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tabindex="-1"> <a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div> </div></form></nav></div><section id="main-content" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1">1</span> <span id="2">2</span> <span id="3">3</span> <span id="4">4</span> <span id="5">5</span> <span id="6">6</span> <span id="7">7</span> <span id="8">8</span> <span id="9">9</span> <span id="10">10</span> <span id="11">11</span> <span id="12">12</span> <span id="13">13</span> <span id="14">14</span> <span id="15">15</span> <span id="16">16</span> <span id="17">17</span> <span id="18">18</span> <span id="19">19</span> <span id="20">20</span> <span id="21">21</span> <span id="22">22</span> <span id="23">23</span> <span id="24">24</span> <span id="25">25</span> <span id="26">26</span> <span id="27">27</span> <span id="28">28</span> <span id="29">29</span> <span id="30">30</span> <span id="31">31</span> <span 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id="455">455</span> <span id="456">456</span> <span id="457">457</span> <span id="458">458</span> <span id="459">459</span> <span id="460">460</span> <span id="461">461</span> <span id="462">462</span> <span id="463">463</span> <span id="464">464</span> <span id="465">465</span> <span id="466">466</span> <span id="467">467</span> <span id="468">468</span> </pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">instant::Instant</span>; <span class="kw">use</span> <span class="ident">winit::event</span>::{ <span class="ident">ElementState</span>, <span class="ident">KeyboardInput</span>, <span class="ident">MouseButton</span>, <span class="ident">MouseScrollDelta</span>, <span class="ident">VirtualKeyCode</span>, <span class="ident">WindowEvent</span>, }; <span class="kw">use</span> <span class="ident">geom::Duration</span>; <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">EventCtx</span>, <span class="ident">Line</span>, <span class="ident">ScreenDims</span>, <span class="ident">ScreenPt</span>, <span class="ident">TextSpan</span>}; <span class="comment">// Mouse-up events longer than this will be considered single clicks</span> <span class="comment">// Ideally the delay would be a little more tolerant - e.g. 500ms, but because we don't actually</span> <span class="comment">// have a way to indicate that a single click was handled (and thus *shouldn't* be counted as part of a double click)</span> <span class="comment">// it's too easy to have false positives.</span> <span class="kw">const</span> <span class="ident">MAX_DOUBLE_CLICK_DURATION</span>: <span class="ident">instant::Duration</span> <span class="op">=</span> <span class="ident">instant::Duration::from_millis</span>(<span class="number">300</span>); <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>)]</span> <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Event</span> { <span class="comment">// Used to initialize the application and also to recalculate menu state when some other event</span> <span class="comment">// is used.</span> <span class="ident">NoOp</span>, <span class="ident">LeftMouseButtonDown</span>, <span class="doccomment">/// Note: When double clicking, there will be two `LeftMouseButtonUp` events in short</span> <span class="doccomment">/// succession - first a `LeftMouseButtonUp { is_double_click: false }`, followed by</span> <span class="doccomment">/// a `LeftMouseButtonUp { is_double_click: true }`.</span> <span class="doccomment">///</span> <span class="doccomment">/// This was done for ease of implementation - it allows a target to ignore single clicks and</span> <span class="doccomment">/// handle double clicks (or vice versa), but it precludes an obvious way to have a target</span> <span class="doccomment">/// handle single clicks one way while handling double clicks a different way.</span> <span class="doccomment">///</span> <span class="doccomment">/// e.g. a typical file browser highlights a file with a single click and opens the file with a</span> <span class="doccomment">/// double click, the way we've implemented double clicks here wouldn't work well for that</span> <span class="doccomment">/// case.</span> <span class="ident">LeftMouseButtonUp</span> { <span class="ident">is_double_click</span>: <span class="ident">bool</span>, }, <span class="ident">RightMouseButtonDown</span>, <span class="ident">RightMouseButtonUp</span>, <span class="comment">// TODO KeyDown and KeyUp might be nicer, but piston (and probably X.org) hands over repeated</span> <span class="comment">// events while a key is held down.