Mercurial > tablet-emu

annotate src/main.rs @ 10:06d77bb94a50

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Move more state handling inside of State.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Sun, 01 Nov 2020 15:50:38 +0100
parents d1972fc49a5b
children 0193041f01d4
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rev   line source
6
dd10331549c6 Add a license file.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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1 // Tablet emulator, for people who don’t own one
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2 // Copyright © 2020 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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3 //
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4 // This program is free software: you can redistribute it and/or modify
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5 // it under the terms of the GNU Affero General Public License as published by
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6 // the Free Software Foundation, either version 3 of the License, or
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7 // (at your option) any later version.
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8 //
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9 // This program is distributed in the hope that it will be useful,
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10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 // GNU Affero General Public License for more details.
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13 //
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14 // You should have received a copy of the GNU Affero General Public License
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15 // along with this program. If not, see <https://www.gnu.org/licenses/>.
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16
0
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17 use gio::prelude::*;
9
d1972fc49a5b Reorganise the code a bit.
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18 use glib::clone;
0
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19 use gtk::prelude::*;
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20
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21 use std::env::args;
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22 use std::fs::{File, OpenOptions};
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23 use std::io::ErrorKind;
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24 use std::sync::{Arc, Mutex};
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25
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26 use input_linux::{
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27 sys::input_event, sys::timeval, AbsoluteAxis, AbsoluteInfo, AbsoluteInfoSetup, EventKind,
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6dbe2bbeef70 Improve input event types with helper functions.
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28 InputId, InputProperty, Key, MiscKind, SynchronizeKind, UInputHandle,
0
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29 };
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30
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31 const WIDTH: i32 = 320;
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32 const HEIGHT: i32 = 180;
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33
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34 const MAX_X: i32 = 69920;
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35 const MAX_Y: i32 = 39980;
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36
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37 fn create_uinput_device() -> std::io::Result<UInputHandle<File>> {
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38 let file = OpenOptions::new().write(true).open("/dev/uinput")?;
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39 let dev = UInputHandle::new(file);
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40
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41 dev.set_evbit(EventKind::Synchronize)?;
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42 dev.set_evbit(EventKind::Key)?;
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43 dev.set_evbit(EventKind::Absolute)?;
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44 dev.set_evbit(EventKind::Misc)?;
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45 dev.set_keybit(Key::ButtonToolPen)?;
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46 dev.set_keybit(Key::ButtonToolRubber)?;
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47 dev.set_keybit(Key::ButtonToolBrush)?;
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48 dev.set_keybit(Key::ButtonToolPencil)?;
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49 dev.set_keybit(Key::ButtonToolAirbrush)?;
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50 dev.set_keybit(Key::ButtonTouch)?;
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51 dev.set_keybit(Key::ButtonStylus)?;
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52 dev.set_keybit(Key::ButtonStylus2)?;
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53 dev.set_keybit(Key::ButtonStylus3)?;
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54 dev.set_mscbit(MiscKind::Serial)?;
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55 dev.set_propbit(InputProperty::Direct)?;
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56
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57 dev.set_absbit(AbsoluteAxis::X)?;
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58 dev.set_absbit(AbsoluteAxis::Y)?;
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59 dev.set_absbit(AbsoluteAxis::Z)?;
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60 dev.set_absbit(AbsoluteAxis::Wheel)?;
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61 dev.set_absbit(AbsoluteAxis::Pressure)?;
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62 dev.set_absbit(AbsoluteAxis::Distance)?;
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63 dev.set_absbit(AbsoluteAxis::TiltX)?;
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64 dev.set_absbit(AbsoluteAxis::TiltY)?;
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65 dev.set_absbit(AbsoluteAxis::Misc)?;
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66
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67 let id = InputId {
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68 bustype: 3,
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69 vendor: 0x56a,
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70 product: 0x350,
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71 version: 0xb,
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72 };
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73
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74 let x = AbsoluteInfoSetup {
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75 axis: AbsoluteAxis::X,
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76 info: AbsoluteInfo {
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77 value: 0,
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78 minimum: 0,
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79 maximum: MAX_X,
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80 fuzz: 0,
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81 flat: 0,
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82 resolution: 200,
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83 },
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84 };
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85 let y = AbsoluteInfoSetup {
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86 axis: AbsoluteAxis::Y,
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87 info: AbsoluteInfo {
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88 value: 0,
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89 minimum: 0,
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90 maximum: MAX_Y,
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91 fuzz: 0,
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92 flat: 0,
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93 resolution: 200,
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94 },
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95 };
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96 let z = AbsoluteInfoSetup {
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97 axis: AbsoluteAxis::Z,
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98 info: AbsoluteInfo {
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99 value: 0,
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100 minimum: -900,
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101 maximum: 899,
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102 fuzz: 0,
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103 flat: 0,
