//开始画图，更改文本及状态量
private void StartDrawingButton_Click(object sender, EventArgs e)
{
try
{
PolyLineLengthLabel.Text = "折线长度：NaN (m)";
ResultLabel.Text = "点位：";
DrawingTipLabel.Text = "左键绘点，右键撤销，双击或按F2结束绘制。请绘制第1个点，按Esc取消";
DrawGroupBox.Enabled = false;
PolyLineCalcGroupBox.Enabled = false;
FileGroupBox.Enabled = false;
PlotPointPictureBox.Cursor = CrossCur;
Line.Points.Clear();
EditStateButton.CheckState = CheckState.Unchecked;
PolyLineDrawing.ClearPictureBox(PlotPointPictureBox);
PlotPointPictureBox.Image = new Bitmap(PlotPointPictureBox.Width, PlotPointPictureBox.Height);
IsDrawing = true;
CurrentPoint = 0;
PlotPointPictureBox.Cursor = CrossCur;
EditStateButton.Enabled = false;
}
catch (Exception err)
{
MessageBoxes.Error(err.Message);
}
}
//清空画板
private void ClearPictureBoxButton_Click(object sender, EventArgs e)
{
PolyLineDrawing.ClearPictureBox(PlotPointPictureBox);
Line.Points.Clear();
DrawingTipLabel.Text = "已清空，点击“开始画线”开始绘制，点击“从文件读取折线”或直接拖拽数据文件到窗体以加载数据";
Restore();
}
//画图
private void PlotPictureBox_MouseClick(object sender, MouseEventArgs e)
{
//正在画图，根据鼠标点击键位增删点
if (IsDrawing)
{
//左键添加
if (e.Button == MouseButtons.Left)
{
Line.Points.Add(new PlotPoint {
X = e.X, Y = e.Y
});
CurrentPoint++;
DrawingTipLabel.Text = "请绘制第" + Convert.ToString(CurrentPoint + 1) + "个点，或按Esc取消绘制，双击或按F2结束绘制";
ClearAndDraw();
}
//右键删除
if (e.Button == MouseButtons.Right)
{
if (CurrentPoint == 0)
{
DrawingTipLabel.Text = "绘制被用户取消";
PolyLineDrawing.ClearPictureBox(PlotPointPictureBox);
Line.Points.Clear();
PolyLineLengthLabel.Text = "折线长度：NaN (m)";
ResultLabel.Text = "点位：";
Restore();
}
else
{
Line.Points.RemoveAt(CurrentPoint - 1);
CurrentPoint--;
DrawingTipLabel.Text = "撤销绘制，请绘制第" + Convert.ToString(CurrentPoint + 1) + "个点，或按Esc取消绘制";
ClearAndDraw();
}
}
}
//编辑状态右键删除点
if (IsEditing && IsPointSelected && !IsPointMoving)
{
if (e.Button == MouseButtons.Right)
{
DeletePoint();
if (Line.Points.Count < 1)
{
SelectedPointIndex = -1;
IsPointSelected = false;
PlotPointPictureBox.Cursor = Cursors.No;
DrawingTipLabel.Text = "点已被用户全部删除，请重新绘制或加载";
}
}
}
}
private void KeyAction(object sender, KeyEventArgs e)
{
//ESC取消画图
if (e.KeyCode == Keys.Escape && IsDrawing)
{
PolyLineDrawing.ClearPictureBox(PlotPointPictureBox);
Line.Points.Clear();
DrawingTipLabel.Text = "绘制被用户取消";
Restore();
}
//F2结束绘图
if (e.KeyCode == Keys.F2 && IsDrawing)
{
if (CurrentPoint == 0)
{
DrawingTipLabel.Text = "绘制被用户取消";
PolyLineDrawing.ClearPictureBox(PlotPointPictureBox);
Line.Points.Clear();
PolyLineLengthLabel.Text = "折线长度：NaN (m)";
ResultLabel.Text = "点位：";
Restore();
}
else
{
StopDrawing();
}
}
//S开始绘图
if (e.KeyCode == Keys.S && !IsDrawing)
{
StartDrawingButton.PerformClick();
}
//C清空画板
if (e.KeyCode == Keys.C && !IsDrawing)
{
ClearPictureBoxButton.PerformClick();
}
//E编辑
if (e.KeyCode == Keys.E && !IsDrawing)
{
EditStateButton.PerformClick();
}
//编辑状态下Del删除点
if (e.KeyCode == Keys.Delete && IsEditing && IsPointSelected && !IsPointMoving)
{
DeletePoint();
}
}
//窗口加载，进行初始化操作
private void PolyLinePlotPoints_Load(object sender, EventArgs e)
{
try
{
FilePathTextBox.Text = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
PolyLineCalcGroupBox.Enabled = false;
SaveToPicButton.Enabled = false;
PolyLineDrawing.ClearPictureBox(PlotPointPictureBox); //启动时清空画板
SettingsOperation(-1);
}
catch (Exception err)
{
MessageBoxes.Error(err.Message);
}
}
//清空并重绘
internal void ClearAndDraw()
{
PolyLineDrawing.ClearPictureBox(PlotPointPictureBox);
if (IsPolygonCheckBox.Checked)
{
if (Line.Points.Count > 1)
{
PolyLineDrawing.DrawPolygon(Line.Points, PlotPointPictureBox, PolygonColorPictureBox.BackColor, PolygonTransparencyTrackBar.Value * 255 / (PolygonTransparencyTrackBar.Maximum - PolygonTransparencyTrackBar.Minimum));
}
if (Line.Points.Count > 0)
{
PolyLineDrawing.DrawLines(Line.Points[Line.Points.Count - 1], Line.Points[0], PlotPointPictureBox, LineColorPictureBox.BackColor, LineWidthTrackBar.Value);
}
}
PolyLineDrawing.Draw(Line.Points, PlotPointPictureBox, PointColorPictureBox.BackColor, LineColorPictureBox.BackColor, FontColorPictureBox.BackColor, FontStyleDisplayLabel.Font, LineWidthTrackBar.Value, PointWidthTrackBar.Value);
//PlotPointPictureBox.Invalidate();
PlotPointPictureBox.Update();
//PlotPointPictureBox.Refresh();
UpdateLengthOrArea();
UpdateDataGridView();
}
