1 | // |
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2 | // "$Id$" |
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3 | // |
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4 | // Tab widget for the Fast Light Tool Kit (FLTK). |
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5 | // |
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6 | // Copyright 1998-2005 by Bill Spitzak and others. |
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7 | // |
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8 | // This library is free software; you can redistribute it and/or |
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9 | // modify it under the terms of the GNU Library General Public |
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10 | // License as published by the Free Software Foundation; either |
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11 | // version 2 of the License, or (at your option) any later version. |
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12 | // |
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13 | // This library is distributed in the hope that it will be useful, |
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14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | // Library General Public License for more details. |
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17 | // |
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18 | // You should have received a copy of the GNU Library General Public |
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19 | // License along with this library; if not, write to the Free Software |
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20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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21 | // USA. |
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22 | // |
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23 | // Please report all bugs and problems on the following page: |
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24 | // |
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25 | // http://www.fltk.org/str.php |
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26 | // |
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27 | |
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28 | // This is the "file card tabs" interface to allow you to put lots and lots |
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29 | // of buttons and switches in a panel, as popularized by many toolkits. |
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30 | |
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31 | // Each child widget is a card, and it's label() is printed on the card tab. |
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32 | // Clicking the tab makes that card visible. |
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33 | |
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34 | #include <stdio.h> |
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35 | #include <FL/Fl.H> |
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36 | #include <FL/Fl_Tabs.H> |
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37 | #include <FL/fl_draw.H> |
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38 | #include <FL/Fl_Tooltip.H> |
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39 | |
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40 | #define BORDER 2 |
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41 | #define EXTRASPACE 10 |
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42 | |
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43 | // return the left edges of each tab (plus a fake left edge for a tab |
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44 | // past the right-hand one). These position are actually of the left |
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45 | // edge of the slope. They are either seperated by the correct distance |
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46 | // or by EXTRASPACE or by zero. |
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47 | // Return value is the index of the selected item. |
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48 | |
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49 | int Fl_Tabs::tab_positions(int* p, int* wp) { |
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50 | int selected = 0; |
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51 | Fl_Widget*const* a = array(); |
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52 | int i; |
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53 | char prev_draw_shortcut = fl_draw_shortcut; |
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54 | fl_draw_shortcut = 1; |
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55 | |
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56 | p[0] = Fl::box_dx(box()); |
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57 | for (i=0; i<children(); i++) { |
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58 | Fl_Widget* o = *a++; |
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59 | if (o->visible()) selected = i; |
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60 | |
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61 | int wt = 0; int ht = 0; |
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62 | o->measure_label(wt,ht); |
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63 | |
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64 | wp[i] = wt+EXTRASPACE; |
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65 | p[i+1] = p[i]+wp[i]+BORDER; |
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66 | } |
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67 | fl_draw_shortcut = prev_draw_shortcut; |
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68 | |
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69 | int r = w(); |
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70 | if (p[i] <= r) return selected; |
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71 | // uh oh, they are too big: |
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72 | // pack them against right edge: |
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73 | p[i] = r; |
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74 | for (i = children(); i--;) { |
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75 | int l = r-wp[i]; |
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76 | if (p[i+1] < l) l = p[i+1]; |
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77 | if (p[i] <= l) break; |
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78 | p[i] = l; |
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79 | r -= EXTRASPACE; |
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80 | } |
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81 | // pack them against left edge and truncate width if they still don't fit: |
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82 | for (i = 0; i<children(); i++) { |
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83 | if (p[i] >= i*EXTRASPACE) break; |
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84 | p[i] = i*EXTRASPACE; |
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85 | int W = w()-1-EXTRASPACE*(children()-i) - p[i]; |
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86 | if (wp[i] > W) wp[i] = W; |
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87 | } |
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88 | // adjust edges according to visiblity: |
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89 | for (i = children(); i > selected; i--) { |
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90 | p[i] = p[i-1]+wp[i-1]; |
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91 | } |
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92 | return selected; |
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93 | } |
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94 | |
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95 | // return space needed for tabs. Negative to put them on the bottom: |
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96 | int Fl_Tabs::tab_height() { |
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97 | int H = h(); |
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98 | int H2 = y(); |
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99 | Fl_Widget*const* a = array(); |