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104 resolution: 287,
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105 },
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106 };
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107 let wheel = AbsoluteInfoSetup {
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108 axis: AbsoluteAxis::Wheel,
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109 info: AbsoluteInfo {
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110 value: 0,
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111 minimum: 0,
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112 maximum: 2047,
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113 fuzz: 0,
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114 flat: 0,
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115 resolution: 0,
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116 },
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117 };
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118 let pressure = AbsoluteInfoSetup {
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119 axis: AbsoluteAxis::Pressure,
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120 info: AbsoluteInfo {
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121 value: 0,
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122 minimum: 0,
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123 maximum: 8196,
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124 fuzz: 0,
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125 flat: 0,
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126 resolution: 0,
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127 },
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128 };
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129 let distance = AbsoluteInfoSetup {
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130 axis: AbsoluteAxis::Distance,
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131 info: AbsoluteInfo {
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132 value: 0,
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133 minimum: 0,
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134 maximum: 63,
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135 fuzz: 0,
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136 flat: 0,
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137 resolution: 0,
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138 },
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139 };
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140 let tilt_x = AbsoluteInfoSetup {
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141 axis: AbsoluteAxis::TiltX,
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142 info: AbsoluteInfo {
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143 value: 0,
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144 minimum: -64,
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145 maximum: 63,
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146 fuzz: 0,
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147 flat: 0,
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148 resolution: 57,
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149 },
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150 };
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151 let tilt_y = AbsoluteInfoSetup {
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152 axis: AbsoluteAxis::TiltY,
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153 info: AbsoluteInfo {
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154 value: 0,
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155 minimum: -64,
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156 maximum: 63,
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157 fuzz: 0,
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158 flat: 0,
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159 resolution: 57,
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160 },
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161 };
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162 let misc = AbsoluteInfoSetup {
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163 axis: AbsoluteAxis::Misc,
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164 info: AbsoluteInfo {
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165 value: 0,
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166 minimum: 0,
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167 maximum: 0,
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168 fuzz: 0,
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169 flat: 0,
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170 resolution: 0,
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171 },
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172 };
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173
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174 dev.create(
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175 &id,
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176 b"TabletEmu",
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177 0,
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178 &[x, y, z, wheel, pressure, distance, tilt_x, tilt_y, misc],
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179 )?;
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180 Ok(dev)
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181 }
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182
1
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183 fn input_event_new(type_: EventKind, code: u16, value: i32) -> input_event {
0
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184 input_event {
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185 time: timeval {
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186 tv_sec: 0,
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187 tv_usec: 0,
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188 },
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189 type_: type_ as u16,
1
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190 code,
0
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191 value,
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192 }
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193 }
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194
1
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195 fn input_axis_new(code: AbsoluteAxis, value: i32) -> input_event {
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196 input_event_new(EventKind::Absolute, code as u16, value)
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197 }
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198
2
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199 fn input_key_new(code: Key, value: i32) -> input_event {
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200 input_event_new(EventKind::Key, code as u16, value)
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201 }
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202
1
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203 fn input_misc_new(code: MiscKind, value: i32) -> input_event {
2
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204 input_event_new(EventKind::Misc, code as u16, value)
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205 }
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206
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207 fn input_synchronize_new(code: SynchronizeKind, value: i32) -> input_event {
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208 input_event_new(EventKind::Synchronize, code as u16, value)
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209 }
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210
3
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211 struct State {
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212 dev: UInputHandle<File>,
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213 width: f64,
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214 height: f64,
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215 selected_tool: Key,
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216 pressed: bool,
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217 }
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218
9
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219 impl State {
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220 fn new() -> std::io::Result<Arc<Mutex<State>>> {
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221 let dev = create_uinput_device()?;
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222 println!(
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223 "New device at {:?} ({:?})",
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224 dev.evdev_path()?,
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225 dev.sys_path()?
