the horizontal or vertical dimension.
`int`	`getPreferredHeight(int wHint)` Returns the preferred height of the component.
`int`	`getPreferredWidth(int hHint)` Returns the preferred width of the component.
`int`	`getScreenHeight()` Returns the pixel size of the screen that the component is currently in or for the default screen if the component is not visible or `null`.
`int`	`getScreenLocationX()` Returns the screen x-coordinate for the upper left coordinate of the component layout-able bounds.
`int`	`getScreenLocationY()` Returns the screen y-coordinate for the upper left coordinate of the component layout-able bounds.
`int`	`getScreenWidth()` Returns the pixel size of the screen that the component is currently in or for the default screen if the component is not visible or `null`.
`int`	`getVerticalScreenDPI()` Returns the DPI (Dots Per Inch) of the screen the component is currently in or for the default screen if the component is not visible.
`int[]`	`getVisualPadding()` Returns the padding on a component by component basis.
`int`	`getWidth()` Returns the current width for this component.
`int`	`getX()` Returns the current x coordinate for this component.
`int`	`getY()` Returns the current y coordinate for this component.
`boolean`	`hasBaseline()` Returns if the component has a baseline and if it can be retrieved.
`boolean`	`isVisible()` Returns if the component's visibility is set to `true`.
`void`	`paintDebugOutline(boolean showVisualPadding)` Paints component outline to indicate where it is.
`void`	`setBounds(int x, int y, int width, int height)` Sets the component's bounds.

- Field Detail
  - TYPE_UNSET
```
static final int TYPE_UNSET
```
    See Also:
    
    Constant Field Values
  - TYPE_UNKNOWN
```
static final int TYPE_UNKNOWN
```
    See Also:
    
    Constant Field Values
  - TYPE_CONTAINER
```
static final int TYPE_CONTAINER
```
    See Also:
    
    Constant Field Values
  - TYPE_LABEL
```
static final int TYPE_LABEL
```
    See Also:
    
    Constant Field Values
  - TYPE_TEXT_FIELD
```
static final int TYPE_TEXT_FIELD
```
    See Also:
    
    Constant Field Values
  - TYPE_TEXT_AREA
```
static final int TYPE_TEXT_AREA
```
    See Also:
    
    Constant Field Values
  - TYPE_BUTTON
```
static final int TYPE_BUTTON
```
    See Also:
    
    Constant Field Values
  - TYPE_LIST
```
static final int TYPE_LIST
```
    See Also:
    
    Constant Field Values
  - TYPE_TABLE
```
static final int TYPE_TABLE
```
    See Also:
    
    Constant Field Values
  - TYPE_SCROLL_PANE
```
static final int TYPE_SCROLL_PANE
```
    See Also:
    
    Constant Field Values
  - TYPE_IMAGE
```
static final int TYPE_IMAGE
```
    See Also:
    
    Constant Field Values
  - TYPE_PANEL
```
static final int TYPE_PANEL
```
    See Also:
    
    Constant Field Values
  - TYPE_COMBO_BOX
```
static final int TYPE_COMBO_BOX
```
    See Also:
    
    Constant Field Values
  - TYPE_SLIDER
```
static final int TYPE_SLIDER
```
    See Also:
    
    Constant Field Values
  - TYPE_SPINNER
```
static final int TYPE_SPINNER
```
    See Also:
    
    Constant Field Values
  - TYPE_PROGRESS_BAR
```
static final int TYPE_PROGRESS_BAR
```
    See Also:
    
    Constant Field Values
  - TYPE_TREE
```
static final int TYPE_TREE
```
    See Also:
    
    Constant Field Values
  - TYPE_CHECK_BOX
```
static final int TYPE_CHECK_BOX
```
    See Also:
    
    Constant Field Values
  - TYPE_SCROLL_BAR
```
static final int TYPE_SCROLL_BAR
```
    See Also:
    
    Constant Field Values
  - TYPE_SEPARATOR
```
static final int TYPE_SEPARATOR
```
    See Also:
    
    Constant Field Values
  - TYPE_TABBED_PANE
```
static final int TYPE_TABBED_PANE
```
    See Also:
    
    Constant Field Values
- Method Detail
  - getComponent
```
Object getComponent()
```
    Returns the actual object that this wrapper is aggregating. This might be needed for getting information about the object that the wrapper interface does not provide.
    If this is a container the container should be returned instead.
    
