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1 /*
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2 GoatKit - a themable/animated widget toolkit for games
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3 Copyright (C) 2014 John Tsiombikas <nuclear@member.fsf.org>
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU Lesser General Public License as published by
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7 the Free Software Foundation, either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18 #include <stdio.h>
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19 #include <stdlib.h>
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20 #include <string.h>
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21 #include <vector>
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22 #include "screen.h"
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23 #include "widget.h"
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24
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25 #define MAX_BUTTONS 16
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26
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27 namespace goatkit {
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28
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29 struct ScreenImpl {
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30 bool visible;
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31 std::vector<Widget*> widgets;
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32 BBox box;
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33
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34 Widget *inp_focused, *over, *pressed[MAX_BUTTONS];
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35 Widget *mgrab;
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36 };
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37
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38 static Vec2 world_to_scr(const ScreenImpl *scr, const Vec2 &v);
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39 //static Vec2 scr_to_world(const ScreenImpl *scr, const Vec2 &v)
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40
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41 Screen::Screen()
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42 {
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43 scr = new ScreenImpl;
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44
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45 scr->box.bmin = Vec2(0, 0);
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46 scr->box.bmax = Vec2(1, 1);
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47
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48 scr->inp_focused = scr->over = 0;
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49 for(int i=0; i<MAX_BUTTONS; i++) {
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50 scr->pressed[i] = 0;
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51 }
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52
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53 scr->visible = true;
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54 scr->mgrab = 0;
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55 }
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56
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57 Screen::~Screen()
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58 {
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59 delete scr;
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60 }
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61
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62 void Screen::set_position(float x, float y)
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63 {
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64 set_position(Vec2(x, y));
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65 }
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66
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67 void Screen::set_position(const Vec2 &pos)
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68 {
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69 Vec2 sz = get_size();
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70
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71 scr->box.bmin = pos;
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72 scr->box.bmax.x = pos.x + sz.x;
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73 scr->box.bmax.y = pos.y + sz.y;
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74 }
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75
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76 const Vec2 &Screen::get_position() const
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77 {
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78 return scr->box.bmin;
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79 }
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80
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81 void Screen::set_size(float x, float y)
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82 {
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83 set_size(Vec2(x, y));
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84 }
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85
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86 void Screen::set_size(const Vec2 &sz)
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87 {
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88 scr->box.bmax.x = scr->box.bmin.x + sz.x;
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89 scr->box.bmax.y = scr->box.bmin.y + sz.y;
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90 }
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91
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92 const Vec2 Screen::get_size() const
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93 {
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94 return Vec2(scr->box.bmax.x - scr->box.bmin.x,
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95 scr->box.bmax.y - scr->box.bmin.y);
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96 }
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97
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98 const BBox &Screen::get_box() const
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99 {
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100 return scr->box;
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101 }
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102
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103 void Screen::add_widget(Widget *w)
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104 {
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105 scr->widgets.push_back(w);
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106 if(scr->visible) {
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107 w->show();
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108 } else {
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109 w->hide();
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110 }
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111
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112 w->set_screen(this);
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113 }
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114
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115 int Screen::get_widget_count() const
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116 {
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117 return (int)scr->widgets.size();
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118 }
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119
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120 Widget *Screen::get_widget(int idx) const
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121 {
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122 if(idx < 0 || idx >= (int)scr->widgets.size()) {
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123 return 0;
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124 }
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125 return scr->widgets[idx];
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126 }
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127
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128 Widget *Screen::get_widget(const char *name) const
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129 {
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130 for(size_t i=0; i<scr->widgets.size(); i++) {
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131 if(strcmp(scr->widgets[i]->get_name(), name) == 0) {
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132 return scr->widgets[i];
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133 }
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134 }
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135 return 0;
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136 }
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137
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138 void Screen::show()
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139 {
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140 scr->visible = true;
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141
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142 for(size_t i=0; i<scr->widgets.size(); i++) {
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143 scr->widgets[i]->show();
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144 }
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145 }
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146
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147 void Screen::hide()
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148 {
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149 scr->visible = false;
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150
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151 for(size_t i=0; i<scr->widgets.size(); i++) {
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152 scr->widgets[i]->hide();
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153 }
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154 }
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155
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156 bool Screen::is_visible() const
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157 {
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158 return scr->visible;
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159 }
