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Native window decorations: support autohide taskbar

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This commit is contained in:
Karl Tauber
2021-02-22 22:57:43 +01:00
parent e41c91a42b
commit b244f80f81
1 changed files with 42 additions and 2 deletions
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44
flatlaf-native-jna/src/main/java/com/formdev/flatlaf/nativejna/windows/FlatWindowsNativeWindowBorder.java
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@@ -16,6 +16,7 @@
package com.formdev.flatlaf.nativejna.windows;
import static com.sun.jna.platform.win32.ShellAPI.*;
import static com.sun.jna.platform.win32.WinUser.*;
import java.awt.Dialog;
import java.awt.Frame;
@@ -37,12 +38,15 @@ import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.Structure.FieldOrder;
import com.sun.jna.platform.win32.BaseTSD;
import com.sun.jna.platform.win32.Shell32;
import com.sun.jna.platform.win32.User32;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.win32.WinDef.LPARAM;
import com.sun.jna.platform.win32.WinDef.LRESULT;
import com.sun.jna.platform.win32.WinDef.RECT;
import com.sun.jna.platform.win32.WinDef.UINT_PTR;
import com.sun.jna.platform.win32.WinDef.WPARAM;
import com.sun.jna.platform.win32.WinUser.HMONITOR;
import com.sun.jna.platform.win32.WinUser.WindowProc;
import com.sun.jna.win32.W32APIOptions;
@@ -166,6 +170,9 @@ public class FlatWindowsNativeWindowBorder
HTCAPTION = 2,
HTTOP = 12;
private static final int ABS_AUTOHIDE = 0x0000001;
private static final int ABM_GETAUTOHIDEBAREX = 0x0000000b;
private Window window;
private final HWND hwnd;
private final BaseTSD.LONG_PTR defaultWndProc;
@@ -279,9 +286,30 @@ public class FlatWindowsNativeWindowBorder
// do not appear because you don't need them (because you can't resize
// a window when it's maximized unless you restore it).
params.rgrc[0].top += getResizeHandleHeight();
}
//TODO support autohide taskbar
// check whether taskbar is in the autohide state
APPBARDATA autohide = new APPBARDATA();
autohide.cbSize = new DWORD( autohide.size() );
int state = Shell32.INSTANCE.SHAppBarMessage( new DWORD( ABM_GETSTATE ), autohide ).intValue();
if( (state & ABS_AUTOHIDE) != 0 ) {
// get monitor info
// (using MONITOR_DEFAULTTONEAREST finds right monitor when restoring from minimized)
HMONITOR hMonitor = User32.INSTANCE.MonitorFromWindow( hwnd, MONITOR_DEFAULTTONEAREST );
MONITORINFO monitorInfo = new MONITORINFO();
User32.INSTANCE.GetMonitorInfo( hMonitor, monitorInfo );
// If there's a taskbar on any side of the monitor, reduce our size
// a little bit on that edge.
if( hasAutohideTaskbar( ABE_TOP, monitorInfo.rcMonitor ) )
params.rgrc[0].top++;
if( hasAutohideTaskbar( ABE_BOTTOM, monitorInfo.rcMonitor ) )
params.rgrc[0].bottom--;
if( hasAutohideTaskbar( ABE_LEFT, monitorInfo.rcMonitor ) )
params.rgrc[0].left++;
if( hasAutohideTaskbar( ABE_RIGHT, monitorInfo.rcMonitor ) )
params.rgrc[0].right--;
}
}
// write changed params back to native memory
params.write();
@@ -350,6 +378,18 @@ public class FlatWindowsNativeWindowBorder
+ User32Ex.INSTANCE.GetSystemMetricsForDpi( SM_CYSIZEFRAME, dpi );
}
/**
* Returns whether there is an autohide taskbar on the given edge.
*/
private boolean hasAutohideTaskbar( int edge, RECT rcMonitor ) {
APPBARDATA data = new APPBARDATA();
data.cbSize = new DWORD( data.size() );
data.uEdge = new UINT( edge );
data.rc = rcMonitor;
UINT_PTR hTaskbar = Shell32.INSTANCE.SHAppBarMessage( new DWORD( ABM_GETAUTOHIDEBAREX ), data );
return hTaskbar.longValue() != 0;
}
/**
* Scales down in the same way as AWT.
* See AwtWin32GraphicsDevice::ScaleDownX()