    Returns:
    
    The actual object that this wrapper is aggregating. Not null.
  - getX
```
int getX()
```
    Returns the current x coordinate for this component.
    
    Returns:
    
    The current x coordinate for this component.
  - getY
```
int getY()
```
    Returns the current y coordinate for this component.
    
    Returns:
    
    The current y coordinate for this component.
  - getWidth
```
int getWidth()
```
    Returns the current width for this component.
    
    Returns:
    
    The current width for this component.
  - getHeight
```
int getHeight()
```
    Returns the current height for this component.
    
    Returns:
    
    The current height for this component.
  - getScreenLocationX
```
int getScreenLocationX()
```
    Returns the screen x-coordinate for the upper left coordinate of the component layout-able bounds.
    
    Returns:
    
    The screen x-coordinate for the upper left coordinate of the component layout-able bounds.
  - getScreenLocationY
```
int getScreenLocationY()
```
    Returns the screen y-coordinate for the upper left coordinate of the component layout-able bounds.
    
    Returns:
    
    The screen y-coordinate for the upper left coordinate of the component layout-able bounds.
  - getMinimumWidth
```
int getMinimumWidth(int hHint)
```
    Returns the minimum width of the component.
    
    Parameters:
    
    hHint - The Size hint for the other dimension. An implementation can use this value or the current size for the widget in this dimension, or a combination of both, to calculate the correct size.
    Use -1 to denote that there is no hint. This corresponds with SWT.DEFAULT.
    
    Returns:
    
    The minimum width of the component.
    
    Since:
    
    3.5. Added the hint as a parameter knowing that a correction and recompilation is necessary for any implementing classes. This change was worth it though.
  - getMinimumHeight
```
int getMinimumHeight(int wHint)
```
    Returns the minimum height of the component.
    
    Parameters:
    
    wHint - The Size hint for the other dimension. An implementation can use this value or the current size for the widget in this dimension, or a combination of both, to calculate the correct size.
    Use -1 to denote that there is no hint. This corresponds with SWT.DEFAULT.
    
    Returns:
    
    The minimum height of the component.
    
    Since:
    
    3.5. Added the hint as a parameter knowing that a correction and recompilation is necessary for any implementing classes. This change was worth it though.
  - getPreferredWidth
```
int getPreferredWidth(int hHint)
```
    Returns the preferred width of the component.
    
    Parameters:
    
    hHint - The Size hint for the other dimension. An implementation can use this value or the current size for the widget in this dimension, or a combination of both, to calculate the correct size.
    Use -1 to denote that there is no hint. This corresponds with SWT.DEFAULT.
    
    Returns:
    
    The preferred width of the component.
    
    Since:
    
    3.5. Added the hint as a parameter knowing that a correction and recompilation is necessary for any implementing classes. This change was worth it though.
  - getPreferredHeight
```
int getPreferredHeight(int wHint)
```
    Returns the preferred height of the component.
    
    Parameters:
    
    wHint - The Size hint for the other dimension. An implementation can use this value or the current size for the widget in this dimension, or a combination of both, to calculate the correct size.
    Use -1 to denote that there is no hint. This corresponds with SWT.DEFAULT.
    
    Returns:
    
    The preferred height of the component.
    
    Since:
    
    3.5. Added the hint as a parameter knowing that a correction and recompilation is necessary for any implementing classes. This change was worth it though.
  - getMaximumWidth
```
int getMaximumWidth(int hHint)
```
    Returns the maximum width of the component.
    
