Gamedev Framework (gf)  0.3.0
A C++11 framework for 2D games
Public Member Functions | List of all members
gf::NinePatch Class Reference

A nine-patch. More...

#include <gf/NinePatch.h>

Inheritance diagram for gf::NinePatch:
Inheritance graph
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Public Member Functions

 NinePatch ()
 Default constructor. More...
 
 NinePatch (const Texture &texture)
 Construct the nine-patch from a source texture. More...
 
 NinePatch (const Texture &texture, const RectF &textureRect)
 Construct the nine-patch from a sub-rectangle of a source texture. More...
 
void setTexture (const Texture &texture, bool resetRect=false)
 Change the source texture of the nine-patch. More...
 
const TexturegetTexture () const
 Get the source texture of the nine-patch. More...
 
void unsetTexture ()
 Unset the source texture of the nine-patch. More...
 
void setTextureRect (const RectF &rect)
 Set the sub-rectangle of the texture that the nine-patch will display. More...
 
const RectFgetTextureRect () const
 Get the sub-rectangle of the texture displayed by the nine-patch. More...
 
void setColor (const Color4f &color)
 Set the global color of the nine-patch. More...
 
const Color4fgetColor () const
 Get the global color of the nine-patch. More...
 
void setLimits (float top, float bottom, float left, float right)
 Set the limits of the stretchable area. More...
 
void setVerticalLimits (float top, float bottom)
 Set the vertical limits of the stretchable area. More...
 
void setHorizontalLimits (float left, float right)
 Set the horizontal limits of the stretchable area. More...
 
void setSize (Vector2f size)
 Set the size of the stretched area. More...
 
Vector2f getSize () const
 Get the size of the stretched area. More...
 
RectF getLocalBounds () const
 Get the local bounding rectangle of the entity. More...
 
void setAnchor (Anchor anchor)
 Set the anchor origin of the entity. More...
 
VertexBuffer commitGeometry () const
 Create a buffer with the current geometry. More...
 
virtual void draw (RenderTarget &target, RenderStates states) override
 Draw the object to a render target. More...
 
- Public Member Functions inherited from gf::Transformable
 Transformable ()
 Default constructor. More...
 
void setOrigin (Vector2f origin)
 Set the local origin of the object. More...
 
Vector2f getOrigin () const
 Get the local origin of the object. More...
 
void setPosition (Vector2f position)
 Set the position of the object. More...
 
Vector2f getPosition () const
 Get the position of the object. More...
 
void move (Vector2f offset)
 Move the object by a given offset. More...
 
void setRotation (float angle)
 Set the orientation of the object. More...
 
float getRotation () const
 Get the orientation of the object. More...
 
void rotate (float angle)
 Rotate the object. More...
 
void setScale (Vector2f factors)
 Set the scale factors of the object. More...
 
void setScale (float factor)
 Set the scale factor of the object. More...
 
Vector2f getScale () const
 Get the current scale of the object. More...
 
void scale (Vector2f factors)
 Scale the object. More...
 
void scale (float factor)
 Scale the object. More...
 
Matrix3f getTransform () const
 Get the combined transform of the object. More...
 
Matrix3f getInverseTransform () const
 Get the inverse of the combined transform of the object. More...
 
- Public Member Functions inherited from gf::Drawable
virtual ~Drawable ()
 Virtual desctructor. More...
 

Additional Inherited Members

- Protected Member Functions inherited from gf::Transformable
void setOriginFromAnchorAndBounds (Anchor anchor, const RectF &bounds)
 Set the origin from an anchor and bounds. More...
 

Detailed Description

A nine-patch.

A nine-patch is a stretchable image that can be automatically resized. You just have to indicate the position of the stretchable area and that's it.

See also
Android Developers: Draw 9-patch
Android Developers: Nine-patch

Constructor & Destructor Documentation

gf::NinePatch::NinePatch ( )

Default constructor.

Creates an empty nine-patch with no source texture

gf::NinePatch::NinePatch ( const Texture texture)

Construct the nine-patch from a source texture.

Parameters
textureSource texture
See also
setTexture()
gf::NinePatch::NinePatch ( const Texture texture,
const RectF textureRect 
)

Construct the nine-patch from a sub-rectangle of a source texture.

Parameters
textureSource texture
textureRectSub-rectangle of the texture to assign to the nine-patch
See also
setTexture(), setTextureRect()

Member Function Documentation

VertexBuffer gf::NinePatch::commitGeometry ( ) const

Create a buffer with the current geometry.

