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java.lang.Objectorg.gnu.glib.Struct
org.gnu.glib.GObject
org.gnu.gdk.GC
public class GC
All drawing operations in GDK take a GC argument. A graphics context encapsulates information about the way things are drawn, such as the foreground color or line width. By using graphics context, the number of arguments to each drawing call is reduced, and communication overhead is minimized.
Constructor Summary | |
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GC(Drawable drawable)
Create a new graphics context with default values. |
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GC(org.gnu.glib.Handle handle)
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GC(Window window)
Deprecated. |
Method Summary | |
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void |
copy(GC source)
Copy the set of values (settings) from another graphics context. |
int |
getClipXOrigin()
Getst he x origin of the clip mask. |
int |
getClipYOrigin()
Gets the y origin of the clip mask. |
Colormap |
getColormap()
Gets the colormap, if it exists. |
static GC |
getDefaultGC(Drawable d)
Convenience method to construct a new GC with default values. |
Screen |
getScreen()
Gets the Screen for which this GC was created. |
int |
getTsXOrigin()
Gets the x origin of the tile or stipple. |
int |
getTsYOrigin()
Gets the y origin of the tile or stipple. |
void |
offset(int xOffset,
int yOffset)
Offset attributes such as the clip and tile-stipple origins of the GC so that drawing at X - x_offset, y - y_offset with the offset GC has the same effect as drawing at x, y with the original GC. |
void |
setBackground(Color color)
Sets the background color for the graphics context. |
void |
setClipMask(Bitmap mask)
Sets the clip mask for a graphics context from a bitmap. |
void |
setClipOrigin(int x,
int y)
Sets the origin of the clip mask. |
void |
setClipRectangle(Rectangle rect)
Sets the clip mask for a graphics context from a rectangle. |
void |
setClipRegion(Region reg)
Sets the clip mask for a graphics context from a region. |
void |
setColormap(Colormap colormap)
Sets the colormap to the given colormap. |
void |
setDashes(int dashOffset,
int[] dashList)
Sets the way dashed-lines are drawn. |
void |
setExposures(boolean exposures)
Sets whether copying non-visible portions of a drawable using this graphics context generate exposure events for the corresponding regions of the destination drawable. |
void |
setFillMode(Fill mode)
Sets the fill mode for the graphic context. |
void |
setForeground(Color color)
Sets the foreground color for the graphics context. |
void |
setFunction(Function func)
Determines how the current pixel values and the pixel values being drawn are combined to produce the final pixel values. |
void |
setLineAttributes(int lineWidth,
LineStyle lineStyle,
CapStyle capStyle,
JoinStyle joinStyle)
Sets various attributes of how lines are drawn. |
void |
setOrigin(int x,
int y)
Sets the origin when using tiles or stipples with the GC. |
void |
setRGBBackground(Color color)
Sets the background color using an unallocated color. |
void |
setRGBForeground(Color color)
Sets the foreground color using an unallocated color. |
void |
setStipple(Pixmap stipple)
Sets the stipple bitmap for a graphics context. |
void |
setSubwindow(SubwindowMode mode)
Sets how drawing with this GC on a window will affect child windows. |
void |
setTile(Pixmap tile)
Sets the tile pixmap for the graphics context. |
Methods inherited from class org.gnu.glib.Struct |
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equals, getHandle, getNullHandle, hashCode |
Methods inherited from class java.lang.Object |
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getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public GC(org.gnu.glib.Handle handle)
public GC(Window window)
window
- public GC(Drawable drawable)
drawable
- The created GC must always be used with drawables of the same
depth as this one.Method Detail |
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public static GC getDefaultGC(Drawable d)
d
- public int getClipXOrigin()
public int getClipYOrigin()
public int getTsXOrigin()
public int getTsYOrigin()
public void setForeground(Color color)
public void setBackground(Color color)
public void setRGBForeground(Color color)
Calling this function for a GC without a colormap is an error.
public void setRGBBackground(Color color)
Calling this function for a GC without a colormap is an error.
public void setFunction(Function func)
public void setFillMode(Fill mode)
public void setTile(Pixmap tile)
public void setStipple(Pixmap stipple)
public void setOrigin(int x, int y)
public void setClipOrigin(int x, int y)
public void setClipRectangle(Rectangle rect)
public void setClipRegion(Region reg)
public void setClipMask(Bitmap mask)
public void setSubwindow(SubwindowMode mode)
public void setExposures(boolean exposures)
Drawable.drawDrawable(org.gnu.gdk.GC, org.gnu.gdk.Drawable, int, int, int, int, int, int)
public void setLineAttributes(int lineWidth, LineStyle lineStyle, CapStyle capStyle, JoinStyle joinStyle)
lineWidth
- the width of lines.lineStyle
- the dash-style for lines.capStyle
- the manner in which the ends of lines are drawn.joinStyle
- the manner in which lines are joined together.public void setDashes(int dashOffset, int[] dashList)
dashOffset
- the phase of the pattern for the dashed line-style you want to
seedashList
- the dash-list for the dashed line-style you want to set.setLineAttributes(int, org.gnu.gdk.LineStyle, org.gnu.gdk.CapStyle, org.gnu.gdk.JoinStyle)
public void offset(int xOffset, int yOffset)
xOffset
- amount by which to offset the GC in the X directionyOffset
- amount by which to offset the GC in the Y directionpublic void copy(GC source)
source
- the source graphics context.public void setColormap(Colormap colormap)
public Colormap getColormap()
public Screen getScreen()
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