Package org.eclipse.nebula.widgets.gallery

Class DefaultGalleryGroupRenderer

java.lang.Object

org.eclipse.nebula.widgets.gallery.AbstractGalleryGroupRenderer

org.eclipse.nebula.widgets.gallery.AbstractGridGroupRenderer

org.eclipse.nebula.widgets.gallery.DefaultGalleryGroupRenderer

public class DefaultGalleryGroupRenderer
extends AbstractGridGroupRenderer

Default group renderer used by the Gallery widget. Supports multi-line text, images, animation and several other features.

NOTE: THIS WIDGET AND ITS API ARE STILL UNDER DEVELOPMENT.

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	animation
protected IMovement	animationCloseMovement
protected int	animationLength
protected IMovement	animationOpenMovement
protected static java.lang.String	DATA_ANIMATION
(package private) boolean	marginCalculated	True if margins have already been calculated.

Fields inherited from class org.eclipse.nebula.widgets.gallery.AbstractGridGroupRenderer

autoMargin, DEFAULT_SIZE, EMPTY_STRING, H_COUNT, itemHeight, itemWidth, margin, minMargin, V_COUNT

Fields inherited from class org.eclipse.nebula.widgets.gallery.AbstractGalleryGroupRenderer

expanded, gallery

Constructor Summary

Constructors

Constructor	Description
DefaultGalleryGroupRenderer()	This group renderer draws a title line, then items in a grid layout.

Method Summary

Modifier and Type	Method	Description
void	draw(org.eclipse.swt.graphics.GC gc, GalleryItem group, int x, int y, int clipX, int clipY, int clipWidth, int clipHeight)	Group size informations can be retrieved from group.
protected void	drawGroup(org.eclipse.swt.graphics.GC gc, GalleryItem group, int x, int y, int clipX, int clipY, int clipWidth, int clipHeight)
protected void	drawGroupBackground(org.eclipse.swt.graphics.GC gc, GalleryItem item, int x, int y, int width, int height)	Draw group background using system default gradient or the user-defined color.
protected int	drawGroupToggleButton(org.eclipse.swt.graphics.GC gc, int x, int y, GalleryItem group)	Draw the toggle button.
protected void	drawItem(org.eclipse.swt.graphics.GC gc, int index, boolean selected, GalleryItem parent, int offsetY)	Draw a child item.
IMovement	getAnimationCloseMovement()
int	getAnimationLength()
IMovement	getAnimationOpenMovement()	Get the current movement used for animation
org.eclipse.swt.graphics.Font	getFont()	Returns the font used for drawing the group title or null if system font is used.
protected int	getGroupHeight(GalleryItem group)
protected int	getGroupOffset(GalleryItem item)	Returns a group offset (size of title + margin)
protected java.lang.String	getGroupTitle(GalleryItem group)
GalleryItem	getItem(GalleryItem group, org.eclipse.swt.graphics.Point coords)	Returns the item at coords relative to the parent group.
int	getMaxImageHeight()
int	getMaxImageWidth()
int	getScrollBarIncrement()	Returns the preferred Scrollbar increment for the current gallery layout.
org.eclipse.swt.graphics.Rectangle	getSize(GalleryItem item)	Returns the size of a group.
org.eclipse.swt.graphics.Color	getTitleBackground()
org.eclipse.swt.graphics.Color	getTitleBackground2()
org.eclipse.swt.graphics.Color	getTitleForeground()	Get group title text color.
protected org.eclipse.swt.graphics.Rectangle	getToggleButtonBounds()
boolean	isAnimation()
boolean	isFillIfSingleColumn()
protected boolean	isGroupExpanded(GalleryItem item)	Return item expand state (item.isExpanded()) Returns always true is alwaysExpanded is set to true.
boolean	isTitleBackgroundGradient()
void	layout(org.eclipse.swt.graphics.GC gc, GalleryItem group)	This method is called on each root item when the Gallery changes (resize, item addition or removal) in order to update the gallery size.
boolean	mouseDown(GalleryItem group, org.eclipse.swt.widgets.Event e, org.eclipse.swt.graphics.Point coords)	This method can be implemented to handle mouse down events at the group level.
void	preDraw(org.eclipse.swt.graphics.GC gc)	This method is called before drawing the first item.
void	preLayout(org.eclipse.swt.graphics.GC gc)	This method is called before the layout of the first item.
void	setAnimation(boolean animation)	Enable animation for group expand/collapse.
void	setAnimationCloseMovement(IMovement animationMovement)	Set the movement used for close animation.
void	setAnimationLength(int animationLength)	Set the length of the animation
void	setAnimationOpenMovement(IMovement animationMovement)	Set the movement used for open animation.
void	setFillIfSingleColumn(boolean fillIfSingle)	Experimental feature.
void	setFont(org.eclipse.swt.graphics.Font font)	Set the font for drawing the group title or null to use system font.
void	setGallery(Gallery gallery)
void	setMaxImageHeight(int imageHeight)	Set the maximum height for a group image in the title bar.
void	setMaxImageWidth(int imageWidth)	Set the maximum width for a group image in the title bar.
void	setTitleBackground(org.eclipse.swt.graphics.Color titleBackground)
void	setTitleBackgroundGradient(org.eclipse.swt.graphics.Color gradientBackground, org.eclipse.swt.graphics.Color gradientForeground)
void	setTitleForeground(org.eclipse.swt.graphics.Color titleColor)	Change group title text color.
protected void	startGroupAnimation(GalleryItem group, boolean doOpen)

