Sesuaikan susun atur grid penyesuaian Fyne-Golang-php.cn

自定义 Fyne 自适应网格布局

Kandungan soalan

Saya mengubah suai bekas perpustakaan fyne.newadaptivegrid() untuk memaparkan lebar widget berdasarkan kepingan berkadar yang kami lalui. Buat masa ini, container.newadaptivegrid() memaparkan widget lebar yang sama dalam satu baris. Pada asasnya (jumlah saiz baris / widget sekarang).

Kod saya:

package main

import (
    "fmt"
    "math"

    "fyne.io/fyne/v2"
    "fyne.io/fyne/v2/app"
    "fyne.io/fyne/v2/container"
    "fyne.io/fyne/v2/theme"
    "fyne.io/fyne/v2/widget"
)

func New(layout fyne.Layout, objects ...fyne.CanvasObject) *fyne.Container {
    return fyne.NewContainerWithLayout(layout, objects...)
}

func NewAdaptiveGridWithRatios(ratios []float32, objects ...fyne.CanvasObject) *fyne.Container {
    return New(NewAdaptiveGridLayoutWithRatios(ratios), objects...)
}

// Declare conformity with Layout interface
var _ fyne.Layout = (*adaptiveGridLayoutWithRatios)(nil)

type adaptiveGridLayoutWithRatios struct {
    ratios          []float32
    adapt, vertical bool
}

func NewAdaptiveGridLayoutWithRatios(ratios []float32) fyne.Layout {
    return &adaptiveGridLayoutWithRatios{ratios: ratios, adapt: true}
}

func (g *adaptiveGridLayoutWithRatios) horizontal() bool {
    if g.adapt {
        return fyne.IsHorizontal(fyne.CurrentDevice().Orientation())
    }

    return !g.vertical
}

func (g *adaptiveGridLayoutWithRatios) countRows(objects []fyne.CanvasObject) int {
    count := 0
    for _, child := range objects {
        if child.Visible() {
            count++
        }
    }

    return int(math.Ceil(float64(count) / float64(len(g.ratios))))
}

// Get the leading (top or left) edge of a grid cell.
// size is the ideal cell size and the offset is which col or row its on.
func getLeading(size float64, offset int) float32 {
    ret := (size + float64(theme.Padding())) * float64(offset)

    return float32(ret)
}

// Get the trailing (bottom or right) edge of a grid cell.
// size is the ideal cell size and the offset is which col or row its on.
func getTrailing(size float64, offset int) float32 {
    return getLeading(size, offset+1) - theme.Padding()
}

// Layout is called to pack all child objects into a specified size.
// For a GridLayout this will pack objects into a table format with the number
// of columns specified in our constructor.
func (g *adaptiveGridLayoutWithRatios) Layout(objects []fyne.CanvasObject, size fyne.Size) {
    rows := g.countRows(objects)
    cols := len(g.ratios)
    if g.horizontal() {
        cols = rows
        rows = len(g.ratios)
    }

    padWidth := float32(cols-1) * theme.Padding()
    padHeight := float32(rows-1) * theme.Padding()
    var totalRatio float32
    for _, r := range g.ratios {
        totalRatio += r
    }

    cellWidth := (float64(size.Width) - float64(padWidth)) / float64(len(g.ratios))
    cellHeight := float64(size.Height-padHeight) / float64(rows)

    if !g.horizontal() {
        cellWidth, cellHeight = cellHeight, cellWidth
        cellWidth = float64(size.Width-padWidth) / float64(rows)
        cellHeight = float64(size.Height-padHeight) / float64(len(g.ratios))
    }

    row, col := 0, 0
    i := 0
    for _, child := range objects {
        if !child.Visible() {
            continue
        }