    Parameters:
    
    hHint - The Size hint for the other dimension. An implementation can use this value or the current size for the widget in this dimension, or a combination of both, to calculate the correct size.
    Use -1 to denote that there is no hint. This corresponds with SWT.DEFAULT.
    
    Returns:
    
    The maximum width of the component.
    
    Since:
    
    3.5. Added the hint as a parameter knowing that a correction and recompilation is necessary for any implementing classes. This change was worth it though.
  - getMaximumHeight
```
int getMaximumHeight(int wHint)
```
    Returns the maximum height of the component.
    
    Parameters:
    
    wHint - The Size hint for the other dimension. An implementation can use this value or the current size for the widget in this dimension, or a combination of both, to calculate the correct size.
    Use -1 to denote that there is no hint. This corresponds with SWT.DEFAULT.
    
    Returns:
    
    The maximum height of the component.
    
    Since:
    
    3.5. Added the hint as a parameter knowing that a correction and recompilation is necessary for any implementing classes. This change was worth it though.
  - setBounds
```
void setBounds(int x,
               int y,
               int width,
               int height)
```
    Sets the component's bounds.
    
    Parameters:
    
    x - The x coordinate.
    
    y - The y coordinate.
    
    width - The width.
    
    height - The height.
  - isVisible
```
boolean isVisible()
```
    Returns if the component's visibility is set to true. This should not return if the component is actually visible, but if the visibility is set to true or not.
    
    Returns:
    
    true means visible.
  - getBaseline
```
int getBaseline(int width,
                int height)
```
    Returns the baseline for the component given the suggested height.
    
    Parameters:
    
    width - The width to calculate for if other than the current. If -1 the current size should be used.
    
    height - The height to calculate for if other than the current. If -1 the current size should be used.
    
    Returns:
    
    The baseline from the top or -1 if not applicable.
  - hasBaseline
```
boolean hasBaseline()
```
    Returns if the component has a baseline and if it can be retrieved. Should for instance return false for Swing before mustang.
    
    Returns:
    
    If the component has a baseline and if it can be retrieved.
  - getParent
```
ContainerWrapper getParent()
```
    Returns the container for this component.
    
    Returns:
    
    The container for this component. Will return null if the component has no parent.
  - getPixelUnitFactor
```
float getPixelUnitFactor(boolean isHor)
```
    Returns the pixel unit factor for the horizontal or vertical dimension.
    The factor is 1 for both dimensions on the normal font in a JPanel on Windows. The factor should increase with a bigger "X".
    This is the Swing version:
```
 Rectangle2D r = fm.getStringBounds("X", parent.getGraphics());
 wFactor = r.getWidth() / 6;
 hFactor = r.getHeight() / 13.27734375f;
 
```
    Parameters:
    
    isHor - If it is the horizontal factor that should be returned.
    
    Returns:
    
    The factor.
  - getHorizontalScreenDPI
```
int getHorizontalScreenDPI()
```
    Returns the DPI (Dots Per Inch) of the screen the component is currently in or for the default screen if the component is not visible.
    If headless mode net.miginfocom.layout.PlatformDefaults#getDefaultDPI will be returned.
    
    Returns:
    
    The DPI.
  - getVerticalScreenDPI
```
int getVerticalScreenDPI()
```
    Returns the DPI (Dots Per Inch) of the screen the component is currently in or for the default screen if the component is not visible.
    If headless mode net.miginfocom.layout.PlatformDefaults#getDefaultDPI will be returned.
    
    Returns:
    
    The DPI.
  - getScreenWidth
```
int getScreenWidth()
```
    Returns the pixel size of the screen that the component is currently in or for the default screen if the component is not visible or null.
    If in headless mode 1024 is returned.
    
