func (mw *MyMainWindow) drawStuff(canvas *walk.Canvas, updateBounds walk.Rectangle) error {
bmp, err := createBitmap()
if err != nil {
return err
}
defer bmp.Dispose()
bounds := mw.paintWidget.ClientBounds()
rectPen, err := walk.NewCosmeticPen(walk.PenSolid, walk.RGB(255, 0, 0))
if err != nil {
return err
}
defer rectPen.Dispose()
if err := canvas.DrawRectangle(rectPen, bounds); err != nil {
return err
}
ellipseBrush, err := walk.NewHatchBrush(walk.RGB(0, 255, 0), walk.HatchCross)
if err != nil {
return err
}
defer ellipseBrush.Dispose()
if err := canvas.FillEllipse(ellipseBrush, bounds); err != nil {
return err
}
linesBrush, err := walk.NewSolidColorBrush(walk.RGB(0, 0, 255))
if err != nil {
return err
}
defer linesBrush.Dispose()
linesPen, err := walk.NewGeometricPen(walk.PenDash, 8, linesBrush)
if err != nil {
return err
}
defer linesPen.Dispose()
if err := canvas.DrawLine(linesPen, walk.Point{bounds.X, bounds.Y}, walk.Point{bounds.Width, bounds.Height}); err != nil {
return err
}
if err := canvas.DrawLine(linesPen, walk.Point{bounds.X, bounds.Height}, walk.Point{bounds.Width, bounds.Y}); err != nil {
return err
}
bmpSize := bmp.Size()
if err := canvas.DrawImage(bmp, walk.Point{(bounds.Width - bmpSize.Width) / 2, (bounds.Height - bmpSize.Height) / 2}); err != nil {
return err
}
return nil
}
func main() {
rand.Seed(time.Now().UnixNano())
model := NewFooModel()
MainWindow{
Title: "Walk TableView Example",
Size: Size{800, 600},
Layout: VBox{},
Children: []Widget{
PushButton{
Text: "Reset Rows",
OnClicked: model.ResetRows,
},
TableView{
AlternatingRowBGColor: walk.RGB(255, 255, 224),
CheckBoxes: true,
ColumnsOrderable: true,
Columns: []TableViewColumn{
{Title: "#"},
{Title: "Bar"},
{Title: "Baz", Format: "%.2f", Alignment: AlignFar},
{Title: "Quux", Format: "2006-01-02 15:04:05", Width: 150},
},
Model: model,
},
},
}.Run()
}
func createBitmap() (*walk.Bitmap, error) {
bounds := walk.Rectangle{Width: 200, Height: 200}
bmp, err := walk.NewBitmap(bounds.Size())
if err != nil {
return nil, err
}
succeeded := false
defer func() {
if !succeeded {
bmp.Dispose()
}
}()
canvas, err := walk.NewCanvasFromImage(bmp)
if err != nil {
return nil, err
}
defer canvas.Dispose()
brushBmp, err := walk.NewBitmapFromFile("../img/plus.png")
if err != nil {
return nil, err
}
defer brushBmp.Dispose()
brush, err := walk.NewBitmapBrush(brushBmp)
if err != nil {
return nil, err
}
defer brush.Dispose()
if err := canvas.FillRectangle(brush, bounds); err != nil {
return nil, err
}
font, err := walk.NewFont("Times New Roman", 40, walk.FontBold|walk.FontItalic)
if err != nil {
return nil, err
}
defer font.Dispose()
if err := canvas.DrawText("Walk Drawing Example", font, walk.RGB(0, 0, 0), bounds, walk.TextWordbreak); err != nil {
return nil, err
}
succeeded = true
return bmp, nil
}
func NewMyWidget(parent walk.Container) (*MyWidget, error) {
w := new(MyWidget)
if err := walk.InitWidget(
w,
parent,
myWidgetWindowClass,
win.WS_VISIBLE,
0); err != nil {
return nil, err
}
bg, err := walk.NewSolidColorBrush(walk.RGB(0, 255, 0))
if err != nil {
return nil, err
}
w.SetBackground(bg)
return w, nil
}