Methods inherited from class org.eclipse.nebula.widgets.gallery.AbstractGridGroupRenderer

calculateMargins, dispose, getItem, getItemHeight, getItemWidth, getLayoutData, getMinMargin, getNextItem, getSize, getSize, getVisibleItems, gridLayout, isAlwaysExpanded, isAutoMargin, mouseDown, setAlwaysExpanded, setAutoMargin, setItemHeight, setItemSize, setItemWidth, setMinMargin

Methods inherited from class org.eclipse.nebula.widgets.gallery.AbstractGalleryGroupRenderer

getBackground, getFont, getForeground, getGallery, getGroupPosition, getGroupSize, isDebugMode, isExpanded, notifyTreeListeners, postDraw, postLayout, setExpanded, setGroupSize, updateScrollBarsProperties, updateStructuralValues

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

marginCalculated

boolean marginCalculated

True if margins have already been calculated. Prevents margins calculation for each group

animation

protected boolean animation

animationLength

protected int animationLength

animationOpenMovement

protected IMovement animationOpenMovement

animationCloseMovement

protected IMovement animationCloseMovement

DATA_ANIMATION

protected static final java.lang.String DATA_ANIMATION

See Also:

Constant Field Values

Constructor Details

DefaultGalleryGroupRenderer

public DefaultGalleryGroupRenderer()

This group renderer draws a title line, then items in a grid layout.

Method Details

setGallery

public void setGallery(Gallery gallery)

Overrides:

setGallery in class AbstractGalleryGroupRenderer

drawGroupBackground

protected void drawGroupBackground(org.eclipse.swt.graphics.GC gc, GalleryItem item, int x, int y, int width, int height)

Draw group background using system default gradient or the user-defined color.

Parameters:

gc -

item - TODO

x -

y -

width -

height -

drawGroupToggleButton

protected int drawGroupToggleButton(org.eclipse.swt.graphics.GC gc, int x, int y, GalleryItem group)

Draw the toggle button.