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226 );
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227
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228 Ok(Arc::new(Mutex::new(State {
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229 dev,
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230 width: WIDTH as f64,
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231 height: HEIGHT as f64,
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232 selected_tool: Key::ButtonToolPen,
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233 pressed: false,
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234 })))
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235 }
10
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236
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237 fn select_tool(&mut self, tool: Key) {
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238 self.selected_tool = tool;
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239 }
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240
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241 fn press(&mut self, x: f64, y: f64) -> std::io::Result<()> {
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242 self.pressed = true;
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243 self.dev.write(&[
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244 input_axis_new(AbsoluteAxis::X, (x * MAX_X as f64 / self.width) as i32),
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245 input_axis_new(AbsoluteAxis::Y, (y * MAX_Y as f64 / self.height) as i32),
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246 input_axis_new(AbsoluteAxis::Z, 0),
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247 input_axis_new(AbsoluteAxis::Wheel, 0),
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248 input_axis_new(AbsoluteAxis::Pressure, 1024),
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249 input_axis_new(AbsoluteAxis::Distance, 0),
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250 input_axis_new(AbsoluteAxis::TiltX, 16),
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251 input_axis_new(AbsoluteAxis::TiltY, 0),
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252 input_misc_new(MiscKind::Serial, 0),
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253 input_key_new(self.selected_tool, 1),
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254 input_synchronize_new(SynchronizeKind::Report, 0),
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255 ])?;
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256 Ok(())
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257 }
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258
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259 fn release(&mut self, x: f64, y: f64) -> std::io::Result<()> {
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260 self.pressed = false;
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261 self.dev.write(&[
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262 input_axis_new(AbsoluteAxis::X, (x * MAX_X as f64 / self.width) as i32),
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263 input_axis_new(AbsoluteAxis::Y, (y * MAX_Y as f64 / self.height) as i32),
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264 input_axis_new(AbsoluteAxis::Z, 0),
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265 input_axis_new(AbsoluteAxis::Wheel, 0),
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266 input_axis_new(AbsoluteAxis::Pressure, 0),
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267 input_axis_new(AbsoluteAxis::Distance, 16),
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268 input_axis_new(AbsoluteAxis::TiltX, 16),
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269 input_axis_new(AbsoluteAxis::TiltY, 0),
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270 input_misc_new(MiscKind::Serial, 0),
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271 input_key_new(self.selected_tool, 1),
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272 input_synchronize_new(SynchronizeKind::Report, 0),
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273 ])?;
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274 Ok(())
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275 }
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276
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277 fn motion(&mut self, x: f64, y: f64) -> std::io::Result<()> {
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278 self.dev.write(&[
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279 input_axis_new(AbsoluteAxis::X, (x * MAX_X as f64 / self.width) as i32),
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280 input_axis_new(AbsoluteAxis::Y, (y * MAX_Y as f64 / self.height) as i32),
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281 input_axis_new(AbsoluteAxis::Z, 0),
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282 input_axis_new(AbsoluteAxis::Wheel, 0),
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283 input_axis_new(AbsoluteAxis::Pressure, if self.pressed { 2048 } else { 0 }),
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284 input_axis_new(AbsoluteAxis::Distance, if self.pressed { 0 } else { 32 }),
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285 input_axis_new(AbsoluteAxis::TiltX, 16),
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286 input_axis_new(AbsoluteAxis::TiltY, 0),
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287 input_misc_new(MiscKind::Serial, 0),
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288 input_key_new(self.selected_tool, 1),
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289 input_synchronize_new(SynchronizeKind::Report, 0),
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diff changeset
290 ])?;
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291 Ok(())
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292 }
9
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293 }
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294
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295 fn build_main_menu(application: &gtk::Application) {
5
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296 let quit = gio::SimpleAction::new("quit", None);
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297 application.set_accels_for_action("app.quit", &["<Control>q"]);
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298 application.add_action(&quit);
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299 quit.connect_activate(clone!(@weak application => move |_, _| application.quit()));
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300
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301 let about = gio::SimpleAction::new("about", None);
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302 application.add_action(&about);
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diff changeset
303 about.connect_activate(|_, _| {
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diff changeset
304 let about = gtk::AboutDialog::new();
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305 about.set_program_name("TabletEmu");
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diff changeset
306 about.set_logo_icon_name(Some("input-tablet"));
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parents: 4
diff changeset
307 about.set_website(Some("https://hg.linkmauve.fr/tablet-emu"));
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diff changeset
308 about.set_version(Some("0.1"));