    Returns:
    
    The screen size. E.g. 1280.
  - getScreenHeight
```
int getScreenHeight()
```
    Returns the pixel size of the screen that the component is currently in or for the default screen if the component is not visible or null.
    If in headless mode 768 is returned.
    
    Returns:
    
    The screen size. E.g. 1024.
  - getLinkId
```
String getLinkId()
```
    Returns a String id that can be used to reference the component in link constraints. This value should return the default id for the component. The id can be set for a component in the constraints and if so the value returned by this method will never be used. If there are no sensible id for the component null should be returned.
    For instance the Swing implementation returns the string returned from Component.getName().
    
    Returns:
    
    The string link id or null.
  - getLayoutHashCode
```
int getLayoutHashCode()
```
    Returns a hash code that should be reasonably different for anything that might change the layout. This value is used to know if the component layout needs to clear any caches.
    
    Returns:
    
    A hash code that should be reasonably different for anything that might change the layout. Returns -1 if the widget is disposed.
  - getVisualPadding
```
int[] getVisualPadding()
```
    Returns the padding on a component by component basis. This method can be overridden to return padding to compensate for example for borders that have shadows or where the outer most pixel is not the visual "edge" to align to.
    Default implementation returns null for all components except for Windows XP's JTabbedPane which will return new Insets(0, 0, 2, 2).
    NOTE! To reduce generated garbage the returned padding should never be changed so that the same insets can be returned many times.
    
    Returns:
    
    null if no padding. NOTE! To reduce generated garbage the returned padding should never be changed so that the same insets can be returned many times. [top, left, bottom, right]
  - paintDebugOutline
```
void paintDebugOutline(boolean showVisualPadding)
```
    Paints component outline to indicate where it is.
    
    Parameters:
    
    showVisualPadding - If the visual padding should be shown in the debug drawing.
  - getComponentType
```
int getComponentType(boolean disregardScrollPane)
```
    Returns the type of component that this wrapper is wrapping.
    This method can be invoked often so the result should be cached.
    
    Parameters:
    
    disregardScrollPane - Is true any wrapping scroll pane should be disregarded and the type of the scrolled component should be returned.
    
    Returns:
    
    The type of component that this wrapper is wrapping. E.g. TYPE_LABEL.
  - getContentBias
```
int getContentBias()
```
    Returns in what way the min/pref/max sizes relates to it's height or width for the current settings of the component (like wrapText). If the min/pref/max height depends on it's width return net.miginfocom.layout.LayoutUtil#HORIZONTAL If the min/pref/max width depends on it's height (not common) return net.miginfocom.layout.LayoutUtil#VERTICAL If there is no connection between the preferred min/pref/max and the size of the component return -1.
    
    Since:
    
    5.0

Interface ComponentWrapper

Field Summary

Method Summary

Field Detail

TYPE_UNSET

TYPE_UNKNOWN

TYPE_CONTAINER

TYPE_LABEL

TYPE_TEXT_FIELD

TYPE_TEXT_AREA

TYPE_BUTTON

TYPE_LIST

TYPE_TABLE

TYPE_SCROLL_PANE

TYPE_IMAGE

TYPE_PANEL

TYPE_COMBO_BOX

TYPE_SLIDER

TYPE_SPINNER

TYPE_PROGRESS_BAR

TYPE_TREE

TYPE_CHECK_BOX

TYPE_SCROLL_BAR

TYPE_SEPARATOR

TYPE_TABBED_PANE

Method Detail

getComponent

getX

getY

getWidth

getHeight

getScreenLocationX

getScreenLocationY

getMinimumWidth

getMinimumHeight

getPreferredWidth

getPreferredHeight

getMaximumWidth

getMaximumHeight

setBounds

isVisible

getBaseline

hasBaseline

getParent

getPixelUnitFactor

getHorizontalScreenDPI

getVerticalScreenDPI

getScreenWidth

getScreenHeight

getLinkId

getLayoutHashCode

getVisualPadding

paintDebugOutline

getComponentType

getContentBias