dialog

README

dialog

Simple cross-platform dialog API for go-lang

examples

ok := dialog.Message("%s", "Do you want to continue?").Title("Are you sure?").YesNo()

Creates a dialog box titled "Are you sure?", containing the message "Do you want to continue?", a "Yes" button and a "No" button. Returns true iff the dialog could be displayed and the user pressed the "Yes" button.

filename, err := dialog.File().Filter("Mp3 audio file", "mp3").Load()

Creates a file selection dialog allowing the user to select a .mp3 file. The absolute path of the file is returned, unless an error is encountered or the user cancels/closes the dialog. In the latter case, filename will be the empty string and err will equal dialog.Cancelled.

filename, err := dialog.File().Filter("XML files", "xml").Title("Export to XML").Save()

Asks the user for a filename to write data into. If the user selects a file which already exists, an additional dialog is spawned to confirm they want to overwrite the existing file.

directory, err := dialog.Directory().Title("Load images").Browse()

Asks the user for a directory.

platform details

• OSX: uses Cocoa's NSAlert/NSSavePanel/NSOpenPanel clasess
• Win32: uses MessageBox/GetOpenFileName/GetSaveFileName (via package github.com/AllenDang/w32)
• Linux: uses Gtk's MessageDialog/FileChooserDialog (via package github.com/mattn/gtk)

Documentation

Overview

Package dialog provides a simple cross-platform common dialog API.

Eg. to prompt the user with a yes/no dialog:

if dialog.MsgDlg("%s", "Do you want to continue?").YesNo() {
    // user pressed Yes
}

The general usage pattern is to call one of the toplevel *Dlg functions which return a *Builder structure. From here you can optionally call configuration functions (eg. Title) to customise the dialog, before using a launcher function to run the dialog.

Index

• Variables
• type DirectoryBuilder
  • func Directory() *DirectoryBuilder
  • func (b *DirectoryBuilder) Browse() (string, error)
  • func (b *DirectoryBuilder) Title(title string) *DirectoryBuilder
• type Dlg
• type FileBuilder
  • func File() *FileBuilder
  • func (b *FileBuilder) Filter(desc string, extensions ...string) *FileBuilder
  • func (b *FileBuilder) Load() (string, error)
  • func (b *FileBuilder) Save() (string, error)
  • func (b *FileBuilder) SetStartDir(startDir string) *FileBuilder
  • func (b *FileBuilder) Title(title string) *FileBuilder
• type FileFilter
• type MsgBuilder
  • func Message(format string, args ...interface{}) *MsgBuilder
  • func (b *MsgBuilder) Error()
  • func (b *MsgBuilder) Icon(filename string) *MsgBuilder
  • func (b *MsgBuilder) Info()
  • func (b *MsgBuilder) Title(title string) *MsgBuilder
  • func (b *MsgBuilder) YesNo() bool

Variables

var Cancelled = errors.New("Cancelled")

Cancelled is an error returned when a user cancels/closes a dialog.

Types

type DirectoryBuilder

type DirectoryBuilder struct {
	Dlg
	StartDir string
}

func Directory

func Directory() *DirectoryBuilder

Directory initialises a DirectoryBuilder using the default configuration.

func (*DirectoryBuilder) Browse

func (b *DirectoryBuilder) Browse() (string, error)

Browse spawns the directory selection dialog using the configured settings,

asking the user to select a single folder. Returns Cancelled as the error if the user cancels or closes the dialog.

func (*DirectoryBuilder) Title

func (b *DirectoryBuilder) Title(title string) *DirectoryBuilder

Title specifies the title to be used for the dialog.

type Dlg

type Dlg struct {
	Title string
}

type FileBuilder

type FileBuilder struct {
	Dlg
	StartDir string
	Filters  []FileFilter
}

func File

func File() *FileBuilder

File initialises a FileBuilder using the default configuration.

func (*FileBuilder) Filter

func (b *FileBuilder) Filter(desc string, extensions ...string) *FileBuilder

Filter adds a category of files to the types allowed by the dialog. Multiple

calls to Filter are cumulative - any of the provided categories will be allowed. By default all files can be selected.

The special extension '*' allows all files to be selected when the Filter is active.

func (*FileBuilder) Load

func (b *FileBuilder) Load() (string, error)

Load spawns the file selection dialog using the configured settings,

asking the user to select a single file. Returns Cancelled as the error if the user cancels or closes the dialog.

func (*FileBuilder) Save

func (b *FileBuilder) Save() (string, error)

Save spawns the file selection dialog using the configured settings,

asking the user for a filename to save as. If the chosen file exists, the user is prompted whether they want to overwrite the file. Returns Cancelled as the error if the user cancels/closes the dialog, or selects not to overwrite the file.

func (*FileBuilder) SetStartDir

func (b *FileBuilder) SetStartDir(startDir string) *FileBuilder

SetStartDir specifies the initial directory of the dialog.

func (*FileBuilder) Title

func (b *FileBuilder) Title(title string) *FileBuilder

Title specifies the title to be used for the dialog.

type FileFilter

type FileFilter struct {
	Desc       string
	Extensions []string
}

FileFilter represents a category of files (eg. audio files, spreadsheets).

type MsgBuilder

type MsgBuilder struct {
	Dlg
	Msg      string
	IconPath string
}

func Message

func Message(format string, args ...interface{}) *MsgBuilder

Message initialises a MsgBuilder with the provided message

func (*MsgBuilder) Error

func (b *MsgBuilder) Error()

Error spawns the message dialog with an error icon and single button, "Ok".

func (*MsgBuilder) Icon

func (b *MsgBuilder) Icon(filename string) *MsgBuilder

func (*MsgBuilder) Info

func (b *MsgBuilder) Info()

Info spawns the message dialog with an information icon and single button, "Ok".

func (*MsgBuilder) Title

func (b *MsgBuilder) Title(title string) *MsgBuilder

Title specifies what the title of the message dialog will be

func (*MsgBuilder) YesNo

func (b *MsgBuilder) YesNo() bool

YesNo spawns the message dialog with two buttons, "Yes" and "No".

Returns true iff the user selected "Yes".