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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 #include "boolanm.h"
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25
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26 #define MAX_BUTTONS 16
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27
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28 namespace goatkit {
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29
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30 struct ScreenImpl {
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31 BoolAnim visible;
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32 std::vector<Widget*> widgets;
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33 BBox box;
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34
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35 Widget *inp_focused, *over, *pressed[MAX_BUTTONS];
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36 Widget *mgrab;
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37 };
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38
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39 static Vec2 world_to_scr(const ScreenImpl *scr, const Vec2 &v);
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40 //static Vec2 scr_to_world(const ScreenImpl *scr, const Vec2 &v)
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41
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42 Screen::Screen()
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43 {
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44 scr = new ScreenImpl;
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45
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46 scr->box.bmin = Vec2(0, 0);
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47 scr->box.bmax = Vec2(1, 1);
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48
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49 scr->inp_focused = scr->over = 0;
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50 for(int i=0; i<MAX_BUTTONS; i++) {
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51 scr->pressed[i] = 0;
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52 }
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53
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54 scr->visible = true;
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55 scr->mgrab = 0;
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56 }
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57
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58 Screen::~Screen()
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59 {
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60 delete scr;
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61 }
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62
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63 void Screen::set_position(float x, float y)
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64 {
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65 set_position(Vec2(x, y));
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66 }
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67
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68 void Screen::set_position(const Vec2 &pos)
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69 {
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70 Vec2 sz = get_size();
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71
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72 scr->box.bmin = pos;
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73 scr->box.bmax.x = pos.x + sz.x;
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74 scr->box.bmax.y = pos.y + sz.y;
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75 }
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76
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77 const Vec2 &Screen::get_position() const
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78 {
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79 return scr->box.bmin;
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80 }
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81
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82 void Screen::set_size(float x, float y)
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83 {
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84 set_size(Vec2(x, y));
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85 }
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86
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87 void Screen::set_size(const Vec2 &sz)
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88 {
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89 scr->box.bmax.x = scr->box.bmin.x + sz.x;
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90 scr->box.bmax.y = scr->box.bmin.y + sz.y;
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91 }
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92
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93 const Vec2 Screen::get_size() const
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94 {
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95 return Vec2(scr->box.bmax.x - scr->box.bmin.x,
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96 scr->box.bmax.y - scr->box.bmin.y);
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97 }
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98
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99 const BBox &Screen::get_box() const
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100 {
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101 return scr->box;
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102 }
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103
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104 void Screen::add_widget(Widget *w)
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105 {
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106 scr->widgets.push_back(w);
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107 if(scr->visible) {
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108 w->show();
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109 } else {
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110 w->hide();
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111 }
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112
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113 w->set_screen(this);
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114 }
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115
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116 int Screen::get_widget_count() const
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117 {
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118 return (int)scr->widgets.size();
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119 }
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120
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121 Widget *Screen::get_widget(int idx) const
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122 {
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123 if(idx < 0 || idx >= (int)scr->widgets.size()) {
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124 return 0;
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125 }
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126 return scr->widgets[idx];
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127 }
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128
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129 Widget *Screen::get_widget(const char *name) const
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130 {
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131 for(size_t i=0; i<scr->widgets.size(); i++) {
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132 if(strcmp(scr->widgets[i]->get_name(), name) == 0) {
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133 return scr->widgets[i];
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134 }
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135 }
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136 return 0;
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137 }
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138
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139 void Screen::show()
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140 {
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141 scr->visible.change(true);
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142
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143 for(size_t i=0; i<scr->widgets.size(); i++) {
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144 scr->widgets[i]->show();
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145 }
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146 }
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147
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148 void Screen::hide()
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149 {
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150 scr->visible.change(false);
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151
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152 for(size_t i=0; i<scr->widgets.size(); i++) {
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153 scr->widgets[i]->hide();
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154 }
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155 }
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156
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157 bool Screen::is_visible() const
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158 {
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159 return scr->visible;
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160 }
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161
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162 float Screen::get_visibility() const
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163 {
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164 return scr->visible.get_value();
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165 }
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166
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167 void Screen::set_visibility_transition(long msec)
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168 {
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169 scr->visible.set_transition_duration(msec);
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170 for(size_t i=0; i<scr->widgets.size(); i++) {
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171 scr->widgets[i]->set_visibility_transition(msec);
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172 }
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173 }
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174