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100 | for (int i=children(); i--;) { |
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101 | Fl_Widget* o = *a++; |
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102 | if (o->y() < y()+H) H = o->y()-y(); |
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103 | if (o->y()+o->h() > H2) H2 = o->y()+o->h(); |
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104 | } |
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105 | H2 = y()+h()-H2; |
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106 | if (H2 > H) return (H2 <= 0) ? 0 : -H2; |
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107 | else return (H <= 0) ? 0 : H; |
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108 | } |
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109 | |
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110 | // this is used by fluid to pick tabs: |
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111 | Fl_Widget *Fl_Tabs::which(int event_x, int event_y) { |
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112 | int H = tab_height(); |
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113 | if (H < 0) { |
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114 | if (event_y > y()+h() || event_y < y()+h()+H) return 0; |
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115 | } else { |
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116 | if (event_y > y()+H || event_y < y()) return 0; |
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117 | } |
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118 | if (event_x < x()) return 0; |
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119 | int p[128], wp[128]; |
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120 | tab_positions(p, wp); |
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121 | for (int i=0; i<children(); i++) { |
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122 | if (event_x < x()+p[i+1]) return child(i); |
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123 | } |
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124 | return 0; |
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125 | } |
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126 | |
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127 | void Fl_Tabs::redraw_tabs() |
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128 | { |
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129 | int H = tab_height(); |
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130 | if (H >= 0) { |
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131 | H += Fl::box_dy(box()); |
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132 | damage(FL_DAMAGE_SCROLL, x(), y(), w(), H); |
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133 | } else { |
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134 | H = Fl::box_dy(box()) - H; |
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135 | damage(FL_DAMAGE_SCROLL, x(), y() + h() - H, w(), H); |
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136 | } |
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137 | } |
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138 | |
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139 | int Fl_Tabs::handle(int event) { |
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140 | |
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141 | Fl_Widget *o; |
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142 | int i; |
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143 | |
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144 | switch (event) { |
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145 | |
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146 | case FL_PUSH: { |
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147 | int H = tab_height(); |
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148 | if (H >= 0) { |
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149 | if (Fl::event_y() > y()+H) return Fl_Group::handle(event); |
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150 | } else { |
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151 | if (Fl::event_y() < y()+h()+H) return Fl_Group::handle(event); |
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152 | }} |
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153 | case FL_DRAG: |
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154 | case FL_RELEASE: |
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155 | o = which(Fl::event_x(), Fl::event_y()); |
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156 | if (event == FL_RELEASE) { |
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157 | push(0); |
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158 | if (o && Fl::visible_focus() && Fl::focus()!=this) { |
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159 | Fl::focus(this); |
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160 | redraw_tabs(); |
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161 | } |
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162 | if (o && value(o)) { |
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163 | set_changed(); |
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164 | do_callback(); |
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165 | } |
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166 | Fl_Tooltip::current(o); |
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167 | } else { |
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168 | push(o); |
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169 | } |
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170 | return 1; |
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171 | case FL_MOVE: { |
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172 | int ret = Fl_Group::handle(event); |
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173 | Fl_Widget *o = Fl_Tooltip::current(), *n = o; |
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174 | int H = tab_height(); |
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175 | if ( (H>=0) && (Fl::event_y()>y()+H) ) |
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176 | return ret; |
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177 | else if ( (H<0) && (Fl::event_y() < y()+h()+H) ) |
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178 | return ret; |
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179 | else { |
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180 | n = which(Fl::event_x(), Fl::event_y()); |
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181 | if (!n) n = this; |
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182 | } |
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183 | if (n!=o) |
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184 | Fl_Tooltip::enter(n); |
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185 | return ret; } |
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186 | case FL_FOCUS: |
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187 | case FL_UNFOCUS: |
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188 | if (!Fl::visible_focus()) return Fl_Group::handle(event); |
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189 | if (Fl::event() == FL_RELEASE || |
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190 | Fl::event() == FL_SHORTCUT || |
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191 | Fl::event() == FL_KEYBOARD || |
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192 | Fl::event() == FL_FOCUS || |
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193 | Fl::event() == FL_UNFOCUS) { |
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194 | redraw_tabs(); |
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195 | if (Fl::event() == FL_FOCUS || Fl::event() == FL_UNFOCUS) return 0; |
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196 | else return 1; |
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197 | } else return Fl_Group::handle(event); |
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198 | case FL_KEYBOARD: |
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199 | switch (Fl::event_key()) { |
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200 | case FL_Left: |
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201 | if (child(0)->visible()) return 0; |
