74 lines
2.5 KiB
Go
74 lines
2.5 KiB
Go
package ui
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import "github.com/gdamore/tcell/v2"
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// DrawRect renders a filled box at `x` and `y`, of size `width` and `height`.
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// Will not call `Show()`.
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func DrawRect(s tcell.Screen, x, y, width, height int, char rune, style tcell.Style) {
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for col := x; col < x+width; col++ {
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for row := y; row < y+height; row++ {
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s.SetContent(col, row, char, nil, style)
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}
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}
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}
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// DrawStr will render each character of a string at `x` and `y`.
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func DrawStr(s tcell.Screen, x, y int, str string, style tcell.Style) {
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runes := []rune(str)
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for idx, r := range runes {
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s.SetContent(x+idx, y, r, nil, style)
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}
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}
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// DrawQuickCharStr renders a string very similar to how DrawStr works, but stylizes the
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// quick char (any rune after an underscore) with an underline. Returned is the number of
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// columns that were drawn to the screen. This is useful to know the length of the string
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// drawn, minus the underscore.
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func DrawQuickCharStr(s tcell.Screen, x, y int, str string, style tcell.Style) int {
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runes := []rune(str)
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col := 0
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for i := 0; i < len(runes); i++ {
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r := runes[i]
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if r == '_' && i+1 < len(runes) {
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i++
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sty := style.Underline(true)
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s.SetContent(x+col, y, runes[i], nil, sty)
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} else {
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s.SetContent(x+col, y, r, nil, style)
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}
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col++
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}
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return col
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}
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// DrawRectOutline draws only the outline of a rectangle, using `ul`, `ur`, `bl`, and `br`
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// for the corner runes, and `hor` and `vert` for the horizontal and vertical runes, respectively.
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func DrawRectOutline(s tcell.Screen, x, y, _width, _height int, ul, ur, bl, br, hor, vert rune, style tcell.Style) {
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width := x + _width - 1 // Length across
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height := y + _height - 1 // Length top-to-bottom
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// Horizontals and verticals
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for col := x + 1; col < width; col++ {
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s.SetContent(col, y, hor, nil, style) // Top line
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s.SetContent(col, height, hor, nil, style) // Bottom line
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}
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for row := y + 1; row < height; row++ {
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s.SetContent(x, row, vert, nil, style) // Left line
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s.SetContent(width, row, vert, nil, style) // Right line
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}
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// Corners
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s.SetContent(x, y, ul, nil, style)
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s.SetContent(width, y, ur, nil, style)
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s.SetContent(x, height, bl, nil, style)
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s.SetContent(width, height, br, nil, style)
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}
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// DrawRectOutlineDefault calls DrawRectOutline with the default edge runes.
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func DrawRectOutlineDefault(s tcell.Screen, x, y, width, height int, style tcell.Style) {
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DrawRectOutline(s, x, y, width, height, '┌', '┐', '└', '┘', '─', '│', style)
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}
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// TODO: add DrawShadow(x, y, width, height int)
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// TODO: add DrawWindow(x, y, width, height int, style tcell.Style)
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