</span> <span class="ident">KeyPress</span>(<span class="ident">Key</span>), <span class="ident">KeyRelease</span>(<span class="ident">Key</span>), <span class="comment">// Some real amount of time has passed since the last update</span> <span class="ident">Update</span>(<span class="ident">Duration</span>), <span class="ident">MouseMovedTo</span>(<span class="ident">ScreenPt</span>), <span class="ident">WindowLostCursor</span>, <span class="ident">WindowGainedCursor</span>, <span class="ident">MouseWheelScroll</span>(<span class="ident">f64</span>, <span class="ident">f64</span>), <span class="ident">WindowResized</span>(<span class="ident">ScreenDims</span>), } <span class="kw">impl</span> <span class="ident">Event</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_winit_event</span>( <span class="ident">ev</span>: <span class="ident">WindowEvent</span>, <span class="ident">scale_factor</span>: <span class="ident">f64</span>, <span class="ident">previous_click</span>: <span class="ident">Instant</span>, ) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Event</span><span class="op">></span> { <span class="kw">match</span> <span class="ident">ev</span> { <span class="ident">WindowEvent::MouseInput</span> { <span class="ident">state</span>, <span class="ident">button</span>, .. } => <span class="kw">match</span> (<span class="ident">button</span>, <span class="ident">state</span>) { (<span class="ident">MouseButton::Left</span>, <span class="ident">ElementState::Pressed</span>) => <span class="prelude-val">Some</span>(<span class="ident">Event::LeftMouseButtonDown</span>), (<span class="ident">MouseButton::Left</span>, <span class="ident">ElementState::Released</span>) => { <span class="kw">let</span> <span class="ident">is_double_click</span> <span class="op">=</span> <span class="ident">previous_click</span>.<span class="ident">elapsed</span>().<span class="ident">le</span>(<span class="kw-2">&</span><span class="ident">MAX_DOUBLE_CLICK_DURATION</span>); <span class="prelude-val">Some</span>(<span class="ident">Event::LeftMouseButtonUp</span> { <span class="ident">is_double_click</span> }) } (<span class="ident">MouseButton::Right</span>, <span class="ident">ElementState::Pressed</span>) => <span class="prelude-val">Some</span>(<span class="ident">Event::RightMouseButtonDown</span>), (<span class="ident">MouseButton::Right</span>, <span class="ident">ElementState::Released</span>) => <span class="prelude-val">Some</span>(<span class="ident">Event::RightMouseButtonUp</span>), <span class="kw">_</span> => <span class="prelude-val">None</span>, }, <span class="ident">WindowEvent::KeyboardInput</span> { <span class="ident">input</span>, .. } => { <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">key</span>) <span class="op">=</span> <span class="ident">Key::from_winit_key</span>(<span class="ident">input</span>) { <span class="kw">if</span> <span class="ident">input</span>.<span class="ident">state</span> <span class="op">==</span> <span class="ident">ElementState::Pressed</span> { <span class="prelude-val">Some</span>(<span class="ident">Event::KeyPress</span>(<span class="ident">key</span>)) } <span class="kw">else</span> { <span class="prelude-val">Some</span>(<span class="ident">Event::KeyRelease</span>(<span class="ident">key</span>)) } } <span class="kw">else</span> { <span class="prelude-val">None</span> } } <span class="ident">WindowEvent::CursorMoved</span> { <span class="ident">position</span>, .. } => <span class="prelude-val">Some</span>(<span class="ident">Event::MouseMovedTo</span>( <span class="ident">position</span>.<span class="ident">to_logical</span>(<span class="ident">scale_factor</span>).<span class="ident">into</span>(), )), <span class="ident">WindowEvent::MouseWheel</span> { <span class="ident">delta</span>, .. } => <span class="kw">match</span> <span class="ident">delta</span> { <span class="comment">// "In the beginning" a spinnable mouse wheel was the only input hardware for</span> <span class="comment">// scrolling. Each "increment" of the mouse wheel indicated that the application</span> <span class="comment">// should scroll one line of text.</span> <span class="comment">//</span> <span class="comment">// Since the advent of touchpads and tablets, much finer grained scrolling is used,</span> <span class="comment">// and consequently some input systems started expressing scroll distances from such</span> <span class="comment">// input devices in "pixels" rather than "lines".</span> <span class="comment">//</span> <span class="comment">// However some backends (e.g. x11) will express all scrolling as `LineDelta` — on</span> <span class="comment">// those systems, touchpad drags will simply be scaled to some presumed equivalent</span> <span class="comment">// number of lines.</span> <span class="comment">//</span> <span class="comment">// Widgetry expresses all scrolling in terms of MouseWheelScroll, which uses</span> <span class="comment">// "Lines".</span> <span class="comment">//</span> <span class="comment">// Anymore "a line" usually doesn't correspond to "a literal line of text" in the</span> <span class="comment">// application, and must usually just be considered an abstract unit of</span> <span class="comment">// measurement, because of things like configurable scroll sensitivity, variable</span> <span class="comment">// text size, and the aforementioned advent of touchpads.