package d2ui import ( "strings" "github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface" "github.com/OpenDiablo2/OpenDiablo2/d2common/d2util" ) const ( blackAlpha70 = 0x000000C8 screenWidth = 800 screenHeight = 600 ) // static check that Tooltip implements widget var _ Widget = &Tooltip{} // Tooltip contains a label containing text with a transparent, black background type Tooltip struct { *BaseWidget lines []string label *Label backgroundColor int originX tooltipXOrigin originY tooltipYOrigin boxEnabled bool } type tooltipXOrigin = int type tooltipYOrigin = int const ( // TooltipYTop sets the Y origin of the tooltip to the top TooltipYTop tooltipYOrigin = iota // TooltipYCenter sets the Y origin of the tooltip to the center TooltipYCenter // TooltipYBottom sets the Y origin of the tooltip to the bottom TooltipYBottom ) const ( // TooltipXLeft sets the X origin of the tooltip to the left TooltipXLeft tooltipXOrigin = iota // TooltipXCenter sets the X origin of the tooltip to the center TooltipXCenter // TooltipXRight sets the X origin of the tooltip to the right TooltipXRight ) // NewTooltip creates a tooltip instance. Note here, that we need to define the // orign point of the tooltip rect using tooltipXOrigin and tooltinYOrigin func (ui *UIManager) NewTooltip(font, palette string, originX tooltipXOrigin, originY tooltipYOrigin) *Tooltip { label := ui.NewLabel(font, palette) label.Alignment = HorizontalAlignCenter base := NewBaseWidget(ui) base.SetVisible(false) res := &Tooltip{ BaseWidget: base, backgroundColor: blackAlpha70, label: label, originX: originX, originY: originY, boxEnabled: true, } res.manager = ui // cannot use ui.addWidget, because // some tooltips could be covered by another widgets ui.addTooltip(res) return res } // SetTextLines sets the tooltip text in the form of an array of strings func (t *Tooltip) SetTextLines(lines []string) { t.lines = lines } // SetText sets the tooltip text and splits \n into lines func (t *Tooltip) SetText(text string) { t.lines = strings.Split(text, "\n") } // SetBoxEnabled determines whether a black box is drawn around the text func (t *Tooltip) SetBoxEnabled(enable bool) { t.boxEnabled = enable } func (t *Tooltip) adjustCoordinatesToScreen(maxW, maxH, halfW, halfH int) (rx, ry int) { var xOffset, yOffset int switch t.originX { case TooltipXLeft: xOffset = maxW case TooltipXCenter: xOffset = halfW case TooltipXRight: xOffset = 0 } renderX := t.x if (t.x + xOffset) > screenWidth { renderX = screenWidth - xOffset } switch t.originY { case TooltipYTop: yOffset = 0 case TooltipYCenter: yOffset = halfH case TooltipYBottom: yOffset = maxH } renderY := t.y if (t.y + yOffset) > screenHeight { renderY = screenHeight - yOffset } return renderX, renderY } // GetSize returns the size of the tooltip func (t *Tooltip) GetSize() (sx, sy int) { maxW, maxH := 0, 0 for i := range t.lines { w, h := t.label.GetTextMetrics(t.lines[i]) if maxW < w { maxW = w } maxH += h } return maxW, maxH } // Render draws the tooltip func (t *Tooltip) Render(target d2interface.Surface) { maxW, maxH := t.GetSize() // nolint:gomnd // no magic numbers, their meaning is obvious halfW, halfH := maxW/2, maxH/2 renderX, renderY := t.adjustCoordinatesToScreen(maxW, maxH, halfW, halfH) target.PushTranslation(renderX, renderY) defer target.Pop() // adjust starting point of the background rect based on the origin point // as we always draw a rect from top left switch t.originX { case TooltipXLeft: target.PushTranslation(0, 0) case TooltipXCenter: target.PushTranslation(-halfW, 0) case TooltipXRight: target.PushTranslation(-maxW, 0) } defer target.Pop() switch t.originY { case TooltipYTop: target.PushTranslation(0, 0) case TooltipYCenter: target.PushTranslation(0, -halfH) case TooltipXRight: target.PushTranslation(0, -maxH) } defer target.Pop() // tooltip background if t.boxEnabled { target.DrawRect(maxW, maxH, d2util.Color(blackAlpha70)) } // text target.PushTranslation(halfW, 0) // text is centered, our box is not defer target.Pop() for i := range t.lines { t.label.SetText(t.lines[i]) _, h := t.label.GetTextMetrics(t.lines[i]) t.label.Render(target) target.PushTranslation(0, h) } target.PopN(len(t.lines)) } // Advance is a no-op func (t *Tooltip) Advance(elapsed float64) error { return nil }