        //ratio := g.ratios[j%len(g.ratios)]
        cellSize := fyne.NewSize(float32(cellWidth)*g.ratios[i], float32(cellHeight))

        x1 := getLeading(float64(cellSize.Width), col)
        y1 := getLeading(float64(cellSize.Height), row)
        x2 := getTrailing(float64(cellSize.Width), col)
        y2 := getTrailing(float64(cellSize.Height), row)
        fmt.Println("1s :", x1, y1)
        fmt.Println("2s :", x2, y2)
        child.Move(fyne.NewPos(x1, y1))
        child.Resize(cellSize)

        if g.horizontal() {
            if (i+1)%cols == 0 {
                row++
                col = 0
            } else {
                col++
            }
        } else {
            if (i+1)%cols == 0 {
                col++
                row = 0
            } else {
                row++
            }
        }
        i++
    }
    fmt.Println("i :", i)
}

func (g *adaptiveGridLayoutWithRatios) MinSize(objects []fyne.CanvasObject) fyne.Size {
    minSize := fyne.NewSize(0, 0)
    return minSize
}

func main() {
    myApp := app.New()
    myWindow := myApp.NewWindow("My Windows")
    myWindow.Resize(fyne.NewSize(600, 200))

    button1 := widget.NewButton("Button 1", func() {
        // Handle button click for button 1
    })

    button2 := widget.NewButton("Button 2", func() {
        // Handle button click for button 2
    })
    button1.Importance = widget.WarningImportance
    button2.Importance = widget.DangerImportance
    title := widget.NewLabelWithStyle("Custom", fyne.TextAlignCenter, fyne.TextStyle{Bold: true})

    myWindow.SetContent(container.NewVBox(title,
        NewAdaptiveGridWithRatios([]float32{0.3, 0.7}, button1, button2)))

    myWindow.ShowAndRun()
}

Salin selepas log masuk

Saya mahu butang diletakkan bersebelahan dengan nisbah lebar relatif 3:7. Tetapi saya mendapat dua garisan mendatar, satu di bawah yang lain. Saya mengubah suai: https://github.com/fyne-io/fyne/blob/8c2509518b2df442a6b748d9b07754739592e6d7/layout/gridlayout.go Buat produk tersuai saya.

Penyelesaian

Ini berfungsi:

package main

import (
    "fmt"
    "math"

    "fyne.io/fyne/v2"
    "fyne.io/fyne/v2/app"
    "fyne.io/fyne/v2/container"
    "fyne.io/fyne/v2/theme"
    "fyne.io/fyne/v2/widget"
)

func New(layout fyne.Layout, objects ...fyne.CanvasObject) *fyne.Container {
    return fyne.NewContainerWithLayout(layout, objects...)
}

func NewAdaptiveGridWithRatios(ratios []float32, objects ...fyne.CanvasObject) *fyne.Container {
    return New(NewAdaptiveGridLayoutWithRatios(ratios), objects...)
}

// Declare conformity with Layout interface
var _ fyne.Layout = (*adaptiveGridLayoutWithRatios)(nil)

type adaptiveGridLayoutWithRatios struct {
    ratios          []float32
    adapt, vertical bool
}

func NewAdaptiveGridLayoutWithRatios(ratios []float32) fyne.Layout {
    return &adaptiveGridLayoutWithRatios{ratios: ratios, adapt: true}
}

func (g *adaptiveGridLayoutWithRatios) horizontal() bool {
    if g.adapt {
        return fyne.IsHorizontal(fyne.CurrentDevice().Orientation())
    }

    return !g.vertical
}

func (g *adaptiveGridLayoutWithRatios) countRows(objects []fyne.CanvasObject) int {
    count := 0
    for _, child := range objects {
        if child.Visible() {
            count++
        }
    }

    return int(math.Ceil(float64(count) / float64(len(g.ratios))))
}

// Layout is called to pack all child objects into a specified size.
// For a GridLayout this will pack objects into a table format with the number
// of columns specified in our constructor.
func (g *adaptiveGridLayoutWithRatios) Layout(objects []fyne.CanvasObject, size fyne.Size) {

    rows := g.countRows(objects)
    cols := len(g.ratios)

    padWidth := float32(cols-1) * theme.Padding()
    padHeight := float32(rows-1) * theme.Padding()
    tGap := float64(padWidth)
    tcellWidth := float64(size.Width) - tGap
    cellHeight := float64(size.Height-padHeight) / float64(rows)

    fmt.Println(cols, rows)
    fmt.Println(cellHeight, tcellWidth+tGap, tGap)
    fmt.Println("tcellWidth, cellHeight", tcellWidth, cellHeight)
    if !g.horizontal() {
        padWidth, padHeight = padHeight, padWidth
        tcellWidth = float64(size.Width-padWidth) - tGap
        cellHeight = float64(size.Height-padHeight) / float64(cols)
    }

