func (iv *ImageView) drawImage(surface *drawing.Surface, updateBounds drawing.Rectangle) os.Error {
if iv.image == nil {
return nil
}
bounds, err := iv.ClientBounds()
if err != nil {
return err
}
return surface.DrawImageStretched(iv.image, bounds)
}
func (mw *MainWindow) drawStuff(surface *drawing.Surface, updateBounds drawing.Rectangle) os.Error {
bmp := createBitmap()
defer bmp.Dispose()
bounds, err := mw.paintWidget.ClientBounds()
panicIfErr(err)
rectPen, err := drawing.NewCosmeticPen(drawing.PenSolid, drawing.RGB(255, 0, 0))
panicIfErr(err)
defer rectPen.Dispose()
panicIfErr(surface.DrawRectangle(rectPen, bounds))
ellipseBrush, err := drawing.NewHatchBrush(drawing.RGB(0, 255, 0), drawing.HatchCross)
panicIfErr(err)
defer ellipseBrush.Dispose()
panicIfErr(surface.FillEllipse(ellipseBrush, bounds))
linesBrush, err := drawing.NewSolidColorBrush(drawing.RGB(0, 0, 255))
panicIfErr(err)
defer linesBrush.Dispose()
linesPen, err := drawing.NewGeometricPen(drawing.PenDash, 8, linesBrush)
panicIfErr(err)
defer linesPen.Dispose()
panicIfErr(surface.DrawLine(linesPen, drawing.Point{bounds.X, bounds.Y}, drawing.Point{bounds.Width, bounds.Height}))
panicIfErr(surface.DrawLine(linesPen, drawing.Point{bounds.X, bounds.Height}, drawing.Point{bounds.Width, bounds.Y}))
bmpSize := bmp.Size()
panicIfErr(surface.DrawImage(bmp, drawing.Point{bounds.Width/2 - bmpSize.Width/2, bounds.Height/2 - bmpSize.Height/2}))
return nil
}
func (item *simpleTextItem) AddNewPart(surface *drawing.Surface, bounds drawing.Rectangle) (part part, more bool, err os.Error) {
partCount := len(item.parts)
var offset int
if partCount > 0 {
prevPart := item.parts[len(item.parts)-1]
offset = prevPart.offset + prevPart.length
}
runeCount := item.text.RuneCount()
text := item.text.Slice(offset, runeCount)
fontHeight, err := surface.FontHeight(item.font)
if err != nil {
return
}
bounds.Height = (bounds.Height / fontHeight) * fontHeight
if bounds.Height == 0 {
more = true
return
}
boundsMeasured, runesFitted, err := surface.MeasureText(text, item.font, bounds, item.format)
if err != nil {
return
}
p := &simpleTextPart{
item: item,
offset: offset,
length: runesFitted,
bounds: boundsMeasured,
}
if partCount == cap(item.parts) {
parts := make([]*simpleTextPart, partCount, partCount*2)
copy(parts, item.parts)
item.parts = parts
}
item.parts = item.parts[0 : partCount+1]
item.parts[partCount] = p
part = p
more = p.offset+p.length < runeCount
return
}
func (part *simpleTextPart) Draw(surface *drawing.Surface) os.Error {
item := part.item
text := item.text.Slice(part.offset, part.offset+part.length)
return surface.DrawText(text, item.font, item.color, part.bounds, item.format)
}