93 lines
1.8 KiB
Go
93 lines
1.8 KiB
Go
// Package events manages mouse and keyboard SDL events for Doodle.
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package events
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import (
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"strings"
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)
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// State keeps track of event states.
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type State struct {
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// Mouse buttons.
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Button1 *BoolTick // left
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Button2 *BoolTick // right
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Button3 *BoolTick // middle
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EscapeKey *BoolTick
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EnterKey *BoolTick
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ShiftActive *BoolTick
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ControlActive *BoolTick
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KeyName *StringTick
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Up *BoolTick
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Left *BoolTick
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Right *BoolTick
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Down *BoolTick
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// Cursor positions.
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CursorX *Int32Tick
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CursorY *Int32Tick
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// Window events: window has changed size.
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Resized *BoolTick
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}
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// New creates a new event state manager.
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func New() *State {
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return &State{
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Button1: &BoolTick{},
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Button2: &BoolTick{},
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Button3: &BoolTick{},
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EscapeKey: &BoolTick{},
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EnterKey: &BoolTick{},
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ShiftActive: &BoolTick{},
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ControlActive: &BoolTick{},
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KeyName: &StringTick{},
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Up: &BoolTick{},
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Left: &BoolTick{},
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Right: &BoolTick{},
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Down: &BoolTick{},
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CursorX: &Int32Tick{},
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CursorY: &Int32Tick{},
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Resized: &BoolTick{},
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}
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}
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// ReadKey returns the normalized key symbol being pressed,
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// taking the Shift key into account. QWERTY keyboard only, probably.
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func (ev *State) ReadKey() string {
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if key := ev.KeyName.Read(); key != "" {
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if ev.ShiftActive.Pressed() {
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if symbol, ok := shiftMap[key]; ok {
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return symbol
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}
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return strings.ToUpper(key)
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}
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return key
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}
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return ""
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}
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// shiftMap maps keys to their Shift versions.
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var shiftMap = map[string]string{
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"`": "~",
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"1": "!",
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"2": "@",
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"3": "#",
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"4": "$",
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"5": "%",
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"6": "^",
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"7": "&",
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"8": "*",
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"9": "(",
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"0": ")",
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"-": "_",
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"=": "+",
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"[": "{",
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"]": "}",
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`\`: "|",
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";": ":",
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`'`: `"`,
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",": "<",
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".": ">",
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"/": "?",
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}
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