private void PainNewItem(FlowChatMessageItemModel messageItem)
{
Graphics g = this.CreateGraphics();
CalculateViewY();
RenderSingleItem(g, ref messageItem);
}
public void RemoveMessageItem(FlowChatMessageItemModel messageItem)
{
if (messageItem != null)
{
int index = Items.IndexOf(messageItem);
for (int i = index; i < Items.Count; i++)
{
ClearItemArea(Items[i]);
y -= 66;
PainNewItem(Items[i]);
}
}
}
private void RenderSingleItem(Graphics g, ref FlowChatMessageItemModel item)
{
Rectangle itemRect = new Rectangle(0, y, Width, 70);
Color color = Color.Black;
if (item.IsClick)
{
color = Color.FromArgb(200, 199, 197);
}
else if (item.IsFocus)
{
color = Color.FromArgb(215, 216, 218);
}
else
{
color = Color.FromArgb(233, 232, 230);
}
g.FillRectangle(new SolidBrush(color), itemRect);
Rectangle avatarRect = new Rectangle(15, view_y + 15, 40, 40);
if (File.Exists(item.ImageUrl))
{
g.DrawImage(new Bitmap(item.ImageUrl), avatarRect);
}
else
{
g.DrawImage(new Bitmap("./Images/avatar-default.png"), avatarRect);
}
Rectangle textRect = new Rectangle(66, view_y + 20, 140, 14);
g.DrawString(item.MessagerName, new Font(FontFamily.GenericMonospace, 10, FontStyle.Regular), Brushes.Black, textRect);
Rectangle chatTextRect = new Rectangle(66, view_y + 40, 140, 14);
g.DrawString(item.LastMessageText, new Font(FontFamily.GenericMonospace, 9, FontStyle.Regular), new SolidBrush(Color.FromArgb(177, 178, 180)), chatTextRect);
Rectangle timeTextRect = new Rectangle(Width - 47 - 15, view_y + 17, 47, 14);
g.DrawString(item.LastMessageTime, new Font(FontFamily.GenericMonospace, 10, FontStyle.Regular), new SolidBrush(Color.FromArgb(177, 178, 180)), timeTextRect);
y += 66;
item.Rect = itemRect;
}
protected override void OnMouseClick(MouseEventArgs e)
{
for (int i = 0; i < Items.Count; i++)
{
if (e.X > Items[i].Rect.X && e.X <Items[i].Rect.X + Items[i].Rect.Width &&
e.Y> Items[i].Rect.Y && e.Y < Items[i].Rect.Y + Items[i].Rect.Height)
{
if (lastClickItem != null)
{
lastClickItem.IsClick = false;
}
Items[i].IsClick = true;
lastClickItem = Items[i];
Invalidate();
SelectedMessageItemChanged?.Invoke(this, lastMouseMoveItem);
break;
}
}
}
protected override void OnMouseMove(MouseEventArgs e)
{
for (int i = 0; i < Items.Count; i++)
{
if (e.X > Items[i].Rect.X && e.X <Items[i].Rect.X + Items[i].Rect.Width &&
e.Y> Items[i].Rect.Y && e.Y < Items[i].Rect.Y + Items[i].Rect.Height)
{
if (lastMouseMoveItem != null)
{
lastMouseMoveItem.IsFocus = false;
}
Items[i].IsFocus = true;
lastMouseMoveItem = Items[i];
Invalidate();
break;
}
else
{
Items[i].IsFocus = false;
Invalidate();
}
}
}
private void ClearItemArea(FlowChatMessageItemModel messageItem)
{
Graphics g = CreateGraphics();
g.FillRectangle(Brushes.Transparent, messageItem.Rect);
}
public void AddMessageItem(FlowChatMessageItemModel messageItem)
{
Items.Add(messageItem);
PainNewItem(messageItem);
}