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diff changeset
309 about.set_license_type(gtk::License::Agpl30);
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310 about.set_copyright(Some("© 2020 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>"));
5
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diff changeset
311 about.run();
9
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diff changeset
312 unsafe {
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313 about.destroy();
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314 }
5
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diff changeset
315 });
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316
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317 let menu = gio::Menu::new();
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318 {
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319 let file = gio::Menu::new();
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320 file.append(Some("_Quit"), Some("app.quit"));
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diff changeset
321 menu.append_submenu(Some("_File"), &file);
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322 }
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diff changeset
323 {
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324 let help = gio::Menu::new();
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325 help.append(Some("_About"), Some("app.about"));
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diff changeset
326 menu.append_submenu(Some("_Help"), &help);
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327 }
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328 application.set_menubar(Some(&menu));
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329 }
5
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330
9
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331 fn build_ui(application: &gtk::Application) {
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332 build_main_menu(application);
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333
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334 let state = match State::new() {
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335 Ok(state) => state,
0
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336 Err(err) => {
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337 match err.kind() {
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338 ErrorKind::NotFound => {
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339 eprintln!("Couldn’t find /dev/uinput: {}", err);
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340 eprintln!("Maybe you forgot to `modprobe uinput`?");
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341 }
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342 ErrorKind::PermissionDenied => {
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343 eprintln!("Couldn’t open /dev/uinput for writing: {}", err);
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344 eprintln!("Maybe you aren’t allowed to create input devices?");
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345 }
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346 _ => eprintln!("Couldn’t open /dev/uinput for writing: {}", err),
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347 }
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348 std::process::exit(1);
0
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349 }
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350 };
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351
0
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352 let window = gtk::ApplicationWindow::new(application);
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353 window.set_title("tablet-emu");
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354 window.set_position(gtk::WindowPosition::Center);
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355
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356 let hbox = gtk::Box::new(gtk::Orientation::Horizontal, 0);
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357 let tools_box = gtk::Box::new(gtk::Orientation::Vertical, 0);
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358
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359 macro_rules! impl_tool {
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360 ($tool:tt) => {
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361 let tool = gtk::Button::with_mnemonic($tool);
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362 let state_weak = Arc::downgrade(&state);
4
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363 tool.connect_clicked(move |b| {
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364 let state = state_weak.upgrade().unwrap();
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365 let mut state = state.lock().unwrap();
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366 let tool = match b.get_label().unwrap().as_str() {
8
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367 "_Pen" => Key::ButtonToolPen,
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368 "_Rubber" => Key::ButtonToolRubber,
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369 "_Brush" => Key::ButtonToolBrush,
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370 "P_encil" => Key::ButtonToolPencil,
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371 "_Airbrush" => Key::ButtonToolAirbrush,
2
39f87ef69b2a Add support for selecting tools.
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372 _ => unreachable!(),
39f87ef69b2a Add support for selecting tools.
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373 };
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06d77bb94a50 Move more state handling inside of State.
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374 state.select_tool(tool);
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375 });
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376 tools_box.add(&tool);
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377 };
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378 };
8
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379 impl_tool!("_Pen");
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380 impl_tool!("_Rubber");
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381 impl_tool!("_Brush");
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382 impl_tool!("P_encil");
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383 impl_tool!("_Airbrush");
0
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parents:
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384
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385 let drawing_area = gtk::DrawingArea::new();
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386 drawing_area.set_size_request(WIDTH, HEIGHT);
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parents:
diff changeset
387 drawing_area.set_hexpand(true);
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parents:
diff changeset
388 drawing_area.set_events(
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parents:
diff changeset
389 gdk::EventMask::BUTTON_PRESS_MASK
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parents:
diff changeset
390 | gdk::EventMask::BUTTON_RELEASE_MASK
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parents:
diff changeset
391 | gdk::EventMask::POINTER_MOTION_MASK,
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diff changeset
392 );
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72e63d6a3f8a Simplify state handling into a single struct.
