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Category:gc

359 bytes added, 15:43, 17 December 2013
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"'''gc'''" is the '''Graphics Context'''.
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== Quick Overview==
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'''gc''' is the Nspire's ''graphic context''. A graphics context is a module that has a handle to the script’s graphics output window and a library of graphics routines that are used to draw on the window. A graphics context is supplied to the script ”on.paint” event handler each time the window needs to be redrawn. The graphics context employs a pixel-based coordinate system with the origin in the upper left corner of the drawing window.
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*'''[[gc:clipRect]]'''(op, x, y, width, height) - Sets the clipping rectangle for subsequent graphics operations.
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*'''[[gc:drawArc]]'''(x, y, width, height, start angle, finish angle).
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*'''[[gc:drawImage]]'''(image,x,y) First argument in format “[[TI.Image]]”, x and y the coords.
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*'''[[gc:drawLine]]'''(xstart, ystart, xend, yend) Draws a line starting at the point (xstart,ystart) and ending at the point (xend, yend)
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*'''[[gc:drawPolyLine]]'''(int list1 [,int list2, .., int listN]) Draws a shape from a list contaning successively the x and y coordinates of each point the line have to draw.
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*'''[[gc:drawRect]]'''(x, y, xwidth, yheight) Draws a rectangle at (x,y) with the “x” side being “xwidth” long and the “y” side being “yheight” long
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*'''[[gc:drawString]]'''(string, x, y, position) position is the string’s anchor point and can be "baseline", “bottom”, “middle”, or “top”.
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*'''[[gc:fillArc]]'''(x, y, width, height, start angle, finish angle) see [[gc:drawArc]]
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*'''[[gc:fillPolygon]]'''(int list1 [,int list2, .., int listN]) see [[gc:drawPolyLine]]
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*'''[[gc:fillRect]]'''(x, y, width, height) see [[gc:drawRect]]
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*'''[[gc:getStringHeight]]'''(string) - Returns the string's height.
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*'''[[gc:getStringWidth]]'''(string) - Returns the string's width
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*'''[[gc:setAlpha]]'''(alpha) - where alpha is an integer between 0 and 255. Sets the transparency. ''Not available anymore''
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*'''[[gc:setColorRGB]]'''(red, green, blue) RGB values are integers, from 0 to 255.
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*'''[[gc:setFont]]'''(font, type, size), with font : {“sansserif”, "serif", ..}, type {“b”, “r”, “i”}, size(int)
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*'''[[gc:setPen]]'''(thickness, smoothness) : thickness {“thin”, “medium”, "thick"}, smoothness {“smooth”, "dotted", "dashed"}
 
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All these functions are called like that : '''gc:drawString'''(...)
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*'''[[begin]]''' -
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*'''[[clipRect]]'''(?, x, y, width, height) -
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*'''[[drawArc]]'''(x, y, width, height, start angle, finish angle).
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*'''[[drawImage]]'''(image,x,y) First argument in format “[[TI.Image]]”, x and y the coords.
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*'''[[drawLine]]'''(xstart, ystart, xend, yend) Draws a line starting at the point (xstart,ystart) and ending at the point (xend, yend)
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*'''[[drawPolyLine]]'''(int list1 [,int list2, .., int listN]) Draws a shape from a list contaning successively the x and y coordinates of each point the line have to draw.
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*'''[[drawRect]]'''(x, y, xwidth, yheight) Draws a rectangle at (x,y) with the “x” side being “xwidth” long and the “y” side being “yheight” long
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*'''[[drawString]]'''(string, x, y, PositionString) PositionString is the string’s anchor point and can be "baseline", “bottom”, “middle”, or “top”.
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*'''[[fillArc]]'''(x, y, width, height, start angle, finish angle) see [[drawArc]]
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*'''[[fillPolygon]]'''(int list1 [,int list2, .., int listN]) see [[drawPolyLine]]
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*'''[[fillRect]]'''(x, y, width, height) see [[drawRect]]
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*'''[[finish]]''' -
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*'''[[getStringHeight]]'''(string) - Returns the string's height.
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*'''[[getStringWidth]]'''(string) - Returns the string's width
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*'''[[isColorDisplay]]''' Bool (Read-only) Returns 1 if the device has a color display, 0 if not.
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*'''[[setAlpha]]'''(alpha) - where alpha is an integer between 0 and 255. Sets the transparency.
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*'''[[setColorRGB]]'''(red, green, blue) RGB values are integers, from 0 to 255.
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*'''[[setFont]]'''(font, type, size), with font : {“sansserif”, "serif", ..}, type {“b”, “r”, “i”}, size(int)
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*'''[[setPen]]'''(thickness, smoothness) : thickness {“thin”, “medium”, "thick"}, smoothness {“smooth”, "dotted", "dashed"}
 

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