forked from ying32/govcl
/
Form1Impl.go
159 lines (125 loc) · 4.57 KB
/
Form1Impl.go
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// 在这里写你的事件
package main
import (
"fmt"
"math"
"strings"
"github.com/ying32/govcl/vcl/types/colors"
"github.com/ying32/govcl/vcl"
"github.com/ying32/govcl/vcl/types"
)
//::private::
type TForm1Fields struct {
}
// 这个例了是改的原来网上一个Delphi的TListBox自绘的，
// 原地址： https://blog.csdn.net/nhconch/article/details/205127
func (f *TForm1) OnFormCreate(sender vcl.IObject) {
f.ScreenCenter()
// 这里为显示，手动设置，一般可以设计器时设置
f.LstLeft.SetStyle(types.LbOwnerDrawFixed)
f.LstLeft.SetItemHeight(90)
f.LstLeft.Items().Add("第一项")
f.LstLeft.Items().Add("第二项")
f.LstLeft.Items().Add("第三项")
f.LstLeft.Items().Add("第四项")
f.LstRight.SetStyle(types.LbOwnerDrawFixed)
f.LstRight.SetItemHeight(53)
for i := int32(0); i < 20; i++ {
f.LstRight.Items().Add(fmt.Sprintf("ListBox Item of %d\nSecond of %d\nThird of %d", i, i, i))
}
}
func (f *TForm1) OnFormShow(object vcl.IObject) {
f.LstLeft.SetItemIndex(0)
f.LstLeft.Repaint()
f.LstRight.SetItemIndex(0)
f.LstRight.Repaint()
}
func (f *TForm1) OnFormDestroy(sender vcl.IObject) {
}
func (f *TForm1) OnLstLeftDrawItem(control vcl.IWinControl, index int32, aRect types.TRect, state types.TOwnerDrawState) {
r := types.TRect{}
canvas := f.LstLeft.Canvas()
brush := canvas.Brush()
pen := canvas.Pen()
font := canvas.Font()
//设置填充的背景颜色并填充背景
brush.SetColor(colors.ClWhite)
canvas.FillRect(aRect)
//绘制圆角矩形
if state.In(types.OdSelected) {
pen.SetColor(0xFFB2B5) //选中项的圆角矩形颜色
} else {
pen.SetColor(colors.ClSilver) //未选中项的圆角矩形颜色
}
brush.SetStyle(types.BsClear)
r = types.TRect{Left: aRect.Left + 3, Top: aRect.Top + 3, Right: aRect.Right - 3, Bottom: aRect.Bottom - 3}
canvas.RoundRect(r.Left, r.Top, r.Right, r.Bottom, 10, 10)
//画出图标
if state.In(types.OdSelected) {
pic := f.Image1.Picture()
canvas.Draw(r.Left+(r.Right-r.Left-pic.Width())/2, r.Top+2, pic.Graphic()) //选中项的图像
} else {
pic := f.Image2.Picture()
canvas.Draw(r.Left+(r.Right-r.Left-pic.Width())/2, r.Top+2, pic.Graphic()) //未选中项的图像
}
//填充文字区背景
r.Top = r.Bottom - int32(math.Abs(float64(font.Height()))) - 4
brush.SetStyle(types.BsSolid)
if state.In(types.OdSelected) {
brush.SetColor(0xFFB2B5) //选中项的背景颜色
} else {
brush.SetColor(colors.ClSilver) //未选中项的背景颜色
}
canvas.FillRect(r)
//输出文字，仅支持单行
font.SetColor(colors.ClBlack)
//计算文字顶点位置， 水平，垂直居中，文字超出绘制圆点
r.Top += 2
canvas.TextRect2(&r, f.LstLeft.Items().S(index), types.NewSet(types.TfVerticalCenter, types.TfCenter, types.TfWordEllipsis))
//画焦点虚框，当系统再绘制时，变成XOR运算，从而达到擦除焦点虚框的目的
if state.In(types.OdFocused) {
canvas.DrawFocusRect(aRect)
}
}
func (f *TForm1) OnLstRightDrawItem(control vcl.IWinControl, index int32, aRect types.TRect, state types.TOwnerDrawState) {
canvas := f.LstRight.Canvas()
brush := canvas.Brush()
pen := canvas.Pen()
font := canvas.Font()
//文字颜色
font.SetColor(colors.ClBlack)
//设置背景颜色并填充背景
brush.SetColor(colors.ClWhite)
canvas.FillRect(aRect)
//设置圆角矩形颜色并画出圆角矩形
brush.SetColor(types.TColor(0x00FFF7F7))
pen.SetColor(types.TColor(0x00131315))
canvas.RoundRect(aRect.Left+3, aRect.Top+3, aRect.Right-2, aRect.Bottom-2, 8, 8)
//以不同的宽度和高度再画一次，实现立体效果
canvas.RoundRect(aRect.Left+3, aRect.Top+3, aRect.Right-3, aRect.Bottom-3, 5, 5)
//如果是当前选中项
if state.In(types.OdSelected) {
//以不同的背景色画出选中项的圆角矩形
brush.SetColor(types.TColor(0x00FFB2B5))
canvas.RoundRect(aRect.Left+3, aRect.Top+3, aRect.Right-3, aRect.Bottom-3, 5, 5)
//选中项的文字颜色
font.SetColor(colors.ClBlue)
//如果当前项拥有焦点，画焦点虚框，当系统再绘制时变成XOR运算从而达到擦除焦点虚框的目的
if state.In(types.OdFocused) {
canvas.DrawFocusRect(aRect)
}
}
idx := 0
if index%2 != 0 {
idx = 1
}
//画出图标
f.ImageList1.Draw(canvas, aRect.Left+7, aRect.Top+(f.LstRight.ItemHeight()-f.ImageList1.Height())/2, int32(idx), true)
//分别绘出三行文字
sArr := strings.Split(f.LstRight.Items().S(index), "\n")
if len(sArr) == 3 {
canvas.TextOut(aRect.Left+32+10, aRect.Top+4, sArr[0])
canvas.TextOut(aRect.Left+32+10, aRect.Top+18, sArr[1])
canvas.TextOut(aRect.Left+32+10, aRect.Top+32, sArr[2])
}
}