    row, col := 0, 0
    i := 0
    var x1, x2, y1, y2 float32 = 0.0, 0.0, 0.0, 0.0
    fmt.Println("padWidth, padHeight, tcellWidth, cellHeight, float32(theme.Padding()):", padWidth, padHeight, tcellWidth, cellHeight, float32(theme.Padding()))
    for _, child := range objects {
        if !child.Visible() {
            continue
        }

        if i == 0 {
            x1 = 0
            y1 = 0
        } else {
            x1 = x2 + float32(theme.Padding())*float32(1)
            y1 = y2 - float32(cellHeight)
        } // float32(tGap/float64(col))
        //  (size + float64(theme.Padding())) * float64(offset)  float32(theme.Padding())*float32(1)
        x2 = x1 + float32(tcellWidth*float64(g.ratios[i]))
        y2 = float32(cellHeight)

        fmt.Println("x1,y1 :", x1, y1)
        fmt.Println("x2, y2 :", x2, y2)
        fmt.Println("eff width", tcellWidth*float64(g.ratios[i]))

        fmt.Println("------")
        child.Move(fyne.NewPos(x1, y1))
        child.Resize(fyne.NewSize((x2 - x1), y2-y1))

        if g.horizontal() {
            if (i+1)%cols == 0 {
                row++
                col = 0
            } else {
                col++
            }
        } else {
            if (i+1)%cols == 0 {
                col++
                row = 0
            } else {
                row++
            }
        }
        i++
    }
    fmt.Println("i :", i)
}

func (g *adaptiveGridLayoutWithRatios) MinSize(objects []fyne.CanvasObject) fyne.Size {
    rows := g.countRows(objects)
    minSize := fyne.NewSize(0, 0)
    for _, child := range objects {
        if !child.Visible() {
            continue
        }

        minSize = minSize.Max(child.MinSize())
    }

    if g.horizontal() {
        minContentSize := fyne.NewSize(minSize.Width*float32(len(g.ratios)), minSize.Height*float32(rows))
        return minContentSize.Add(fyne.NewSize(theme.Padding()*fyne.Max(float32(len(g.ratios)-1), 0), theme.Padding()*fyne.Max(float32(rows-1), 0)))
    }

    minContentSize := fyne.NewSize(minSize.Width*float32(rows), minSize.Height*float32(len(g.ratios)))
    return minContentSize.Add(fyne.NewSize(theme.Padding()*fyne.Max(float32(rows-1), 0), theme.Padding()*fyne.Max(float32(len(g.ratios)-1), 0)))
}

func main() {
    myApp := app.New()
    myWindow := myApp.NewWindow("My Windows Custom UI")
    myWindow.Resize(fyne.NewSize(600, 200))

    var buttons [16]*widget.Button

    for i := 0; i < 16; i++ {
        button := widget.NewButton(fmt.Sprintf("Btn %d", i+1), func() {
            // Handle button click for this button
        })

        // Set the button importance based on the button index
        if i%2 == 0 {
            button.Importance = widget.WarningImportance
        } else {
            button.Importance = widget.DangerImportance
        }

        buttons[i] = button
    }

    pgBar := widget.NewLabelWithStyle("Progress :", fyne.TextAlignCenter, fyne.TextStyle{Italic: true})
    progressBar := widget.NewProgressBar()
    progressBar.SetValue(0.95)

    myWindow.SetContent(container.NewVBox(
        NewAdaptiveGridWithRatios([]float32{0.1, 0.4, 0.4, 0.1}, buttons[0], buttons[1], buttons[2], buttons[3]),
        NewAdaptiveGridWithRatios([]float32{0.2, 0.3, 0.1, 0.4}, buttons[4], buttons[5], buttons[6], buttons[7]),
        NewAdaptiveGridWithRatios([]float32{0.6, 0.1, 0.2, 0.1}, buttons[8], buttons[9], buttons[10], buttons[11]),
        NewAdaptiveGridWithRatios([]float32{0.1, 0.4, 0.4, 0.1}, buttons[12], buttons[13], buttons[14], buttons[15]),
        NewAdaptiveGridWithRatios([]float32{0.1, 0.9}, pgBar, progressBar),
    ))

    myWindow.ShowAndRun()
}

Salin selepas log masuk

Saya menambah berbilang butang dan widget lain dalam perkadaran yang berbeza.

Atas ialah kandungan terperinci Sesuaikan susun atur grid penyesuaian Fyne. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!