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18 changed files with 3 additions and 1165 deletions
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package raygui
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import (
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"fmt"
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"github.com/gen2brain/raylib-go/raylib"
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)
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// comboboxColoring describes the per-state colors for a Combobox control.
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type comboboxColoring struct {
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Border Property
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Inside Property
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List Property
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Text Property
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}
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// comboboxColors lists the styling for each supported state.
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var comboboxColors = map[ControlState]comboboxColoring{
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Normal: {ComboboxDefaultBorderColor, ComboboxDefaultInsideColor, ComboboxDefaultListTextColor, ComboboxDefaultTextColor},
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Clicked: {ComboboxDefaultBorderColor, ComboboxDefaultInsideColor, ComboboxDefaultListTextColor, ComboboxDefaultTextColor},
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Focused: {ComboboxHoverBorderColor, ComboboxHoverInsideColor, ComboboxHoverListTextColor, ComboboxHoverTextColor},
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Pressed: {ComboboxPressedBorderColor, ComboboxPressedInsideColor, ComboboxPressedListTextColor, ComboboxPressedTextColor},
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}
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// ComboBox draws a simplified version of a ComboBox allowing the user to select a string
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// from a list accompanied by an N/M counter. The widget does not provide a drop-down/completion
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// or any input support.
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func ComboBox(bounds rl.Rectangle, comboText []string, active int) int {
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// Reject invalid selections and disable rendering.
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comboCount := len(comboText)
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if active < 0 || active >= comboCount {
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rl.TraceLog(rl.LogWarning, "ComboBox active expects 0 <= active <= %d", comboCount)
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return -1
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}
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// Calculate text dimensions.
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textHeight := GetStyle32(GlobalTextFontsize)
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activeText := comboText[active]
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textWidth := rl.MeasureText(activeText, textHeight)
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// Ensure box is large enough.
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ConstrainRectangle(&bounds, textWidth, textWidth+GetStyle32(ToggleTextPadding), textHeight, textHeight+GetStyle32(ToggleTextPadding))
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b := bounds.ToInt32()
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// Generate the worst-case sizing of the counter so we can avoid resizing it as the numbers go up/down.
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clickWidth := rl.MeasureText(fmt.Sprintf("%d/%d", comboCount, comboCount), b.Height)
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// Counter shows the index of the selection and the maximum number, e.g. "1/3".
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counter := rl.NewRectangle(bounds.X+bounds.Width+float32(style[ComboboxPadding]), bounds.Y, float32(clickWidth), float32(b.Height))
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c := counter.ToInt32()
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// Determine if the user is interacting with the control, and if so, which state it is in.
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state := GetInteractionState(bounds, counter)
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colors, exists := comboboxColors[state]
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if !exists {
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return active
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}
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// Update the control when the user releases the mouse over it.
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if state == Clicked {
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// increment but wrap to 0 on reaching end-of-list.
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active = (active + 1) % comboCount
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}
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// Render the box itself
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DrawBorderedRectangle(b, GetStyle32(ComboboxBorderWidth), GetStyleColor(colors.Border), GetStyleColor(colors.Inside))
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rl.DrawText(activeText, b.X+((b.Width/2)-(rl.MeasureText(activeText, textHeight)/2)), b.Y+((b.Height/2)-(textHeight/2)), textHeight, GetStyleColor(colors.Text))
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// Render the accompanying "clicks" box showing the element counter.
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DrawBorderedRectangle(c, GetStyle32(ComboboxBorderWidth), GetStyleColor(colors.Border), GetStyleColor(colors.Inside))
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counterText := fmt.Sprintf("%d/%d", active+1, comboCount)
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rl.DrawText(counterText, c.X+((c.Width/2)-(rl.MeasureText(counterText, textHeight)/2)), c.Y+((c.Height/2)-(textHeight/2)), textHeight, GetStyleColor(colors.List))
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return active
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}
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