func createBitmap() *drawing.Bitmap {
bounds := drawing.Rectangle{Width: 200, Height: 200}
bmp, err := drawing.NewBitmap(bounds.Size())
panicIfErr(err)
surface, err := drawing.NewSurfaceFromImage(bmp)
panicIfErr(err)
defer surface.Dispose()
brushBmp, err := drawing.NewBitmapFromFile("img/plus.png")
panicIfErr(err)
defer brushBmp.Dispose()
brush, err := drawing.NewBitmapBrush(brushBmp)
panicIfErr(err)
defer brush.Dispose()
panicIfErr(surface.FillRectangle(brush, bounds))
font, err := drawing.NewFont("Times New Roman", 40, drawing.FontBold|drawing.FontItalic)
panicIfErr(err)
defer font.Dispose()
panicIfErr(surface.DrawText("Runtime Created Bitmap", font, drawing.RGB(0, 0, 0), bounds, drawing.TextWordbreak))
return bmp
}
func runMainWindow() {
mainWnd, err := gui.NewMainWindow()
panicIfErr(err)
defer mainWnd.Dispose()
mw := &MainWindow{MainWindow: mainWnd}
mw.ClientArea().SetLayout(gui.NewVBoxLayout())
mw.updateTitle("")
mw.imageView, err = gui.NewImageView(mw.ClientArea())
panicIfErr(err)
imageList, err := gui.NewImageList(drawing.Size{16, 16}, 0)
panicIfErr(err)
mw.ToolBar().SetImageList(imageList)
fileMenu, err := gui.NewMenu()
panicIfErr(err)
_, fileMenuAction, err := mw.Menu().Actions().AddMenu(fileMenu)
panicIfErr(err)
fileMenuAction.SetText("File")
openBmp, err := drawing.NewBitmapFromFile("img/open.png")
panicIfErr(err)
openAction := gui.NewAction()
openAction.SetImage(openBmp)
openAction.SetText("Open")
openAction.AddTriggeredHandler(func(args gui.EventArgs) { mw.openImage() })
fileMenu.Actions().Add(openAction)
mw.ToolBar().Actions().Add(openAction)
exitAction := gui.NewAction()
exitAction.SetText("Exit")
exitAction.AddTriggeredHandler(func(args gui.EventArgs) { gui.Exit(0) })
fileMenu.Actions().Add(exitAction)
helpMenu, err := gui.NewMenu()
panicIfErr(err)
_, helpMenuAction, err := mw.Menu().Actions().AddMenu(helpMenu)
panicIfErr(err)
helpMenuAction.SetText("Help")
aboutAction := gui.NewAction()
aboutAction.SetText("About")
aboutAction.AddTriggeredHandler(func(args gui.EventArgs) {
gui.MsgBox(mw, "About", "Walk Image Viewer Example", gui.MsgBoxOK|gui.MsgBoxIconInformation)
})
helpMenu.Actions().Add(aboutAction)
panicIfErr(mw.SetMinSize(drawing.Size{320, 240}))
panicIfErr(mw.SetSize(drawing.Size{800, 600}))
mw.Show()
panicIfErr(mw.RunMessageLoop())
}