Parameters:

gc -

x -

y -

group -

getToggleButtonBounds

protected org.eclipse.swt.graphics.Rectangle getToggleButtonBounds()

getGroupHeight

protected int getGroupHeight(GalleryItem group)

drawGroup

protected void drawGroup(org.eclipse.swt.graphics.GC gc, GalleryItem group, int x, int y, int clipX, int clipY, int clipWidth, int clipHeight)

getGroupTitle

protected java.lang.String getGroupTitle(GalleryItem group)

getGroupOffset

protected int getGroupOffset(GalleryItem item)

Returns a group offset (size of title + margin)

Parameters:

item -

Returns:

group offset or 0 if the item is not a group

draw

public void draw(org.eclipse.swt.graphics.GC gc, GalleryItem group, int x, int y, int clipX, int clipY, int clipWidth, int clipHeight)

Description copied from class: AbstractGalleryGroupRenderer

Group size informations can be retrieved from group. Clipping informations

Overrides:

draw in class AbstractGridGroupRenderer

See Also:

AbstractGridGroupRenderer.draw(org .eclipse.swt.graphics.GC, org.eclipse.nebula.widgets.gallery.GalleryItem, int, int, int, int, int, int)

layout

public void layout(org.eclipse.swt.graphics.GC gc, GalleryItem group)

Description copied from class: AbstractGalleryGroupRenderer

This method is called on each root item when the Gallery changes (resize, item addition or removal) in order to update the gallery size. The implementation must update the item internal size (px) using setGroupSize(item, size); before returning.

Overrides:

layout in class AbstractGridGroupRenderer

preDraw

public void preDraw(org.eclipse.swt.graphics.GC gc)

Description copied from class: AbstractGalleryGroupRenderer

This method is called before drawing the first item. It can be used to calculate some values (like font metrics) that will be used for each item.

Overrides:

preDraw in class AbstractGalleryGroupRenderer

preLayout

public void preLayout(org.eclipse.swt.graphics.GC gc)

Description copied from class: AbstractGalleryGroupRenderer

This method is called before the layout of the first item. It can be used to calculate some values (like font metrics) that will be used for each item.

Overrides:

preLayout in class AbstractGridGroupRenderer

See Also:

(org.eclipse.swt.graphics.GC)

getItem

public GalleryItem getItem(GalleryItem group, org.eclipse.swt.graphics.Point coords)

Description copied from class: AbstractGalleryGroupRenderer

Returns the item at coords relative to the parent group.

Overrides:

getItem in class AbstractGridGroupRenderer

Returns:

See Also:

AbstractGridGroupRenderer.getItem( org.eclipse.nebula.widgets.gallery.GalleryItem, org.eclipse.swt.graphics.Point)

startGroupAnimation

protected void startGroupAnimation(GalleryItem group, boolean doOpen)

mouseDown

public boolean mouseDown(GalleryItem group, org.eclipse.swt.widgets.Event e, org.eclipse.swt.graphics.Point coords)

Description copied from class: AbstractGalleryGroupRenderer

This method can be implemented to handle mouse down events at the group level. Usually to interact with custom group UI.

Specified by:

mouseDown in class AbstractGalleryGroupRenderer

Parameters:

group - The group on which the mouse click occured

e - The original mouse event

coords - The pointer coordinates relative to the group

Returns:

false if event was handled by the group renderer and Gallery should not try to handle this event as a click on a GalleryItem.

See Also:

AbstractGalleryGroupRenderer.mouseDown(org.eclipse.nebula.widgets.gallery.GalleryItem, org.eclipse.swt.widgets.Event, org.eclipse.swt.graphics.Point)

getSize

public org.eclipse.swt.graphics.Rectangle getSize(GalleryItem item)

Description copied from class: AbstractGalleryGroupRenderer

Returns the size of a group.

Overrides:

getSize in class AbstractGridGroupRenderer

Returns:

See Also:

AbstractGridGroupRenderer.getSize( org.eclipse.nebula.widgets.gallery.GalleryItem)

getTitleForeground

public org.eclipse.swt.graphics.Color getTitleForeground()

Get group title text color.

Returns:

current color.

setTitleForeground

public void setTitleForeground(org.eclipse.swt.graphics.Color titleColor)

Change group title text color.

Parameters:

titleColor - Color or null to revert to default.

getTitleBackground

public org.eclipse.swt.graphics.Color getTitleBackground()

setTitleBackground

public void setTitleBackground(org.eclipse.swt.graphics.Color titleBackground)

setTitleBackgroundGradient

public void setTitleBackgroundGradient(org.eclipse.swt.graphics.Color gradientBackground, org.eclipse.swt.graphics.Color gradientForeground)

getFont

public org.eclipse.swt.graphics.Font getFont()

Returns the font used for drawing the group title or null if system font is used.

