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
fl_no_label(const Fl_Label *,int,int,int,int,Fl_Align)39 fl_no_label(const Fl_Label*,int,int,int,int,Fl_Align) {}
40
41 void
fl_normal_label(const Fl_Label * o,int X,int Y,int W,int H,Fl_Align align)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
fl_normal_measure(const Fl_Label * o,int & W,int & H)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. */
set_labeltype(Fl_Labeltype t,Fl_Label_Draw_F * f,Fl_Label_Measure_F * m)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. */
draw(int X,int Y,int W,int H,Fl_Align align) const86 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 */
measure(int & W,int & H) const95 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 */
draw_label() const108 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 */
draw_label(int X,int Y,int W,int H) const118 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 */
draw_label(int X,int Y,int W,int H,Fl_Align a) const127 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 //
145