</span> <span class="comment">//</span> <span class="comment">// With "Reverse" scrolling, positive values indicate upward or rightward scrolling.</span> <span class="comment">// With "Natural" scrolling, it's the opposite.</span> <span class="ident">MouseScrollDelta::LineDelta</span>(<span class="ident">dx</span>, <span class="ident">dy</span>) => { <span class="kw">if</span> <span class="ident">dx</span> <span class="op">==</span> <span class="number">0.0</span> <span class="op">&&</span> <span class="ident">dy</span> <span class="op">==</span> <span class="number">0.0</span> { <span class="prelude-val">None</span> } <span class="kw">else</span> { <span class="prelude-val">Some</span>(<span class="ident">Event::MouseWheelScroll</span>(<span class="ident">f64::from</span>(<span class="ident">dx</span>), <span class="ident">f64::from</span>(<span class="ident">dy</span>))) } } <span class="ident">MouseScrollDelta::PixelDelta</span>(<span class="ident">pos</span>) => { <span class="comment">// Widgetry expresses all scroll activity in units of "lines", so convert from</span> <span class="comment">// a PixelDelta to a LineDelta.</span> <span class="comment">// This scale factor is just a guess - but feels about right.</span> <span class="kw">let</span> <span class="ident">scale_factor</span> <span class="op">=</span> <span class="number">0.01</span>; <span class="prelude-val">Some</span>(<span class="ident">Event::MouseWheelScroll</span>( <span class="ident">scale_factor</span> <span class="op">*</span> <span class="ident">pos</span>.<span class="ident">x</span>, <span class="ident">scale_factor</span> <span class="op">*</span> <span class="ident">pos</span>.<span class="ident">y</span>, )) } }, <span class="ident">WindowEvent::Resized</span>(<span class="ident">size</span>) => { <span class="prelude-val">Some</span>(<span class="ident">Event::WindowResized</span>(<span class="ident">size</span>.<span class="ident">to_logical</span>(<span class="ident">scale_factor</span>).<span class="ident">into</span>())) } <span class="ident">WindowEvent::Focused</span>(<span class="ident">gained</span>) => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">gained</span> { <span class="ident">Event::WindowGainedCursor</span> } <span class="kw">else</span> { <span class="ident">Event::WindowLostCursor</span> }), <span class="kw">_</span> => <span class="prelude-val">None</span>, } } } <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Hash</span>, <span class="ident">Debug</span>)]</span> <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Key</span> { <span class="comment">// Case is unspecified.</span> <span class="comment">// TODO Would be cool to represent A and UpperA, but then release semantics get weird... hold</span> <span class="comment">// shift and A, release shift -- does that trigger a Release(UpperA) and a Press(A)?</span> <span class="ident">A</span>, <span class="ident">B</span>, <span class="ident">C</span>, <span class="ident">D</span>, <span class="ident">E</span>, <span class="ident">F</span>, <span class="ident">G</span>, <span class="ident">H</span>, <span class="ident">I</span>, <span class="ident">J</span>, <span class="ident">K</span>, <span class="ident">L</span>, <span class="ident">M</span>, <span class="ident">N</span>, <span class="ident">O</span>, <span class="ident">P</span>, <span class="ident">Q</span>, <span class="ident">R</span>, <span class="ident">S</span>, <span class="ident">T</span>, <span class="ident">U</span>, <span class="ident">V</span>, <span class="ident">W</span>, <span class="ident">X</span>, <span class="ident">Y</span>, <span class="ident">Z</span>, <span class="comment">// Numbers (not the numpad)</span> <span class="ident">Num1</span>, <span class="ident">Num2</span>, <span class="ident">Num3</span>, <span class="ident">Num4</span>, <span class="ident">Num5</span>, <span class="ident">Num6</span>, <span class="ident">Num7</span>, <span class="ident">Num8</span>, <span class="ident">Num9</span>, <span class="ident">Num0</span>, <span class="comment">// symbols</span> <span class="comment">// TODO shift+number keys</span> <span class="ident">LeftBracket</span>, <span class="ident">RightBracket</span>, <span class="ident">Space</span>, <span class="ident">Slash</span>, <span class="ident">Dot</span>, <span class="ident">Comma</span>, <span class="ident">Semicolon</span>, <span class="ident">Colon</span>, <span class="ident">Equals</span>, <span class="ident">SingleQuote</span>, <span class="comment">// Stuff without a straightforward single-character display</span> <span class="ident">Escape</span>, <span class="ident">Enter</span>, <span class="ident">Tab</span>, <span class="ident">Backspace</span>, <span class="ident">LeftShift</span>, <span class="ident">LeftControl</span>, <span class="ident">LeftAlt</span>, <span class="ident">RightAlt</span>, <span class="ident">LeftArrow</span>, <span class="ident">RightArrow</span>, <span class="ident">UpArrow</span>, <span class="ident">DownArrow</span>, <span