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202 | for (i = 1; i < children(); i ++) |
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203 | if (child(i)->visible()) break; |
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204 | value(child(i - 1)); |
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205 | set_changed(); |
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206 | do_callback(); |
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207 | return 1; |
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208 | case FL_Right: |
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209 | if (child(children() - 1)->visible()) return 0; |
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210 | for (i = 0; i < children(); i ++) |
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211 | if (child(i)->visible()) break; |
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212 | value(child(i + 1)); |
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213 | set_changed(); |
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214 | do_callback(); |
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215 | return 1; |
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216 | case FL_Down: |
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217 | redraw(); |
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218 | return Fl_Group::handle(FL_FOCUS); |
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219 | default: |
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220 | break; |
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221 | } |
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222 | return Fl_Group::handle(event); |
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223 | case FL_SHORTCUT: |
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224 | for (i = 0; i < children(); ++i) { |
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225 | Fl_Widget *c = child(i); |
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226 | if (c->test_shortcut(c->label())) { |
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227 | char sc = !c->visible(); |
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228 | value(c); |
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229 | if (sc) set_changed(); |
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230 | do_callback(); |
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231 | return 1; |
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232 | } |
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233 | } |
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234 | return Fl_Group::handle(event); |
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235 | case FL_SHOW: |
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236 | value(); // update visibilities and fall through |
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237 | default: |
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238 | return Fl_Group::handle(event); |
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239 | |
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240 | } |
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241 | } |
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242 | |
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243 | int Fl_Tabs::push(Fl_Widget *o) { |
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244 | if (push_ == o) return 0; |
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245 | if (push_ && !push_->visible() || o && !o->visible()) |
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246 | redraw_tabs(); |
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247 | push_ = o; |
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248 | return 1; |
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249 | } |
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250 | |
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251 | // The value() is the first visible child (or the last child if none |
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252 | // are visible) and this also hides any other children. |
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253 | // This allows the tabs to be deleted, moved to other groups, and |
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254 | // show()/hide() called without it screwing up. |
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255 | Fl_Widget* Fl_Tabs::value() { |
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256 | Fl_Widget* v = 0; |
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257 | Fl_Widget*const* a = array(); |
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258 | for (int i=children(); i--;) { |
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259 | Fl_Widget* o = *a++; |
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260 | if (v) o->hide(); |
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261 | else if (o->visible()) v = o; |
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262 | else if (!i) {o->show(); v = o;} |
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263 | } |
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264 | return v; |
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265 | } |
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266 | |
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267 | // Setting the value hides all other children, and makes this one |
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268 | // visible, iff it is really a child: |
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269 | int Fl_Tabs::value(Fl_Widget *newvalue) { |
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270 | Fl_Widget*const* a = array(); |
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271 | int ret = 0; |
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272 | for (int i=children(); i--;) { |
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273 | Fl_Widget* o = *a++; |
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274 | if (o == newvalue) { |
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275 | if (!o->visible()) ret = 1; |
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276 | o->show(); |
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277 | } else { |
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278 | o->hide(); |
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279 | } |
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280 | } |
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281 | return ret; |
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282 | } |
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283 | |
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284 | enum {LEFT, RIGHT, SELECTED}; |
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285 | |
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286 | void Fl_Tabs::draw() { |
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287 | Fl_Widget *v = value(); |
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288 | int H = tab_height(); |
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289 | |
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290 | if (damage() & FL_DAMAGE_ALL) { // redraw the entire thing: |
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291 | Fl_Color c = v ? v->color() : color(); |
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292 | |
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293 | draw_box(box(), x(), y()+(H>=0?H:0), w(), h()-(H>=0?H:-H), c); |
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294 | |
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295 | if (selection_color() != c) { |
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296 | // Draw the top 5 lines of the tab pane in the selection color so |
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297 | // that the user knows which tab is selected... |
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298 | if (H >= 0) fl_push_clip(x(), y() + H, w(), 5); |
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299 | else fl_push_clip(x(), y() + h() - H - 4, w(), 5); |
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300 | |
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301 | draw_box(box(), x(), y()+(H>=0?H:0), w(), h()-(H>=0?H:-H), |
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302 | selection_color()); |
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303 | |