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160
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161 bool Screen::grab_mouse(Widget *w)
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162 {
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163 if(!scr->mgrab || !w) {
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164 scr->mgrab = w;
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165 return true;
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166 }
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167 return false;
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168 }
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169
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170 void Screen::draw() const
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171 {
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172 for(size_t i=0; i<scr->widgets.size(); i++) {
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173 scr->widgets[i]->draw();
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174 }
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175 }
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176
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177 static Widget *find_widget_at(const ScreenImpl *scr, const Vec2 &pt)
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178 {
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179 for(size_t i=0; i<scr->widgets.size(); i++) {
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180 Widget *w = scr->widgets[i];
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181
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182 if(w->hit_test(pt)) {
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183 return w;
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184 }
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185 }
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186 return 0;
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187 }
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188
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189 void Screen::sysev_keyboard(int key, bool press)
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190 {
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191 Event ev;
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192
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193 if(scr->inp_focused) {
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194 ev.type = EV_KEY;
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195 ev.key.key = key;
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196 ev.key.press = press;
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197 scr->inp_focused->handle_event(ev);
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198 }
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199 }
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200
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201 void Screen::sysev_mouse_button(int bn, bool press, float x, float y)
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202 {
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203 Event ev;
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204 Vec2 pt = world_to_scr(scr, Vec2(x, y));
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205 Widget *new_over = scr->mgrab ? scr->mgrab : find_widget_at(scr, pt);
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206
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207 ev.type = EV_MOUSE_BUTTON;
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208 ev.button.button = bn;
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209 ev.button.pos = pt;
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210 ev.button.press = press;
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211
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212 if(press) {
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213 if(bn == 0) {
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214 // left click gives input focus
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215 // TODO: add input focus event in widget
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216 if(new_over && new_over != scr->inp_focused && new_over->can_focus()) {
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217 printf("input focus %p -> %p\n", (void*)scr->inp_focused, (void*)new_over);
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218 new_over->focusin();
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219
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220 if(scr->inp_focused) {
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221 scr->inp_focused->focusout();
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222 }
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223 scr->inp_focused = new_over;
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224 }
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225 }
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226
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227 scr->pressed[bn] = new_over;
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228 scr->over = new_over;
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229
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230 if(new_over) {
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231 new_over->handle_event(ev);
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232 }
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233
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234 } else {
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235 // send the mouse release event to the widget that got the matching press
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236 if(scr->pressed[bn]) {
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237 scr->pressed[bn]->handle_event(ev);
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238 scr->pressed[bn] = 0;
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239 }
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240 }
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241
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242 // if we're not over the same widget any more send the leave/enter events
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243 // TODO also add drag/drop events
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244 if(scr->over != new_over) {
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245 ev.type = EV_MOUSE_FOCUS;
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246 if(scr->over) {
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247 ev.focus.enter = false;
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248 scr->over->handle_event(ev);
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249 }
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250 if(new_over) {
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251 ev.focus.enter = true;
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252 new_over->handle_event(ev);
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253 }
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254 scr->over = new_over;
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255 }
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256 }
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257
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258 void Screen::sysev_mouse_motion(float x, float y)
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259 {
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260 Event ev;
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261 Vec2 pt = world_to_scr(scr, Vec2(x, y));
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262 Widget *new_over = scr->mgrab ? scr->mgrab : find_widget_at(scr, pt);
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263
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264 // if we're not over the same widget any more send the leave/enter events
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265 if(scr->over != new_over) {
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266 ev.type = EV_MOUSE_FOCUS;
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267 if(scr->over) {
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268 ev.focus.enter = false;
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269 scr->over->handle_event(ev);
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270 }
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271 if(new_over) {
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272 ev.focus.enter = true;
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273 new_over->handle_event(ev);
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274 }
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275 scr->over = new_over;
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276 }
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277
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278 if(new_over) {
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279 // send motion event
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280 ev.type = EV_MOUSE_MOTION;
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281 ev.motion.pos = pt;
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282 new_over->handle_event(ev);
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283 }
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284 }
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285
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286 static Vec2 world_to_scr(const ScreenImpl *scr, const Vec2 &v)
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287 {
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288 return Vec2(v.x - scr->box.bmin.x, v.y - scr->box.bmin.y);
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289 }
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290
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291 /*
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292 static Vec2 scr_to_world(const ScreenImpl *scr, const Vec2 &v)
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293 {
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294 return Vec2(v.x + scr->box.bmin.x, v.y + scr->box.bmin.y);
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295 }
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296 */
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297
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298
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299 } // namespace goatkit
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