class="ident">F1</span>, <span class="ident">F2</span>, <span class="ident">F3</span>, <span class="ident">F4</span>, <span class="ident">F5</span>, <span class="ident">F6</span>, <span class="ident">F7</span>, <span class="ident">F8</span>, <span class="ident">F9</span>, <span class="ident">F10</span>, <span class="ident">F11</span>, <span class="ident">F12</span>, } <span class="kw">impl</span> <span class="ident">Key</span> { <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">NUM_KEYS</span>: [<span class="ident">Key</span>; <span class="number">9</span>] <span class="op">=</span> [ <span class="ident">Key::Num1</span>, <span class="ident">Key::Num2</span>, <span class="ident">Key::Num3</span>, <span class="ident">Key::Num4</span>, <span class="ident">Key::Num5</span>, <span class="ident">Key::Num6</span>, <span class="ident">Key::Num7</span>, <span class="ident">Key::Num8</span>, <span class="ident">Key::Num9</span>, ]; <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_char</span>(<span class="self">self</span>, <span class="ident">shift_pressed</span>: <span class="ident">bool</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">char</span><span class="op">></span> { <span class="kw">match</span> <span class="self">self</span> { <span class="ident">Key::A</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'A'</span> } <span class="kw">else</span> { <span class="string">'a'</span> }), <span class="ident">Key::B</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'B'</span> } <span class="kw">else</span> { <span class="string">'b'</span> }), <span class="ident">Key::C</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'C'</span> } <span class="kw">else</span> { <span class="string">'c'</span> }), <span class="ident">Key::D</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'D'</span> } <span class="kw">else</span> { <span class="string">'d'</span> }), <span class="ident">Key::E</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'E'</span> } <span class="kw">else</span> { <span class="string">'e'</span> }), <span class="ident">Key::F</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'F'</span> } <span class="kw">else</span> { <span class="string">'f'</span> }), <span class="ident">Key::G</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'G'</span> } <span class="kw">else</span> { <span class="string">'g'</span> }), <span class="ident">Key::H</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'H'</span> } <span class="kw">else</span> { <span class="string">'h'</span> }), <span class="ident">Key::I</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'I'</span> } <span class="kw">else</span> { <span class="string">'i'</span> }), <span class="ident">Key::J</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'J'</span> } <span class="kw">else</span> { <span class="string">'j'</span> }), <span class="ident">Key::K</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'K'</span> } <span class="kw">else</span> { <span class="string">'k'</span> }), <span class="ident">Key::L</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'L'</span> } <span class="kw">else</span> { <span class="string">'l'</span> }), <span class="ident">Key::M</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'M'</span> } <span class="kw">else</span> { <span class="string">'m'</span> }), <span class="ident">Key::N</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'N'</span> } <span class="kw">else</span> { <span class="string">'n'</span> }), <span class="ident">Key::O</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'O'</span> } <span class="kw">else</span> { <span class="string">'o'</span> }), <span class="ident">Key::P</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'P'</span> } <span class="kw">else</span> { <span class="string">'p'</span> }), <span class="ident">Key::Q</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'Q'</span> } <span class="kw">else</span> { <span class="string">'q'</span> }), <span class="ident">Key::R</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'R'</span> } <span class="kw">else</span> { <span class="string">'r'</span> }), <span class="ident">Key::S</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'S'</span> } <span class="kw">else</span> { <span class="string">'s'</span> }), <span class="ident">Key::T</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'T'</span> } <span class="kw">else</span> { <span class="string">'t'</span> }), <span class="ident">Key::U</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'U'</span> } <span class="kw">else</span> { <span class="string">'u'</span> }), <span class="ident">Key::V</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'V'</span> } <span class="kw">else</span> { <span class="string">'v'</span> }), <span class="ident">Key::W</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'W'</span> } <span class="kw">else</span> { <span class="string">'w'</span> }), <span class="ident">Key::X</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'X'</span> } <span class="kw">else</span> { <span class="string">'x'</span> }), <span class="ident">Key::Y</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'Y'</span> } <span class="kw">else</span> { <span class="string">'y'</span> }), <span class="ident">Key::Z</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'Z'</span> } <span class="kw">else</span> { <span class="string">'z'</span> }), <span class="ident">Key::Num1</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'!'