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393 let state_weak = Arc::downgrade(&state);
0
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diff changeset
394 drawing_area.connect_configure_event(move |_, event| {
3
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
395 let state = state_weak.upgrade().unwrap();
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
396 let mut state = state.lock().unwrap();
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
397 match event.get_size() {
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
398 (width, height) => {
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
399 state.width = width as f64;
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
400 state.height = height as f64;
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
401 }
72e63d6a3f8a Simplify state handling into a single struct.
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parents: 2
diff changeset
402 }
0
816237b684ea Hello world!
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parents:
diff changeset
403 true
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
404 });
3
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
405 let state_weak = Arc::downgrade(&state);
0
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parents:
diff changeset
406 drawing_area.connect_button_press_event(move |_, event| {
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
407 if event.get_button() != 1 {
816237b684ea Hello world!
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parents:
diff changeset
408 return Inhibit(false);
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
409 }
816237b684ea Hello world!
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parents:
diff changeset
410
3
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
411 let state = state_weak.upgrade().unwrap();
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
412 let mut state = state.lock().unwrap();
0
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diff changeset
413 let (x, y) = event.get_position();
10
06d77bb94a50 Move more state handling inside of State.
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diff changeset
414 state.press(x, y).unwrap();
0
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parents:
diff changeset
415 Inhibit(false)
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parents:
diff changeset
416 });
3
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
417 let state_weak = Arc::downgrade(&state);
0
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parents:
diff changeset
418 drawing_area.connect_button_release_event(move |_, event| {
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parents:
diff changeset
419 if event.get_button() != 1 {
816237b684ea Hello world!
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parents:
diff changeset
420 return Inhibit(false);
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
421 }
816237b684ea Hello world!
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parents:
diff changeset
422
3
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
423 let state = state_weak.upgrade().unwrap();
72e63d6a3f8a Simplify state handling into a single struct.
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diff changeset
424 let mut state = state.lock().unwrap();
0
816237b684ea Hello world!
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425 let (x, y) = event.get_position();
10
06d77bb94a50 Move more state handling inside of State.
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diff changeset
426 state.release(x, y).unwrap();
0
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parents:
diff changeset
427 Inhibit(false)
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parents:
diff changeset
428 });
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
429 drawing_area.connect_motion_notify_event(move |_, event| {
10
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parents: 9
diff changeset
430 let mut state = state.lock().unwrap();
0
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parents:
diff changeset
431 let (x, y) = event.get_position();
10
06d77bb94a50 Move more state handling inside of State.
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parents: 9
diff changeset
432 state.motion(x, y).unwrap();
0
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parents:
diff changeset
433 Inhibit(false)
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
434 });
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
435 drawing_area.connect_draw(move |_, ctx| {
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
436 //println!("drawing {}", drawing_area);
816237b684ea Hello world!
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parents:
diff changeset
437 ctx.set_source_rgb(1., 0., 0.);
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parents:
diff changeset
438 ctx.set_operator(cairo::Operator::Screen);
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
439 ctx.paint();
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parents:
diff changeset
440 Inhibit(false)
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
441 });
816237b684ea Hello world!
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parents:
diff changeset
442
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
443 hbox.add(&tools_box);
816237b684ea Hello world!
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parents:
diff changeset
444 hbox.add(&drawing_area);
816237b684ea Hello world!
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parents:
diff changeset
445
816237b684ea Hello world!
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parents:
diff changeset
446 window.add(&hbox);
816237b684ea Hello world!
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parents:
diff changeset
447
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
448 window.show_all();
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parents:
diff changeset
449 }
816237b684ea Hello world!
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parents:
diff changeset
450
816237b684ea Hello world!
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parents:
diff changeset
451 fn main() {
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parents:
diff changeset
452 let application = gtk::Application::new(
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parents:
diff changeset
453 Some("fr.linkmauve.TabletEmu"),
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parents:
diff changeset
454 gio::ApplicationFlags::empty(),
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
455 )
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
456 .expect("Initialisation failed…");
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
457 application.connect_activate(build_ui);
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
458 application.run(&args().collect::<Vec<_>>());
816237b684ea Hello world!
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff changeset
459 }