src/fl_labeltype.cxx

   1 //
   2 // "$Id: fl_labeltype.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Label drawing routines for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 1998-2010 by Bill Spitzak and others.
   7 //
   8 // This library is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU Library General Public
  10 // License as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // Library General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU Library General Public
  19 // License along with this library; if not, write to the Free Software
  20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21 // USA.
  22 //
  23 // Please report all bugs and problems on the following page:
  24 //
  25 //     http://www.fltk.org/str.php
  26 //
  27
  28 // Drawing code for the (one) common label types.
  29 // Other label types (symbols) are in their own source files
  30 // to avoid linking if not used.
  31
  32 #include <FL/Fl.H>
  33 #include <FL/Fl_Widget.H>
  34 #include <FL/Fl_Group.H>
  35 #include <FL/fl_draw.H>
  36 #include <FL/Fl_Image.H>
  37
  38 void
  39 fl_no_label(const Fl_Label*,int,int,int,int,Fl_Align) {}
  40
  41 void
  42 fl_normal_label(const Fl_Label* o, int X, int Y, int W, int H, Fl_Align align)
  43 {
  44   fl_font(o->font, o->size);
  45   fl_color((Fl_Color)o->color);
  46   fl_draw(o->value, X, Y, W, H, align, o->image);
  47 }
  48
  49 void
  50 fl_normal_measure(const Fl_Label* o, int& W, int& H) {
  51   fl_font(o->font, o->size);
  52   fl_measure(o->value, W, H);
  53   if (o->image) {
  54     if (o->image->w() > W) W = o->image->w();
  55     H += o->image->h();
  56   }
  57 }
  58
  59 #define MAX_LABELTYPE 16
  60
  61 static Fl_Label_Draw_F* table[MAX_LABELTYPE] = {
  62   fl_normal_label,
  63   fl_no_label,
  64   fl_normal_label,      // _FL_SHADOW_LABEL,
  65   fl_normal_label,      // _FL_ENGRAVED_LABEL,
  66   fl_normal_label,      // _FL_EMBOSSED_LABEL,
  67   fl_no_label,          // _FL_MULTI_LABEL,
  68   fl_no_label,          // _FL_ICON_LABEL,
  69   // FL_FREE_LABELTYPE+n:
  70   fl_no_label, fl_no_label, fl_no_label,
  71   fl_no_label, fl_no_label, fl_no_label,
  72   fl_no_label, fl_no_label, fl_no_label
  73 };
  74
  75 static Fl_Label_Measure_F* measure[MAX_LABELTYPE];
  76
  77 /** Sets the functions to call to draw and measure a specific labeltype. */
  78 void Fl::set_labeltype(Fl_Labeltype t,Fl_Label_Draw_F* f,Fl_Label_Measure_F*m)
  79 {
  80   table[t] = f; measure[t] = m;
  81 }
  82
  83 ////////////////////////////////////////////////////////////////
  84
  85 /** Draws a label with arbitrary alignment in an arbitrary box. */
  86 void Fl_Label::draw(int X, int Y, int W, int H, Fl_Align align) const {
  87   if (!value && !image) return;
  88   table[type](this, X, Y, W, H, align);
  89 }
  90 /**
  91     Measures the size of the label.
  92     \param[in,out] W, H : this is the requested size for the label text plus image;
  93          on return, this will contain the size needed to fit the label
  94 */
  95 void Fl_Label::measure(int& W, int& H) const {
  96   if (!value && !image) {
  97     W = H = 0;
  98     return;
  99   }
 100
 101   Fl_Label_Measure_F* f = ::measure[type]; if (!f) f = fl_normal_measure;
 102   f(this, W, H);
 103 }
 104
 105 /** Draws the widget's label at the defined label position.
 106     This is the normal call for a widget's draw() method.
 107  */
 108 void Fl_Widget::draw_label() const {
 109   int X = x_+Fl::box_dx(box());
 110   int W = w_-Fl::box_dw(box());
 111   if (W > 11 && align()&(FL_ALIGN_LEFT|FL_ALIGN_RIGHT)) {X += 3; W -= 6;}
 112   draw_label(X, y_+Fl::box_dy(box()), W, h_-Fl::box_dh(box()));
 113 }
 114
 115 /** Draws the label in an arbitrary bounding box.
 116     draw() can use this instead of draw_label(void) to change the bounding box
 117  */
 118 void Fl_Widget::draw_label(int X, int Y, int W, int H) const {
 119   // quit if we are not drawing a label inside the widget:
 120   if ((align()&15) && !(align() & FL_ALIGN_INSIDE)) return;
 121   draw_label(X,Y,W,H,align());
 122 }
 123
 124 /** Draws the label in an arbitrary bounding box with an arbitrary alignment.
 125     Anybody can call this to force the label to draw anywhere.
 126  */
 127 void Fl_Widget::draw_label(int X, int Y, int W, int H, Fl_Align a) const {
 128   if (flags()&SHORTCUT_LABEL) fl_draw_shortcut = 1;
 129   Fl_Label l1 = label_;
 130   if (!active_r()) {
 131     l1.color = fl_inactive((Fl_Color)l1.color);
 132     if (l1.deimage) l1.image = l1.deimage;
 133   }
 134   l1.draw(X,Y,W,H,a);
 135   fl_draw_shortcut = 0;
 136 }
 137
 138 // include these vars here so they can be referenced without including
 139 // Fl_Input_ code:
 140 #include <FL/Fl_Input_.H>
 141
 142 //
 143 // End of "$Id: fl_labeltype.cxx 7903 2010-11-28 21:06:39Z matt $".
 144 //