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304 | fl_pop_clip(); |
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305 | } |
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306 | if (v) draw_child(*v); |
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307 | } else { // redraw the child |
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308 | if (v) update_child(*v); |
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309 | } |
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310 | if (damage() & (FL_DAMAGE_SCROLL|FL_DAMAGE_ALL)) { |
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311 | int p[128]; int wp[128]; |
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312 | int selected = tab_positions(p,wp); |
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313 | int i; |
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314 | Fl_Widget*const* a = array(); |
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315 | for (i=0; i<selected; i++) |
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316 | draw_tab(x()+p[i], x()+p[i+1], wp[i], H, a[i], LEFT); |
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317 | for (i=children()-1; i > selected; i--) |
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318 | draw_tab(x()+p[i], x()+p[i+1], wp[i], H, a[i], RIGHT); |
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319 | if (v) { |
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320 | i = selected; |
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321 | draw_tab(x()+p[i], x()+p[i+1], wp[i], H, a[i], SELECTED); |
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322 | } |
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323 | } |
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324 | } |
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325 | |
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326 | void Fl_Tabs::draw_tab(int x1, int x2, int W, int H, Fl_Widget* o, int what) { |
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327 | int sel = (what == SELECTED); |
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328 | int dh = Fl::box_dh(box()); |
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329 | int dy = Fl::box_dy(box()); |
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330 | char prev_draw_shortcut = fl_draw_shortcut; |
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331 | fl_draw_shortcut = 1; |
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332 | |
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333 | Fl_Boxtype bt = (o==push_ &&!sel) ? fl_down(box()) : box(); |
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334 | |
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335 | // compute offsets to make selected tab look bigger |
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336 | int yofs = sel ? 0 : BORDER; |
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337 | |
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338 | if ((x2 < x1+W) && what == RIGHT) x1 = x2 - W; |
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339 | |
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340 | if (H >= 0) { |
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341 | if (sel) fl_clip(x1, y(), x2 - x1, H + dh - dy); |
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342 | else fl_clip(x1, y(), x2 - x1, H); |
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343 | |
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344 | H += dh; |
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345 | |
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346 | Fl_Color c = sel ? selection_color() : o->selection_color(); |
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347 | |
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348 | draw_box(bt, x1, y() + yofs, W, H + 10 - yofs, c); |
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349 | |
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350 | // Save the previous label color |
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351 | Fl_Color oc = o->labelcolor(); |
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352 | |
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353 | // Draw the label using the current color... |
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354 | o->labelcolor(sel ? labelcolor() : o->labelcolor()); |
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355 | o->draw_label(x1, y() + yofs, W, H - yofs, FL_ALIGN_CENTER); |
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356 | |
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357 | // Restore the original label color... |
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358 | o->labelcolor(oc); |
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359 | |
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360 | if (Fl::focus() == this && o->visible()) |
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361 | draw_focus(box(), x1, y(), W, H); |
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362 | |
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363 | fl_pop_clip(); |
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364 | } else { |
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365 | H = -H; |
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366 | |
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367 | if (sel) fl_clip(x1, y() + h() - H - dy, x2 - x1, H + dy); |
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368 | else fl_clip(x1, y() + h() - H, x2 - x1, H); |
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369 | |
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370 | H += dh; |
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371 | |
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372 | Fl_Color c = sel ? selection_color() : o->selection_color(); |
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373 | |
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374 | draw_box(bt, x1, y() + h() - H - 10, W, H + 10 - yofs, c); |
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375 | |
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376 | // Save the previous label color |
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377 | Fl_Color oc = o->labelcolor(); |
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378 | |
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379 | // Draw the label using the current color... |
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380 | o->labelcolor(sel ? labelcolor() : o->labelcolor()); |
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381 | o->draw_label(x1, y() + h() - H, W, H - yofs, FL_ALIGN_CENTER); |
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382 | |
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383 | // Restore the original label color... |
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384 | o->labelcolor(oc); |
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385 | |
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386 | if (Fl::focus() == this && o->visible()) |
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387 | draw_focus(box(), x1, y() + h() - H, W, H); |
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388 | |
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389 | fl_pop_clip(); |
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390 | } |
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391 | fl_draw_shortcut = prev_draw_shortcut; |
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392 | } |
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393 | |
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394 | Fl_Tabs::Fl_Tabs(int X,int Y,int W, int H, const char *l) : |
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395 | Fl_Group(X,Y,W,H,l) |
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396 | { |
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397 | box(FL_THIN_UP_BOX); |
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398 | push_ = 0; |
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399 | } |
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400 | |
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401 | // |
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402 | // End of "$Id$". |
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403 | // |
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