</span> } <span class="kw">else</span> { <span class="string">'1'</span> }), <span class="ident">Key::Num2</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'@'</span> } <span class="kw">else</span> { <span class="string">'2'</span> }), <span class="ident">Key::Num3</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'#'</span> } <span class="kw">else</span> { <span class="string">'3'</span> }), <span class="ident">Key::Num4</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'$'</span> } <span class="kw">else</span> { <span class="string">'4'</span> }), <span class="ident">Key::Num5</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'%'</span> } <span class="kw">else</span> { <span class="string">'5'</span> }), <span class="ident">Key::Num6</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'^'</span> } <span class="kw">else</span> { <span class="string">'6'</span> }), <span class="ident">Key::Num7</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'&'</span> } <span class="kw">else</span> { <span class="string">'7'</span> }), <span class="ident">Key::Num8</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'*'</span> } <span class="kw">else</span> { <span class="string">'8'</span> }), <span class="ident">Key::Num9</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'('</span> } <span class="kw">else</span> { <span class="string">'9'</span> }), <span class="ident">Key::Num0</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">')'</span> } <span class="kw">else</span> { <span class="string">'0'</span> }), <span class="ident">Key::LeftBracket</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'{'</span> } <span class="kw">else</span> { <span class="string">'['</span> }), <span class="ident">Key::RightBracket</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'}'</span> } <span class="kw">else</span> { <span class="string">']'</span> }), <span class="ident">Key::Space</span> => <span class="prelude-val">Some</span>(<span class="string">' '</span>), <span class="ident">Key::Slash</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'?'</span> } <span class="kw">else</span> { <span class="string">'/'</span> }), <span class="ident">Key::Dot</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'>'</span> } <span class="kw">else</span> { <span class="string">'.'</span> }), <span class="ident">Key::Comma</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'<'</span> } <span class="kw">else</span> { <span class="string">','</span> }), <span class="ident">Key::Semicolon</span> => <span class="prelude-val">Some</span>(<span class="string">';'</span>), <span class="ident">Key::Colon</span> => <span class="prelude-val">Some</span>(<span class="string">':'</span>), <span class="ident">Key::Equals</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'+'</span> } <span class="kw">else</span> { <span class="string">'='</span> }), <span class="ident">Key::SingleQuote</span> => <span class="prelude-val">Some</span>(<span class="kw">if</span> <span class="ident">shift_pressed</span> { <span class="string">'"'</span> } <span class="kw">else</span> { <span class="string">'\''</span> }), <span class="ident">Key::Escape</span> <span class="op">|</span> <span class="ident">Key::Enter</span> <span class="op">|</span> <span class="ident">Key::Tab</span> <span class="op">|</span> <span class="ident">Key::Backspace</span> <span class="op">|</span> <span class="ident">Key::LeftShift</span> <span class="op">|</span> <span class="ident">Key::LeftControl</span> <span class="op">|</span> <span class="ident">Key::LeftAlt</span> <span class="op">|</span> <span class="ident">Key::RightAlt</span> <span class="op">|</span> <span class="ident">Key::LeftArrow</span> <span class="op">|</span> <span class="ident">Key::RightArrow</span> <span class="op">|</span> <span class="ident">Key::UpArrow</span> <span class="op">|</span> <span class="ident">Key::DownArrow</span> <span class="op">|</span> <span class="ident">Key::F1</span> <span class="op">|</span> <span class="ident">Key::F2</span> <span class="op">|</span> <span class="ident">Key::F3</span> <span class="op">|</span> <span class="ident">Key::F4</span> <span class="op">|</span> <span class="ident">Key::F5</span> <span class="op">|</span> <span class="ident">Key::F6</span> <span class="op">|</span> <span class="ident">Key::F7</span> <span class="op">|</span> <span class="ident">Key::F8</span> <span class="op">|</span> <span class="ident">Key::F9</span> <span