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Rudimentary text selection with keybaord keys

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This commit is contained in:
Sasha Koshka
2023-02-13 12:55:51 -05:00
parent 4bc8566820
commit 21abd147bf
2 changed files with 129 additions and 82 deletions
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89
elements/basic/textbox.go
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@@ -97,16 +97,30 @@ func (element *TextBox) HandleKeyDown(key input.Key, modifiers input.Modifiers)
textChanged = true
case key == input.KeyLeft:
element.dot = textmanip.MoveLeft (
element.text,
element.dot,
modifiers.Control)
if modifiers.Shift {
element.dot = textmanip.SelectLeft (
element.text,
element.dot,
modifiers.Control)
} else {
element.dot = textmanip.MoveLeft (
element.text,
element.dot,
modifiers.Control)
}
case key == input.KeyRight:
element.dot = textmanip.MoveRight (
element.text,
element.dot,
modifiers.Control)
if modifiers.Shift {
element.dot = textmanip.SelectRight (
element.text,
element.dot,
modifiers.Control)
} else {
element.dot = textmanip.MoveRight (
element.text,
element.dot,
modifiers.Control)
}
case key.Printable():
element.text, element.dot = textmanip.Type (
@@ -299,14 +313,28 @@ func (element *TextBox) draw () {
}
pattern := element.theme.Pattern(theme.PatternSunken, state)
artist.FillRectangle(element.core, pattern, bounds)
offset := bounds.Min.Add (image.Point {
X: element.config.Padding() - element.scroll,
Y: element.config.Padding(),
})
if len(element.text) == 0 && !element.Focused() {
if element.Focused() && !element.dot.Empty() {
// draw selection bounds
accent := element.theme.Pattern (
theme.PatternAccent, state)
canon := element.dot.Canon()
start := element.valueDrawer.PositionOf(canon.Start).Add(offset)
end := element.valueDrawer.PositionOf(canon.End).Add(offset)
end.Y += element.valueDrawer.LineHeight().Round()
artist.FillRectangle (
element.core,
accent,
image.Rectangle { start, end })
}
if len(element.text) == 0 {
// draw placeholder
textBounds := element.placeholderDrawer.LayoutBounds()
offset := bounds.Min.Add (image.Point {
X: element.config.Padding(),
Y: element.config.Padding(),
})
foreground := element.theme.Pattern (
theme.PatternForeground,
theme.PatternState { Disabled: true })
@@ -317,30 +345,27 @@ func (element *TextBox) draw () {
} else {
// draw input value
textBounds := element.valueDrawer.LayoutBounds()
offset := bounds.Min.Add (image.Point {
X: element.config.Padding() - element.scroll,
Y: element.config.Padding(),
})
foreground := element.theme.Pattern (
theme.PatternForeground, state)
element.valueDrawer.Draw (
element.core,
foreground,
offset.Sub(textBounds.Min))
if element.Focused() {
// cursor
// TODO: draw selection if exists
cursorPosition := element.valueDrawer.PositionOf (
element.dot.End)
artist.Line (
element.core,
foreground, 1,
cursorPosition.Add(offset),
image.Pt (
cursorPosition.X,
cursorPosition.Y + element.valueDrawer.
LineHeight().Round()).Add(offset))
}
}
if element.Focused() && element.dot.Empty() {
// draw cursor
foreground := element.theme.Pattern (
theme.PatternForeground, state)
cursorPosition := element.valueDrawer.PositionOf (
element.dot.End)
artist.Line (
element.core,
foreground, 1,
cursorPosition.Add(offset),
image.Pt (
cursorPosition.X,
cursorPosition.Y + element.valueDrawer.
LineHeight().Round()).Add(offset))
}
}