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