class="op">|</span> <span class="ident">Key::F10</span> <span class="op">|</span> <span class="ident">Key::F11</span> <span class="op">|</span> <span class="ident">Key::F12</span> => <span class="prelude-val">None</span>, } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">describe</span>(<span class="self">self</span>) -> <span class="ident">String</span> { <span class="kw">match</span> <span class="self">self</span> { <span class="ident">Key::Escape</span> => <span class="string">"Escape"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::Enter</span> => <span class="string">"Enter"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::Tab</span> => <span class="string">"Tab"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::Backspace</span> => <span class="string">"Backspace"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::LeftShift</span> => <span class="string">"Shift"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::LeftControl</span> => <span class="string">"left Control"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::LeftAlt</span> => <span class="string">"left Alt"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::RightAlt</span> => <span class="string">"right Alt"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::LeftArrow</span> => <span class="string">"← arrow"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::RightArrow</span> => <span class="string">"→ arrow"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::UpArrow</span> => <span class="string">"↑"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::DownArrow</span> => <span class="string">"↓"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F1</span> => <span class="string">"F1"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F2</span> => <span class="string">"F2"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F3</span> => <span class="string">"F3"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F4</span> => <span class="string">"F4"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F5</span> => <span class="string">"F5"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F6</span> => <span class="string">"F6"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F7</span> => <span class="string">"F7"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F8</span> => <span class="string">"F8"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F9</span> => <span class="string">"F9"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F10</span> => <span class="string">"F10"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F11</span> => <span class="string">"F11"</span>.<span class="ident">to_string</span>(), <span class="ident">Key::F12</span> => <span class="string">"F12"</span>.<span class="ident">to_string</span>(), <span class="comment">// These have to_char, but override here</span> <span class="ident">Key::Space</span> => <span class="string">"Space"</span>.<span class="ident">to_string</span>(), <span class="kw">_</span> => <span class="self">self</span>.<span class="ident">to_char</span>(<span class="bool-val">false</span>).<span class="ident">unwrap</span>().<span class="ident">to_string</span>(), } } <span class="kw">fn</span> <span class="ident">from_winit_key</span>(<span class="ident">input</span>: <span class="ident">KeyboardInput</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Key</span><span class="op">></span> { <span class="kw">let</span> <span class="ident">key</span> <span class="op">=</span> <span class="ident">input</span>.<span class="ident">virtual_keycode</span><span class="question-mark">?</span>; <span class="prelude-val">Some</span>(<span class="kw">match</span> <span class="ident">key</span> { <span class="ident">VirtualKeyCode::A</span> => <span class="ident">Key::A</span>, <span class="ident">VirtualKeyCode::B</span> => <span class="ident">Key::B</span>, <span class="ident">VirtualKeyCode::C</span> => <span class="ident">Key::C</span>, <span class="ident">VirtualKeyCode::D</span> => <span class="ident">Key::D</span>, <span class="ident">VirtualKeyCode::E</span> => <span class="ident">Key::E</span>, <span class="ident">VirtualKeyCode::F</span> => <span class="ident">Key::F</span>, <span class="ident">VirtualKeyCode::G</span> => <span class="ident">Key::G</span>, <span class="ident">VirtualKeyCode::H</span> => <span class="ident">Key::H</span>, <span class="ident">VirtualKeyCode::I</span> => <span class="ident">Key::I</span>, <span class="ident">VirtualKeyCode::J</span> => <span class="ident">Key::J</span>, <span class="ident">VirtualKeyCode::K</span> => <span class="ident">Key::K</span>, <span class="ident">VirtualKeyCode::L</span> => <span class="ident">Key::L</span>, <span class="ident">VirtualKeyCode::M</span> => <span class="ident">Key::M</span>, <span class="ident">VirtualKeyCode::N</span> => <span class="ident">Key::N</span>, <span class="ident">VirtualKeyCode::O</span> => <span class="ident">Key::O</span>, <span class="ident">VirtualKeyCode::P</span> => <span