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1 /* Tabs Widget for XEmacs.
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2 Copyright (C) 1999 Edward A. Falk
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Gcs 1.7 */
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22
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23
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24 #ifndef GCS_H
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25 #define GCS_H
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26
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27 /* Overview of functions provided here:
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28 *
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29 * AllocFgGC()
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30 * Given a foreground pixel & a font, return an appropriate GC
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31 *
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32 * AllocBackgroundGC()
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33 * Given a widget, return a GC for painting the background color
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34 *
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35 * AllocShadeGC()
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36 * Given foreground, background, a contrast value & be_nice_to_colormap
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37 * flag, return a GC suitable for rendering in an intermediate color,
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38 * as determined by contrast. May return a dither pattern or a
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39 * solid color, as appropriate.
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40 *
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41 * Contrast 0 = background color, 100 = foreground color. It is legal
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42 * for contrast to be more than 100 or less than 0.
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43 *
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44 * AllocGreyGC()
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45 * Given widget, foreground, font, contrast & be_nice_to_colormap,
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46 * return a shade GC (see above) based on foreground and widget
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47 * background.
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48 *
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49 * AllocTopShadowGC()
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50 * Given widget, contrast & be_nice_to_colormap, return a GC suitable
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51 * for rendering the top shadow.
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52 *
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53 * Contrast 0 = use background pixel. Contrast > 0 = use brighter
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54 * colors.
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55 *
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56 * AllocBotShadowGC()
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57 * Given widget, contrast & be_nice_to_colormap, return a GC suitable
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58 * for rendering the bottom shadow.
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59 *
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60 * Contrast 0 = use background pixel. Contrast > 0 = use darker
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61 * colors.
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62 *
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63 * AllocArmShadowGC()
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64 * Given widget, contrast & be_nice_to_colormap, return a GC suitable
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65 * for rendering the "armed" shadow.
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66 *
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67 * Contrast 0 = use background pixel. Contrast > 0 = use darker
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68 * colors.
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69 *
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70 * AllocShadowPixel()
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71 * Given a widget & scale factor, allocate & return a color darker
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72 * or lighter than the background pixel, as determined by scale.
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73 *
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74 * Scale 100 = use background pixel. Scale > 100 = brighter color,
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75 * Scale < 100 = darker color.
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76 *
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77 * AllocGreyPixel()
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78 * Given two pixel values and scale factor, allocate & return a
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79 * pixel value between them, according to scale.
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80 *
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81 * Scale == 0: background color
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82 * Scale == 100: foreground color
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83 * 0<Scale<100: intermediate color
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84 * Scale > 100: more foreground
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85 * Scale < 0: more background
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86 *
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87 *
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88 * AllocGreyPixelC()
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89 * Given two color values and scale factor, allocate & return a
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90 * pixel value between them, according to scale.
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91 *
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92 * Scale == 0: background color
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93 * Scale == 100: foreground color
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94 * 0<Scale<100: intermediate color
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95 * Scale > 100: more foreground
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96 * Scale < 0: more background
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97 *
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98 * Draw3dBox()
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99 * Given box dimensions, shadow width, top shadow GC & bottom shadow GC,
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100 * draw a 3-d box.
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101 */
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102
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103 #if NeedFunctionPrototypes
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104
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105 extern GC AllocFgGC( Widget w, Pixel fg, Font font) ;
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106 extern GC AllocBackgroundGC( Widget w, Font font) ;
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107 extern GC AllocShadeGC( Widget w, Pixel fg, Pixel bg, Font,
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108 int contrast, Bool ) ;
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109 extern GC AllocGreyGC( Widget w, Pixel fg, Font, int, Bool ) ;
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110 extern GC AllocTopShadowGC( Widget w, int contrast, int ) ;
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111 extern GC AllocBotShadowGC( Widget w, int contrast, int ) ;
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112 extern GC AllocArmGC( Widget w, int contrast, int) ;
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113 extern Pixel AllocShadowPixel(Widget, int scale) ;
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114 extern Pixel AllocGreyPixel(Widget, Pixel fg, Pixel bg, int scale) ;
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115 extern Pixel AllocGreyPixelC(Widget, XColor *fg, XColor *bg, int scale) ;
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116 extern void Draw3dBox(Widget w, int x, int y, int wid, int hgt, int s,
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117 GC topgc, GC botgc) ;
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118
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119 #else
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120
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121 extern GC AllocFgGC() ;
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122 extern GC AllocBackgroundGC() ;
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123 extern GC AllocShadeGC() ;
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124 extern GC AllocGreyGC() ;
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125 extern GC AllocTopShadowGC() ;
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126 extern GC AllocBotShadowGC() ;
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127 extern GC AllocArmGC() ;
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128 extern Pixel AllocShadowPixel() ;
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129 extern Pixel AllocGreyPixel() ;
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130 extern Pixel AllocGreyPixelC() ;
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131 extern void Draw3dBox() ;
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132
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133 #endif
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134
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135 #endif /* GCS_H */
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