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Diffstat (limited to 'documentation/drawing.html')
| -rw-r--r-- | documentation/drawing.html | 45 |
1 files changed, 7 insertions, 38 deletions
diff --git a/documentation/drawing.html b/documentation/drawing.html index 75ad5d52e..49c973a6e 100644 --- a/documentation/drawing.html +++ b/documentation/drawing.html @@ -18,9 +18,7 @@ identified by an 8-bit index that is stored in the widget's <TT>box()</TT> <LI>You can call <A href=Fl_Window.html#Fl_Window.make_current><TT> Fl_Window::make_current()</TT></A> to do incremental update of a widget. Use <A href=Fl_Widget.html#Fl_Widget.window><TT> -Fl_Widget::window()</TT></A> to find the window. <I>Under X this only -works for the base <TT>Fl_Window</TT> class, not for double buffered, -overlay, or OpenGL windows!</I></LI> +Fl_Widget::window()</TT></A> to find the window.</LI> </UL> <H2>FLTK Drawing Functions</H2> To use the drawing functions you must first include the <TT> @@ -33,7 +31,6 @@ drawing functions: <LI><A href=#complex>Complex Shapes</A></LI> <LI><A href=#text>Text</A></LI> <LI><A href=#images>Images</A></LI> -<LI><A href=#cursor>Cursor</A></LI> <LI><A href=#overlay>Overlay</A></LI> </UL> <H3><A name=clipping>Clipping</A></H3> @@ -72,7 +69,7 @@ is completely outside the region. is <I>not</I> the X or WIN32 pixel, it is an index into an internal table! The table provides several general colors, a 24-entry gray ramp, and a 5x8x5 color cube. All of these are named with -symbols in <A href=enumerations.html#enumerations> +symbols in <A href=enumerations.html#colors> <TT><FL/Enumerations.H></TT></A>. <P>For colormapped displays, a color cell will be allocated out of <TT> fl_colormap</TT> the first time you use a color. If the colormap fills @@ -144,9 +141,9 @@ w - 1</TT> and <TT>h - 1</TT>. </P> transformations. The functionality matches that found in Adobe® PostScript<SUP>TM</SUP>. The exact pixels that are filled is less defined than for the previous calls so that FLTK can take advantage of drawing -hardware. The transformed vertices are rounded to integers before -drawing the line segments. This severely limits the accuracy of these -functions for complex graphics. Use OpenGL when greater accuracy +hardware. On both X and WIN32 the transformed vertices are rounded to integers before +drawing the line segments: this severely limits the accuracy of these +functions for complex graphics, so use OpenGL when greater accuracy and/or performance is required. <H4>void fl_push_matrix() <BR> void fl_pop_matrix()</H4> @@ -249,9 +246,8 @@ value points at a static buffer that is overwritten with each call. above. You may call this outside a draw context if necessary to call <TT> fl_width()</TT>, but on X this will open the display. <P>The font is identified by a <TT>face</TT> and a <TT>size</TT>. The -size of the font is measured in <TT>pixels</TT> (i.e. it is not -"resolution [in]dependent"). Lines should be spaced <TT>size</TT> - pixels apart (or more). </P> +size of the font is measured in <TT>pixels</TT> (not "points"). Lines + should be spaced <TT>size</TT> pixels apart (or more). </P> <P>The <TT>face</TT> is an index into an internal table. Initially only the first 16 faces are filled in. There are symbolic names for them: <TT>FL_HELVETICA</TT>, <TT>FL_TIMES</TT>, <TT>FL_COURIER</TT>, @@ -263,33 +259,6 @@ since it stores the index as a byte. </P> <BR> int fl_size()</H4> Returns the face and size set by the most recent call to <TT> fl_font(a,b)</TT>. This can be used to save/restore the font. -<H3><A name=cursor>Cursor</A></H3> -<H4>void fl_cursor(Fl_Cursor, Fl_Color = FL_WHITE, Fl_Color = FL_BLACK)</H4> - Change the cursor. Depending on the system this may affect the cursor -everywhere, or only when it is pointing at the window that is current -when you call this. For portability you should change the cursor back -to the default in response to <TT>FL_LEAVE</TT> events. -<P>The type <TT>Fl_Cursor</TT> is an enumeration defined in <A href=enumerations.html#enumerations> -<TT><Enumerations.H></TT></A>. The double-headed arrows are bitmaps -provided by FLTK on X, the others are provided by system-defined -cursors. Under X you can get any XC_cursor value by passing <TT> -Fl_Cursor((XC_foo/2)+1)</TT>. </P> -<P>The following standard cursors are available: </P> -<UL> -<LI><TT>FL_CURSOR_DEFAULT</TT> - the default cursor, usually an arrow </LI> -<LI><TT>FL_CURSOR_ARROW</TT> - an arrow pointer </LI> -<LI><TT>FL_CURSOR_CROSS</TT> - crosshair </LI> -<LI><TT>FL_CURSOR_WAIT</TT> - watch or hourglass </LI> -<LI><TT>FL_CURSOR_INSERT</TT> - I-beam </LI> -<LI><TT>FL_CURSOR_HAND</TT> - hand (uparrow on MSWindows) </LI> -<LI><TT>FL_CURSOR_HELP</TT> - question mark </LI> -<LI><TT>FL_CURSOR_MOVE</TT> - 4-pointed arrow </LI> -<LI><TT>FL_CURSOR_NS</TT> - up/down arrow </LI> -<LI><TT>FL_CURSOR_WE</TT> - left/right arrow </LI> -<LI><TT>FL_CURSOR_NWSE</TT> - diagonal arrow </LI> -<LI><TT>FL_CURSOR_NESW</TT> - diagonal arrow </LI> -<LI><TT>FL_CURSOR_NONE</TT> - invisible </LI> -</UL> <H3><A name=overlay>Overlays</A></H3> <H4>void fl_overlay_rect(int x, int y, int w, int h) <BR> void fl_overlay_clear()</H4> |