summaryrefslogtreecommitdiff
blob: d9de28464178e57f580c4ee6b21ab2f08e6c12ce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
qt-bugs@ issue : 16115
applied: no
author: Lubos Lunak <l.lunak@kde.org>

See http://lists.kde.org/?t=104388858900001&r=1&w=2


--- src/kernel/qdnd_x11.cpp.sav	2003-02-05 16:09:45.000000000 +0100
+++ src/kernel/qdnd_x11.cpp	2003-02-07 16:14:49.000000000 +0100
@@ -49,13 +49,15 @@
 #include "qdragobject.h"
 #include "qobjectlist.h"
 #include "qcursor.h"
+#include "qbitmap.h"
+#include "qpainter.h"
 
 #include "qt_x11_p.h"
 
 // conflict resolution
 
-// unused, may be used again later: const int XKeyPress = KeyPress;
-// unused, may be used again later: const int XKeyRelease = KeyRelease;
+const int XKeyPress = KeyPress;
+const int XKeyRelease = KeyRelease;
 #undef KeyPress
 #undef KeyRelease
 
@@ -249,20 +251,47 @@ class QShapedPixmapWidget : public QWidg
 public:
     QShapedPixmapWidget(int screen = -1) :
 	QWidget(QApplication::desktop()->screen( screen ),
-		0, WStyle_Customize | WStyle_Tool | WStyle_NoBorder | WX11BypassWM )
+		0, WStyle_Customize | WStyle_Tool | WStyle_NoBorder | WX11BypassWM ), oldpmser( 0 ), oldbmser( 0 )
     {
     }
 
-    void setPixmap(QPixmap pm)
+    void setPixmap(QPixmap pm, QPoint hot)
     {
-	if ( pm.mask() ) {
+	int bmser = pm.mask() ? pm.mask()->serialNumber() : 0;
+	if( oldpmser == pm.serialNumber() && oldbmser == bmser
+	    && oldhot == hot )
+	    return;
+	oldpmser = pm.serialNumber();
+	oldbmser = bmser;
+	oldhot = hot;
+	bool hotspot_in = !(hot.x() < 0 || hot.y() < 0 || hot.x() >= pm.width() || hot.y() >= pm.height());
+// if the pixmap has hotspot in its area, make a "hole" in it at that position
+// this will allow XTranslateCoordinates() to find directly the window below the cursor instead
+// of finding this pixmap, and therefore there won't be needed any (slow) search for the window
+// using findRealWindow()
+	if( hotspot_in ) {
+	    QBitmap mask = pm.mask() ? *pm.mask() : QBitmap( pm.width(), pm.height());
+	    if( !pm.mask())
+		mask.fill( Qt::color1 );
+	    QPainter p( &mask );
+	    p.setPen( Qt::color0 );
+	    p.drawPoint( hot.x(), hot.y());
+	    p.end();
+    	    pm.setMask( mask );
+    	    setMask( mask );
+	} else if ( pm.mask() ) {
 	    setMask( *pm.mask() );
 	} else {
 	    clearMask();
 	}
 	resize(pm.width(),pm.height());
 	setErasePixmap(pm);
+	erase();
     }
+private:
+    int oldpmser;
+    int oldbmser;
+    QPoint oldhot;
 };
 
 QShapedPixmapWidget * qt_xdnd_deco = 0;
@@ -859,6 +888,45 @@ void QDragManager::timerEvent( QTimerEve
 	move( QCursor::pos() );
 }
 
+static bool qt_xdnd_was_move = false;
+static bool qt_xdnd_found = false;
+// check whole incoming X queue for move events
+// checking whole queue is done by always returning False in the predicate
+// if there's another move event in the queue, and there's not a mouse button
+// or keyboard or ClientMessage event before it, the current move event
+// may be safely discarded
+// this helps avoiding being overloaded by being flooded from many events
+// from the XServer
+static
+Bool qt_xdnd_predicate( Display*, XEvent* ev, XPointer )
+{
+    if( qt_xdnd_found )
+	return False;
+    if( ev->type == MotionNotify )
+    {
+	qt_xdnd_was_move = true;
+	qt_xdnd_found = true;
+    }
+    if( ev->type == ButtonPress || ev->type == ButtonRelease
+	|| ev->type == XKeyPress || ev->type == XKeyRelease
+	|| ev->type == ClientMessage )
+    {
+	qt_xdnd_was_move = false;
+	qt_xdnd_found = true;
+    }
+    return False;
+}
+
+static
+bool qt_xdnd_another_movement()
+{
+    qt_xdnd_was_move = false;
+    qt_xdnd_found = false;
+    XEvent dummy;
+    XCheckIfEvent( qt_xdisplay(), &dummy, qt_xdnd_predicate, NULL );
+    return qt_xdnd_was_move;
+}
+
 bool QDragManager::eventFilter( QObject * o, QEvent * e)
 {
     if ( beingCancelled ) {
@@ -881,8 +949,10 @@ bool QDragManager::eventFilter( QObject 
 
     if ( e->type() == QEvent::MouseMove ) {
 	QMouseEvent* me = (QMouseEvent *)e;
-	updateMode(me->stateAfter());
-	move( me->globalPos() );
+	if( !qt_xdnd_another_movement()) {
+	    updateMode(me->stateAfter());
+	    move( me->globalPos() );
+	}
 	return TRUE;
     } else if ( e->type() == QEvent::MouseButtonRelease ) {
 	qApp->removeEventFilter( this );
@@ -1106,7 +1176,7 @@ void QDragManager::move( const QPoint & 
 	delete qt_xdnd_deco;
 	qt_xdnd_deco = new QShapedPixmapWidget( screen );
     }
-    updatePixmap();
+    updatePixmap( globalPos );
 
     if ( qt_xdnd_source_sameanswer.contains( globalPos ) &&
 	 qt_xdnd_source_sameanswer.isValid() ) {
@@ -1679,7 +1749,7 @@ bool QDragManager::drag( QDragObject * o
     // qt_xdnd_source_object persists until we get an xdnd_finish message
 }
 
-void QDragManager::updatePixmap()
+void QDragManager::updatePixmap( const QPoint& cursorPos )
 {
     if ( qt_xdnd_deco ) {
 	QPixmap pm;
@@ -1694,9 +1764,8 @@ void QDragManager::updatePixmap()
 		defaultPm = new QPixmap(default_pm);
 	    pm = *defaultPm;
 	}
-	qt_xdnd_deco->setPixmap(pm);
-	qt_xdnd_deco->move(QCursor::pos()-pm_hot);
-	qt_xdnd_deco->repaint(FALSE);
+	qt_xdnd_deco->setPixmap(pm, pm_hot);
+	qt_xdnd_deco->move(cursorPos-pm_hot);
 	    //if ( willDrop ) {
 	    qt_xdnd_deco->show();
 	    //} else {
@@ -1705,4 +1774,9 @@ void QDragManager::updatePixmap()
     }
 }
 
+void QDragManager::updatePixmap()
+{
+    updatePixmap( QCursor::pos());
+}
+
 #endif // QT_NO_DRAGANDDROP
--- src/kernel/qdragobject.h.sav	2002-11-01 19:25:07.000000000 +0100
+++ src/kernel/qdragobject.h	2001-01-01 01:01:00.000000000 +0100
@@ -245,6 +245,7 @@ private:
     void move( const QPoint & );
     void drop();
     void updatePixmap();
+    void updatePixmap( const QPoint& cursorPos );
 
 private:
     QDragObject * object;