private void RenderSingleItem(Graphics g, ref FlowChatMessageContentItemModel item)
{
int avatarLeft;
int msgLeft;
int msgTextLeft;
Color msgColor;
StringFormat sf = new StringFormat();
sf.FormatFlags = StringFormatFlags.MeasureTrailingSpaces;
float finalMsgTextWidth = g.MeasureString(item.MessageText, Font, 500).Width;
float finalMsgRectWidth = finalMsgTextWidth + MSG_BETWEEN_TEXT_AND_RECT_WIDTH * 2;
int tringleLeftUp;
int tringleLeftMid;
int tringleLeftDown;
if (item.IsMe)
{
avatarLeft = Width - 30 - 34;
msgLeft = Width - 74 - ((int)finalMsgRectWidth > MAX_MSG_RECT_WIDTH ? MAX_MSG_RECT_WIDTH : (int)finalMsgRectWidth);
msgTextLeft = Width - 83 - ((int)finalMsgTextWidth > MAX_MSG_TEXT_WIDTH ? MAX_MSG_TEXT_WIDTH : (int)finalMsgTextWidth);
msgColor = Color.FromArgb(151, 236, 119);
tringleLeftUp = Width - 74;
tringleLeftMid = Width - 69;
tringleLeftDown = Width - 74;
}
else
{
avatarLeft = 30;
msgLeft = 74;
msgTextLeft = 83;
msgColor = Color.White;
tringleLeftUp = 74;
tringleLeftMid = 69;
tringleLeftDown = 74;
}
Rectangle avatarRect = new Rectangle(avatarLeft, view_y + 15, 34, 34);
if (File.Exists(item.ImageUrl))
{
g.DrawImage(new Bitmap(item.ImageUrl), avatarRect);
}
else
{
g.DrawImage(new Bitmap("./images/avatar-default.png"), avatarRect);
}
Point[] poins = new Point[3] {
new Point(tringleLeftUp, view_y + 26),
new Point(tringleLeftMid, view_y + 30),
new Point(tringleLeftDown, view_y + 34)
};
g.FillPolygon(new SolidBrush(msgColor), poins);
Rectangle msgRect = new Rectangle(msgLeft, view_y + 14, (int)finalMsgRectWidth, 35);
g.FillRectangle(new SolidBrush(msgColor), msgRect);
Rectangle msgTextRect = new Rectangle(msgTextLeft, view_y + 24, (int)finalMsgTextWidth, 16);
g.DrawString(item.MessageText, new Font(FontFamily.GenericMonospace, 10, FontStyle.Regular), Brushes.Black, msgTextRect);
y += 50;
}
private void PaintNewItem(FlowChatMessageContentItemModel item)
{
Graphics g = CreateGraphics();
CalculateViewY();
RenderSingleItem(g, ref item);
}
public void AddNewMessage(FlowChatMessageContentItemModel item)
{
ChatItems.Add(item);
PaintNewItem(item);
}