package d2gui import ( "errors" "image/color" "github.com/OpenDiablo2/OpenDiablo2/d2core/d2asset" "github.com/OpenDiablo2/OpenDiablo2/d2core/d2input" "github.com/OpenDiablo2/OpenDiablo2/d2core/d2render" ) type buttonState int const ( buttonStateDefault buttonState = iota buttonStatePressed buttonStateToggled buttonStatePressedToggled ) type Button struct { widgetBase width int height int state buttonState surfaces []d2render.Surface } func createButton(text string, buttonStyle ButtonStyle) (*Button, error) { config, ok := buttonStyleConfigs[buttonStyle] if !ok { return nil, errors.New("invalid button style") } animation, err := d2asset.LoadAnimation(config.animationPath, config.palettePath) if err != nil { return nil, err } var buttonWidth int for i := 0; i < config.segmentsX; i++ { w, _, err := animation.GetFrameSize(i) if err != nil { return nil, err } buttonWidth += w } var buttonHeight int for i := 0; i < config.segmentsY; i++ { _, h, err := animation.GetFrameSize(i * config.segmentsY) if err != nil { return nil, err } buttonHeight += h } font, err := loadFont(config.fontStyle) if err != nil { return nil, err } textColor := color.RGBA{R: 0x64, G: 0x64, B: 0x64, A: 0xff} textWidth, textHeight := font.GetTextMetrics(text) textX := buttonWidth/2 - textWidth/2 textY := buttonHeight/2 - textHeight/2 + config.textOffset surfaceCount := animation.GetFrameCount() / (config.segmentsX * config.segmentsY) surfaces := make([]d2render.Surface, surfaceCount) for i := 0; i < surfaceCount; i++ { surface, err := d2render.NewSurface(buttonWidth, buttonHeight, d2render.FilterNearest) if err != nil { return nil, err } if err := renderSegmented(animation, config.segmentsX, config.segmentsY, i, surface); err != nil { return nil, err } font.SetColor(textColor) var textOffsetX, textOffsetY int switch buttonState(i) { case buttonStatePressed, buttonStatePressedToggled: textOffsetX = -2 textOffsetY = 2 } surface.PushTranslation(textX+textOffsetX, textY+textOffsetY) err = font.RenderText(text, surface) surface.Pop() if err != nil { return nil, err } surfaces[i] = surface } button := &Button{width: buttonWidth, height: buttonHeight, surfaces: surfaces} button.SetVisible(true) return button, nil } func (b *Button) onMouseButtonDown(event d2input.MouseEvent) bool { b.state = buttonStatePressed return false } func (b *Button) onMouseButtonUp(event d2input.MouseEvent) bool { b.state = buttonStateDefault return false } func (b *Button) onMouseLeave(event d2input.MouseMoveEvent) bool { b.state = buttonStateDefault return false } func (b *Button) render(target d2render.Surface) error { return target.Render(b.surfaces[b.state]) } func (b *Button) getSize() (int, int) { return b.width, b.height }