class="ident">Key::P</span>, <span class="ident">VirtualKeyCode::Q</span> => <span class="ident">Key::Q</span>, <span class="ident">VirtualKeyCode::R</span> => <span class="ident">Key::R</span>, <span class="ident">VirtualKeyCode::S</span> => <span class="ident">Key::S</span>, <span class="ident">VirtualKeyCode::T</span> => <span class="ident">Key::T</span>, <span class="ident">VirtualKeyCode::U</span> => <span class="ident">Key::U</span>, <span class="ident">VirtualKeyCode::V</span> => <span class="ident">Key::V</span>, <span class="ident">VirtualKeyCode::W</span> => <span class="ident">Key::W</span>, <span class="ident">VirtualKeyCode::X</span> => <span class="ident">Key::X</span>, <span class="ident">VirtualKeyCode::Y</span> => <span class="ident">Key::Y</span>, <span class="ident">VirtualKeyCode::Z</span> => <span class="ident">Key::Z</span>, <span class="ident">VirtualKeyCode::Key1</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad1</span> => <span class="ident">Key::Num1</span>, <span class="ident">VirtualKeyCode::Key2</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad2</span> => <span class="ident">Key::Num2</span>, <span class="ident">VirtualKeyCode::Key3</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad3</span> => <span class="ident">Key::Num3</span>, <span class="ident">VirtualKeyCode::Key4</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad4</span> => <span class="ident">Key::Num4</span>, <span class="ident">VirtualKeyCode::Key5</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad5</span> => <span class="ident">Key::Num5</span>, <span class="ident">VirtualKeyCode::Key6</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad6</span> => <span class="ident">Key::Num6</span>, <span class="ident">VirtualKeyCode::Key7</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad7</span> => <span class="ident">Key::Num7</span>, <span class="ident">VirtualKeyCode::Key8</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad8</span> => <span class="ident">Key::Num8</span>, <span class="ident">VirtualKeyCode::Key9</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad9</span> => <span class="ident">Key::Num9</span>, <span class="ident">VirtualKeyCode::Key0</span> <span class="op">|</span> <span class="ident">VirtualKeyCode::Numpad0</span> => <span class="ident">Key::Num0</span>, <span class="ident">VirtualKeyCode::LBracket</span> => <span class="ident">Key::LeftBracket</span>, <span class="ident">VirtualKeyCode::RBracket</span> => <span class="ident">Key::RightBracket</span>, <span class="ident">VirtualKeyCode::Space</span> => <span class="ident">Key::Space</span>, <span class="ident">VirtualKeyCode::Slash</span> => <span class="ident">Key::Slash</span>, <span class="ident">VirtualKeyCode::Period</span> => <span class="ident">Key::Dot</span>, <span class="ident">VirtualKeyCode::Comma</span> => <span class="ident">Key::Comma</span>, <span class="ident">VirtualKeyCode::Semicolon</span> => <span class="ident">Key::Semicolon</span>, <span class="ident">VirtualKeyCode::Colon</span> => <span class="ident">Key::Colon</span>, <span class="ident">VirtualKeyCode::Equals</span> => <span class="ident">Key::Equals</span>, <span class="ident">VirtualKeyCode::Apostrophe</span> => <span class="ident">Key::SingleQuote</span>, <span class="ident">VirtualKeyCode::Escape</span> => <span class="ident">Key::Escape</span>, <span class="ident">VirtualKeyCode::Return</span> => <span class="ident">Key::Enter</span>, <span class="ident">VirtualKeyCode::Tab</span> => <span class="ident">Key::Tab</span>, <span class="ident">VirtualKeyCode::Back</span> => <span class="ident">Key::Backspace</span>, <span class="ident">VirtualKeyCode::LShift</span> => <span class="ident">Key::LeftShift</span>, <span class="ident">VirtualKeyCode::LControl</span> => <span class="ident">Key::LeftControl</span>, <span class="ident">VirtualKeyCode::LAlt</span> => <span class="ident">Key::LeftAlt</span>, <span class="ident">VirtualKeyCode::RAlt</span> => <span class="ident">Key::RightAlt</span>, <span class="ident">VirtualKeyCode::Left</span> => <span class="ident">Key::LeftArrow</span>, <span class="ident">VirtualKeyCode::Right</span> => <span class="ident">Key::RightArrow</span>, <span class="ident">VirtualKeyCode::Up</span> => <span class="ident">Key::UpArrow</span>, <span class="ident">VirtualKeyCode::Down</span> => <span class="ident">Key::DownArrow</span>, <span class="ident">VirtualKeyCode::F1</span> => <span class="ident">Key::F1</span>, <span class="ident">VirtualKeyCode::F2</span> => <span class="ident">Key::F2</span>, <span class="ident">VirtualKeyCode::F3</span> => <span class="ident">Key::F3</span>, <span class="ident">VirtualKeyCode::F4</span> => <span class="ident">Key::F4</span>, <span class="ident">VirtualKeyCode::F5</span> => <span class="ident">Key::F5</span>, <span class="ident">VirtualKeyCode::F6</span> => <span class="ident">Key::F6</span>, <span class="ident">VirtualKeyCode::F7</span> => <span class="ident">Key::F7</span>, <span class="ident">VirtualKeyCode::F8</span> => <span class="ident">Key::F8</span>, <span class="ident">VirtualKeyCode::F9</span> => <span class="ident">Key::F9</span>, <span class="ident">VirtualKeyCode::F10</span> => <span class="ident">Key::F10</span>, <span class="ident">VirtualKeyCode::F11</span> => <span class="ident">Key::F11</span>, <span class="ident">VirtualKeyCode::F12</span> => <span class="ident">Key::F12</span>, <span class="kw">_</span> => { <span class="macro">println!