The geometry is uploaded in the graphics memory so that it's faster to draw.

Returns
A buffer with the current geometry
virtual void gf::NinePatch::draw ( RenderTarget target,
RenderStates  states 
)
overridevirtual

Draw the object to a render target.

This is a pure virtual function that has to be implemented by the derived class to define how the drawable should be drawn.

Parameters
targetRender target to draw to
statesCurrent render states

Implements gf::Drawable.

const Color4f& gf::NinePatch::getColor ( ) const

Get the global color of the nine-patch.

Returns
Global color of the nine-patch
See also
setColor()
RectF gf::NinePatch::getLocalBounds ( ) const

Get the local bounding rectangle of the entity.

The returned rectangle is in local coordinates, which means that it ignores the transformations (translation, rotation, scale, ...) that are applied to the entity. In other words, this function returns the bounds of the entity in the entity's coordinate system.

Returns
Local bounding rectangle of the entity
Vector2f gf::NinePatch::getSize ( ) const
inline

Get the size of the stretched area.

Returns
The size of the stretched area
const Texture* gf::NinePatch::getTexture ( ) const
inline

Get the source texture of the nine-patch.

If the nine-patch has no source texture, a nullptr pointer is returned. The returned pointer is const, which means that you can't modify the texture when you retrieve it with this function.

Returns
Pointer to the nine-patch's texture
See also
setTexture()
const RectF& gf::NinePatch::getTextureRect ( ) const
inline

Get the sub-rectangle of the texture displayed by the nine-patch.

Returns
Texture rectangle of the nine-patch in texture coordinates
See also
setTextureRect()
void gf::NinePatch::setAnchor ( Anchor  anchor)

Set the anchor origin of the entity.

Compute the origin of the entity based on the local bounds and the specified anchor. Internally, this function calls Transformable::setOrigin().

Parameters
anchorThe anchor of the entity
See also
getLocalBounds(), Transformable::setOrigin()
void gf::NinePatch::setColor ( const Color4f color)

Set the global color of the nine-patch.

This color is modulated (multiplied) with the nine-patch's texture. It can be used to colorize the nine-patch, or change its global opacity.

By default, the nine-patch's color is opaque white.

Parameters
colorNew color of the nine-patch
See also
getColor()
void gf::NinePatch::setHorizontalLimits ( float  left,
float  right 
)

Set the horizontal limits of the stretchable area.

The limits are given in normalized coordinates

Parameters
leftThe left limit
rightThe right limit
void gf::NinePatch::setLimits ( float  top,
float  bottom,
float  left,
float  right 
)

Set the limits of the stretchable area.

The limits are given in normalized coordinates

Parameters
topThe top limit
bottomThe bottom limit
leftThe left limit
rightThe right limit
void gf::NinePatch::setSize ( Vector2f  size)

Set the size of the stretched area.

Parameters
sizeThe size of the stretched area
void gf::NinePatch::setTexture ( const Texture texture,
bool  resetRect = false 
)

Change the source texture of the nine-patch.

The texture must exist as long as the nine-patch uses it. Indeed, the nine-patch doesn't store its own copy of the texture, but rather keeps a pointer to the one that you passed to this function. If the source texture is destroyed and the nine-patch tries to use it, the behavior is undefined.

If resetRect is true, the texture rect property of the nine-patch is automatically adjusted to the size of the new texture. If it is false, the texture rect is left unchanged.

Parameters
textureNew texture
resetRectShould the texture rect be reset to the size of the new texture?
See also
getTexture(), setTextureRect()
void gf::NinePatch::setTextureRect ( const RectF rect)

Set the sub-rectangle of the texture that the nine-patch will display.

The texture rect is useful when you don't want to display the whole texture, but rather a part of it. By default, the texture rect covers the entire texture.

The rectangle is given in texture coordinates, meaning that \((0,0)\) is the top left corner and \((1,1)\) is the bottom right corner.

Parameters
rectRectangle defining the region of the texture to display
See also
getTextureRect(), setTexture()
void gf::NinePatch::setVerticalLimits ( float  top,
float  bottom 
)

Set the vertical limits of the stretchable area.

The limits are given in normalized coordinates

Parameters
topThe top limit
bottomThe bottom limit
void gf::NinePatch::unsetTexture ( )

Unset the source texture of the nine-patch.

After a call to this function, the nine-patch has no source texture.

See also
setTexture()