95 lines
2.2 KiB
Go
95 lines
2.2 KiB
Go
// Copyright 2011 The Walk Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build windows
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package walk
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const spacerWindowClass = `\o/ Walk_Spacer_Class \o/`
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func init() {
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AppendToWalkInit(func() {
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MustRegisterWindowClass(spacerWindowClass)
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})
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}
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type Spacer struct {
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WidgetBase
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sizeHint96dpi Size
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layoutFlags LayoutFlags
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greedyLocallyOnly bool
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}
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type SpacerCfg struct {
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LayoutFlags LayoutFlags
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SizeHint Size // in 1/96" units
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GreedyLocallyOnly bool
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}
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func NewSpacerWithCfg(parent Container, cfg *SpacerCfg) (*Spacer, error) {
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return newSpacer(parent, cfg.LayoutFlags, cfg.SizeHint, cfg.GreedyLocallyOnly)
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}
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func newSpacer(parent Container, layoutFlags LayoutFlags, sizeHint96dpi Size, greedyLocallyOnly bool) (*Spacer, error) {
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s := &Spacer{
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layoutFlags: layoutFlags,
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sizeHint96dpi: sizeHint96dpi,
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greedyLocallyOnly: greedyLocallyOnly,
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}
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if err := InitWidget(
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s,
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parent,
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spacerWindowClass,
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0,
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0); err != nil {
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return nil, err
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}
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return s, nil
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}
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func NewHSpacer(parent Container) (*Spacer, error) {
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return newSpacer(parent, ShrinkableHorz|ShrinkableVert|GrowableHorz|GreedyHorz, Size{}, false)
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}
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func NewHSpacerFixed(parent Container, width int) (*Spacer, error) {
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return newSpacer(parent, 0, Size{width, 0}, false)
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}
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func NewVSpacer(parent Container) (*Spacer, error) {
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return newSpacer(parent, ShrinkableHorz|ShrinkableVert|GrowableVert|GreedyVert, Size{}, false)
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}
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func NewVSpacerFixed(parent Container, height int) (*Spacer, error) {
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return newSpacer(parent, 0, Size{0, height}, false)
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}
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func (s *Spacer) CreateLayoutItem(ctx *LayoutContext) LayoutItem {
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return &spacerLayoutItem{
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idealSize96dpi: s.sizeHint96dpi,
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layoutFlags: s.layoutFlags,
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greedyLocallyOnly: s.greedyLocallyOnly,
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}
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}
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type spacerLayoutItem struct {
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LayoutItemBase
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idealSize96dpi Size
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layoutFlags LayoutFlags
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greedyLocallyOnly bool
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}
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func (li *spacerLayoutItem) LayoutFlags() LayoutFlags {
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return li.layoutFlags
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}
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func (li *spacerLayoutItem) IdealSize() Size {
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return SizeFrom96DPI(li.idealSize96dpi, li.ctx.dpi)
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}
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func (li *spacerLayoutItem) MinSize() Size {
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return SizeFrom96DPI(li.idealSize96dpi, li.ctx.dpi)
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}
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