113 lines
3.5 KiB
C#
113 lines
3.5 KiB
C#
using System;
|
|
using global::System.Drawing;
|
|
using global::System.Runtime.InteropServices;
|
|
using global::System.Windows.Forms;
|
|
|
|
namespace Pilz.Updating.GUIBase
|
|
{
|
|
internal static class BaseFeatures
|
|
{
|
|
[DllImport("user32")]
|
|
private static extern uint SendMessage(IntPtr hWnd, uint msg, uint wParam, uint lParam);
|
|
|
|
private const int BCM_FIRST = 0x1600; // Normal button
|
|
private const int BCM_SETSHIELD = BCM_FIRST + 0xC; // Elevated button
|
|
|
|
public static void AddShieldToButton(Button b)
|
|
{
|
|
b.FlatStyle = FlatStyle.System;
|
|
SendMessage(b.Handle, BCM_SETSHIELD, 0, 0xFFFFFFFFU);
|
|
}
|
|
|
|
// Return a bitmap containing the UAC shield.
|
|
private static Bitmap shield_bm = null;
|
|
|
|
public static Bitmap GetUacShieldImage()
|
|
{
|
|
if (shield_bm is object)
|
|
{
|
|
return shield_bm;
|
|
}
|
|
|
|
const int WID = 50;
|
|
const int HGT = 50;
|
|
const int MARGIN = 4;
|
|
|
|
// Make the button. For some reason, it must
|
|
// have text or the UAC shield won't appear.
|
|
var btn = new Button();
|
|
btn.Text = " ";
|
|
btn.Size = new Size(WID, HGT);
|
|
AddShieldToButton(btn);
|
|
|
|
// Draw the button onto a bitmap.
|
|
var bm = new Bitmap(WID, HGT);
|
|
btn.Refresh();
|
|
btn.DrawToBitmap(bm, new Rectangle(0, 0, WID, HGT));
|
|
|
|
// Find the part containing the shield.
|
|
int min_x = WID;
|
|
int max_x = 0;
|
|
int min_y = HGT;
|
|
int max_y = 0;
|
|
|
|
// Fill on the left.
|
|
int y = MARGIN;
|
|
while (y < HGT - MARGIN)
|
|
{
|
|
// Get the leftmost pixel's color.
|
|
var target_color = bm.GetPixel(MARGIN, y);
|
|
|
|
// Fill in with this color as long as we see the target.
|
|
int x = MARGIN;
|
|
while (x < WID - MARGIN)
|
|
{
|
|
// See if this pixel is part of the shield.
|
|
if (bm.GetPixel(x, y).Equals(target_color))
|
|
{
|
|
// It's not part of the shield.
|
|
// Clear the pixel.
|
|
bm.SetPixel(x, y, Color.Transparent);
|
|
}
|
|
else
|
|
{
|
|
// It's part of the shield.
|
|
if (min_y > y)
|
|
{
|
|
min_y = y;
|
|
}
|
|
|
|
if (min_x > x)
|
|
{
|
|
min_x = x;
|
|
}
|
|
|
|
if (max_y < y)
|
|
{
|
|
max_y = y;
|
|
}
|
|
|
|
if (max_x < x)
|
|
{
|
|
max_x = x;
|
|
}
|
|
}
|
|
|
|
x += 1;
|
|
}
|
|
|
|
y += 1;
|
|
}
|
|
|
|
// Clip out the shield part.
|
|
int shield_wid = max_x - min_x + 1;
|
|
int shield_hgt = max_y - min_y + 1;
|
|
shield_bm = new Bitmap(shield_wid, shield_hgt);
|
|
var shield_gr = Graphics.FromImage(shield_bm);
|
|
shield_gr.DrawImage(bm, 0, 0, new Rectangle(min_x, min_y, shield_wid, shield_hgt), GraphicsUnit.Pixel);
|
|
|
|
// Return the shield.
|
|
return shield_bm;
|
|
}
|
|
}
|
|
} |