</span>(<span class="string">"Unknown winit key {:?}"</span>, <span class="ident">key</span>); <span class="kw">return</span> <span class="prelude-val">None</span>; } }) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">txt</span>(<span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&</span><span class="ident">EventCtx</span>) -> <span class="ident">TextSpan</span> { <span class="ident">Line</span>(<span class="self">self</span>.<span class="ident">describe</span>()).<span class="ident">fg</span>(<span class="ident">ctx</span>.<span class="ident">style</span>().<span class="ident">text_hotkey_color</span>) } } <span class="comment">// TODO This is not an ideal representation at all.</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Hash</span>, <span class="ident">Debug</span>)]</span> <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">MultiKey</span> { <span class="ident">Normal</span>(<span class="ident">Key</span>), <span class="ident">LCtrl</span>(<span class="ident">Key</span>), <span class="ident">Any</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">Key</span><span class="op">></span>), } <span class="kw">impl</span> <span class="ident">MultiKey</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">describe</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">String</span> { <span class="kw">match</span> <span class="self">self</span> { <span class="ident">MultiKey::Normal</span>(<span class="ident">key</span>) => <span class="ident">key</span>.<span class="ident">describe</span>(), <span class="ident">MultiKey::LCtrl</span>(<span class="ident">key</span>) => <span class="macro">format!</span>(<span class="string">"Ctrl+{}"</span>, <span class="ident">key</span>.<span class="ident">describe</span>()), <span class="ident">MultiKey::Any</span>(<span class="kw-2">ref</span> <span class="ident">keys</span>) => <span class="ident">keys</span> .<span class="ident">iter</span>() .<span class="ident">map</span>(<span class="op">|</span><span class="ident">k</span><span class="op">|</span> <span class="ident">k</span>.<span class="ident">describe</span>()) .<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="kw">_</span><span class="op">></span><span class="op">></span>() .<span class="ident">join</span>(<span class="string">", "</span>), } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">txt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&</span><span class="ident">EventCtx</span>) -> <span class="ident">TextSpan</span> { <span class="ident">Line</span>(<span class="self">self</span>.<span class="ident">describe</span>()).<span class="ident">fg</span>(<span class="ident">ctx</span>.<span class="ident">style</span>().<span class="ident">text_hotkey_color</span>) } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">lctrl</span>(<span class="ident">key</span>: <span class="ident">Key</span>) -> <span class="ident">MultiKey</span> { <span class="ident">MultiKey::LCtrl</span>(<span class="ident">key</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">hotkeys</span>(<span class="ident">keys</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Key</span><span class="op">></span>) -> <span class="ident">MultiKey</span> { <span class="ident">MultiKey::Any</span>(<span class="ident">keys</span>) } <span class="kw">impl</span> <span class="ident">std::convert::From</span><span class="op"><</span><span class="ident">Key</span><span class="op">></span> <span class="kw">for</span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">MultiKey</span><span class="op">></span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">key</span>: <span class="ident">Key</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">MultiKey</span><span class="op">></span> { <span class="prelude-val">Some</span>(<span class="ident">MultiKey::Normal</span>(<span class="ident">key</span>)) } } <span class="kw">impl</span> <span class="ident">std::convert::From</span><span class="op"><</span><span class="ident">Key</span><span class="op">></span> <span class="kw">for</span> <span class="ident">MultiKey</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">key</span>: <span class="ident">Key</span>) -> <span class="ident">MultiKey</span> { <span class="ident">MultiKey::Normal</span>(<span class="ident">key</span>) } } </code></pre></div> </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="widgetry" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.63.0 (4b91a6ea7 2022-08-08)" ></div> </body></html>