Returns:

the font

setFont

public void setFont(org.eclipse.swt.graphics.Font font)

Set the font for drawing the group title or null to use system font.

Parameters:

font - the font to set

drawItem

protected void drawItem(org.eclipse.swt.graphics.GC gc, int index, boolean selected, GalleryItem parent, int offsetY)

Description copied from class: AbstractGridGroupRenderer

Draw a child item. Only used when useGroup is true.

Overrides:

drawItem in class AbstractGridGroupRenderer

See Also:

(org.eclipse.swt.graphics.GC, int, boolean, org.eclipse.nebula.widgets.gallery.GalleryItem, int)

getScrollBarIncrement

public int getScrollBarIncrement()

Description copied from class: AbstractGalleryGroupRenderer

Returns the preferred Scrollbar increment for the current gallery layout.

Overrides:

getScrollBarIncrement in class AbstractGalleryGroupRenderer

Returns:

isFillIfSingleColumn

public boolean isFillIfSingleColumn()

Returns:

See Also:

setFillIfSingleColumn(boolean)

setFillIfSingleColumn

public void setFillIfSingleColumn(boolean fillIfSingle)

Experimental feature.

If set to true, this will enable a special behavior when the items are so large that only one can fit in the client area. In this case, items are always resized and centered to fit best in the client area.

See bug 266613 : https://bugs.eclipse.org/266613

Parameters:

fillIfSingle -

getMaxImageWidth

public int getMaxImageWidth()

Returns:

See Also:

setMaxImageWidth(int)

setMaxImageWidth

public void setMaxImageWidth(int imageWidth)

Set the maximum width for a group image in the title bar.

Parameters:

imageWidth -

See Also:

GalleryItem.setImage(Image)

getMaxImageHeight

public int getMaxImageHeight()

Returns:

See Also:

setMaxImageHeight(int)

setMaxImageHeight

public void setMaxImageHeight(int imageHeight)

Set the maximum height for a group image in the title bar.

Parameters:

imageHeight -

See Also:

GalleryItem.setImage(Image)

isAnimation

public boolean isAnimation()

Returns:

See Also:

setAnimation(boolean)

setAnimation

public void setAnimation(boolean animation)

Enable animation for group expand/collapse.

Parameters:

animation -

See Also:

setAnimationLength(int), setAnimationOpenMovement(IMovement)

getAnimationLength

public int getAnimationLength()

Returns:

See Also:

setAnimationLength(int)

setAnimationLength

public void setAnimationLength(int animationLength)

Set the length of the animation

Parameters:

animationLength -

See Also:

setAnimation(boolean), setAnimationOpenMovement(IMovement)

getAnimationOpenMovement

public IMovement getAnimationOpenMovement()

Get the current movement used for animation

Returns:

See Also:

setAnimationOpenMovement(IMovement)

getAnimationCloseMovement

public IMovement getAnimationCloseMovement()

Returns:

See Also:

setAnimationCloseMovement(IMovement)

setAnimationOpenMovement

public void setAnimationOpenMovement(IMovement animationMovement)

Set the movement used for open animation.

Parameters:

animationMovement -

See Also:

setAnimation(boolean), setAnimationLength(int)

setAnimationCloseMovement

public void setAnimationCloseMovement(IMovement animationMovement)

Set the movement used for close animation.

Parameters:

animationMovement -

See Also:

setAnimation(boolean), setAnimationLength(int)

isGroupExpanded

protected boolean isGroupExpanded(GalleryItem item)

Description copied from class: AbstractGridGroupRenderer

Return item expand state (item.isExpanded()) Returns always true is alwaysExpanded is set to true.

Overrides:

isGroupExpanded in class AbstractGridGroupRenderer

Returns:

isTitleBackgroundGradient

public boolean isTitleBackgroundGradient()

getTitleBackground2

public org.eclipse.swt.graphics.Color getTitleBackground2()