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175 long Screen::get_visibility_transition() const
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176 {
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177 return scr->visible.get_transition_duration();
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178 }
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179
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180 bool Screen::grab_mouse(Widget *w)
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181 {
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182 if(!scr->mgrab || !w) {
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183 scr->mgrab = w;
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184 return true;
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185 }
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186 return false;
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187 }
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188
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189 void Screen::draw() const
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190 {
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191 for(size_t i=0; i<scr->widgets.size(); i++) {
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192 scr->widgets[i]->draw();
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193 }
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194 }
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195
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196 static Widget *find_widget_at(const ScreenImpl *scr, const Vec2 &pt)
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197 {
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198 for(size_t i=0; i<scr->widgets.size(); i++) {
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199 Widget *w = scr->widgets[i];
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200
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201 if(w->hit_test(pt)) {
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202 return w;
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203 }
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204 }
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205 return 0;
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206 }
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207
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208 void Screen::sysev_keyboard(int key, bool press)
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209 {
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210 Event ev;
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211
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212 if(scr->inp_focused) {
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213 ev.type = EV_KEY;
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214 ev.key.key = key;
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215 ev.key.press = press;
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216 scr->inp_focused->handle_event(ev);
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217 }
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218 }
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219
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220 void Screen::sysev_mouse_button(int bn, bool press, float x, float y)
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221 {
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222 Event ev;
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223 Vec2 pt = world_to_scr(scr, Vec2(x, y));
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224 Widget *new_over = scr->mgrab ? scr->mgrab : find_widget_at(scr, pt);
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225
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226 ev.type = EV_MOUSE_BUTTON;
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227 ev.button.button = bn;
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228 ev.button.pos = pt;
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229 ev.button.press = press;
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230
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231 if(press) {
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232 if(bn == 0) {
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233 // left click gives input focus
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234 // TODO: add input focus event in widget
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235 if(new_over && new_over != scr->inp_focused && new_over->can_focus()) {
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236 printf("input focus %p -> %p\n", (void*)scr->inp_focused, (void*)new_over);
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237 new_over->focusin();
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238
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239 if(scr->inp_focused) {
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240 scr->inp_focused->focusout();
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241 }
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242 scr->inp_focused = new_over;
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243 }
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244 }
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245
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246 scr->pressed[bn] = new_over;
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247 scr->over = new_over;
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248
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249 if(new_over) {
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250 new_over->handle_event(ev);
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251 }
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252
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253 } else {
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254 // send the mouse release event to the widget that got the matching press
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255 if(scr->pressed[bn]) {
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256 scr->pressed[bn]->handle_event(ev);
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257 scr->pressed[bn] = 0;
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258 }
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259 }
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260
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261 // if we're not over the same widget any more send the leave/enter events
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262 // TODO also add drag/drop events
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263 if(scr->over != new_over) {
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264 ev.type = EV_MOUSE_FOCUS;
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265 if(scr->over) {
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266 ev.focus.enter = false;
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267 scr->over->handle_event(ev);
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268 }
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269 if(new_over) {
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270 ev.focus.enter = true;
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271 new_over->handle_event(ev);
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272 }
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273 scr->over = new_over;
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274 }
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275 }
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276
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277 void Screen::sysev_mouse_motion(float x, float y)
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278 {
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279 Event ev;
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280 Vec2 pt = world_to_scr(scr, Vec2(x, y));
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281 Widget *new_over = scr->mgrab ? scr->mgrab : find_widget_at(scr, pt);
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282
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283 // if we're not over the same widget any more send the leave/enter events
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284 if(scr->over != new_over) {
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285 ev.type = EV_MOUSE_FOCUS;
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286 if(scr->over) {
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287 ev.focus.enter = false;
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288 scr->over->handle_event(ev);
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289 }
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290 if(new_over) {
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291 ev.focus.enter = true;
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292 new_over->handle_event(ev);
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293 }
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294 scr->over = new_over;
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295 }
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296
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297 if(new_over) {
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298 // send motion event
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299 ev.type = EV_MOUSE_MOTION;
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300 ev.motion.pos = pt;
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301 new_over->handle_event(ev);
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302 }
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303 }
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304
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305 static Vec2 world_to_scr(const ScreenImpl *scr, const Vec2 &v)
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306 {
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307 return Vec2(v.x - scr->box.bmin.x, v.y - scr->box.bmin.y);
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308 }
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309
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310 /*
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311 static Vec2 scr_to_world(const ScreenImpl *scr, const Vec2 &v)
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312 {
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313 return Vec2(v.x + scr->box.bmin.x, v.y + scr->box.bmin.y);
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314 }
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315 */
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316
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317
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318 } // namespace goatkit
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