Changeset 448

Timestamp:

Jan 13, 2010, 9:14:29 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

gui: DnD: Drag party code in progress.

Location:

trunk/src/gui/kernel

Files:

• qapplication_pm.cpp (modified) (2 diffs)
• qdnd_pm.cpp (modified) (5 diffs)
• qmime.h (modified) (1 diff)

trunk/src/gui/kernel/qapplication_pm.cpp

@@ -117 +117 @@
 
 static HWND autoCaptureWnd = NULLHANDLE;
-static bool autoCaptureReleased = FALSE;
+static bool autoCaptureReleased = ;
 static void setAutoCapture(HWND); // automatic capture
 static void releaseAutoCapture();
@@ -2117 +2117 @@
 }
 #endif
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+
 
 //

trunk/src/gui/kernel/qdnd_pm.cpp

@@ -52 +52 @@
 #include "qcursor.h"
 #include "qdesktopwidget.h"
+
 #include "qdnd_p.h"
 #include "qdebug.h"
@@ -68 +69 @@
 
 #if !defined(QT_NO_DRAGANDDROP) && !defined(QT_NO_CLIPBOARD)
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+
 
 /** \internal
@@ -271 +275 @@
         return DO_MOVE;
     return DO_UNKNOWN;
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 }
 
@@ -617 +633 @@
 }
 
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+
 Qt::DropAction QDragManager::drag(QDrag *o)
 
@@ -622 +1002 @@
     DEBUG(() << "QDragManager::drag");
 
-    // @todo implement
-    return Qt::IgnoreAction;
-}
-
-void QDragManager::cancel(bool /* deleteSource */)
-{
-    // @todo implement
+    if (object == o || !o || !o->d_func()->source)
+        return Qt::IgnoreAction;
+
+    if (object) {
+        cancel();
+        qApp->removeEventFilter(this);
+        beingCancelled = false;
+    }
+
+    // detect a mouse button to end dragging
+    LONG vkTerminate = 0;
+    {
+        ULONG msg = WinQuerySysValue(HWND_DESKTOP, SV_BEGINDRAG) & 0xFFFF;
+        switch(msg) {
+            case WM_BUTTON1MOTIONSTART: vkTerminate = VK_BUTTON1; break; 
+            case WM_BUTTON2MOTIONSTART: vkTerminate = VK_BUTTON2; break; 
+            case WM_BUTTON3MOTIONSTART: vkTerminate = VK_BUTTON3; break; 
+        }
+
+        if (WinGetKeyState(HWND_DESKTOP, vkTerminate) & 0x8000) {
+            // prefer the default button if it is pressed
+        } else if (WinGetKeyState(HWND_DESKTOP, VK_BUTTON2) & 0x8000) {
+            vkTerminate = VK_BUTTON2;
+        } else if (WinGetKeyState(HWND_DESKTOP, VK_BUTTON1) & 0x8000) {
+            vkTerminate = VK_BUTTON1;
+        } else if (WinGetKeyState(HWND_DESKTOP, VK_BUTTON3) & 0x8000) {
+            vkTerminate = VK_BUTTON3;
+        } else {
+            vkTerminate = 0;
+        }
+    }
+
+    if (!vkTerminate) {
+        DEBUG(() << "QDragManager::drag: No valid mouse button pressed, "
+                    "dragging cancelled!");
+        o->deleteLater();
+        return Qt::IgnoreAction;
+    }
+
+    USHORT supportedOps = toPmDragDropOps(dragPrivate()->possible_actions);
+
+    static QPMCoopDragWorker dragWorker;
+    
+    bool ok = dragWorker.collectWorkers(o);
+    Q_ASSERT(ok);
+    Q_ASSERT(dragWorker.hwnd());
+    if (!ok || !dragWorker.hwnd()) {
+        o->deleteLater();
+        return Qt::IgnoreAction;
+    }
+
+    dragWorker.src = o->mimeData();
+    dragWorker.init();
+    DRAGINFO *info = dragWorker.createDragInfo(o->objectName(), supportedOps);
+
+    Q_ASSERT(info);
+    if (!info) {
+        dragWorker.cleanup(true /* isCancelled */);
+        dragWorker.src = 0;
+        o->deleteLater();
+        return Qt::IgnoreAction;
+    }
+
+    object = o;
+
+    DEBUG(() << "QDragManager::drag: actions"
+             << dragActionsToString(dragPrivate()->possible_actions));
+
+    dragPrivate()->target = 0;
+
+#ifndef QT_NO_ACCESSIBILITY
+    QAccessible::updateAccessibility(this, 0, QAccessible::DragDropStart);
+#endif
+
+    // @todo custom drag pixmap?
+
+    DRAGIMAGE img;
+    img.cb = sizeof(DRAGIMAGE);
+    img.hImage = WinQuerySysPointer(HWND_DESKTOP, SPTR_FILE, FALSE);
+    img.fl = DRG_ICON;
+    img.cxOffset = 0;
+    img.cyOffset = 0;
+
+    // the mouse is most likely captured by Qt at this point, uncapture it
+    // or DrgDrag() will definitely fail
+    WinSetCapture(HWND_DESKTOP, 0);
+
+    HWND target = DrgDrag(dragWorker.hwnd(), info, &img, 1, vkTerminate,
+                          (PVOID)0x80000000L); // don't lock the desktop PS
+
+    DEBUG(("QDragManager::drag: DrgDrag() returned %08lX (error 0x%08lX)",
+            target, WinGetLastError(0)));
+
+    // we won't get any mouse release event, so manually adjust qApp state
+    qt_pmMouseButtonUp();
+
+    bool moveDisallowed = dragWorker.cleanup(beingCancelled || target == 0);
+    dragWorker.src = 0;
+    
+    moveDisallowed |= beingCancelled || target == 0 ||
+                      info->usOperation != DO_MOVE;
+
+    DEBUG(() << "QDragManager::drag: moveDisallowed" << moveDisallowed);
+
+    Qt::DropAction ret = Qt::IgnoreAction;
+    if (target != 0) {
+        ret = toQDragDropAction(info->usOperation);
+        if (moveDisallowed && info->usOperation == DO_MOVE)
+            ret = Qt::TargetMoveAction;
+    }
+
+    DEBUG(() << "QDragManager::drag: result" << dragActionsToString(ret));
+
+    if (target == 0)
+        DrgDeleteDraginfoStrHandles(info);
+    DrgFreeDraginfo(info);
+
+    if (!beingCancelled) {
+        dragPrivate()->target = QWidget::find(target);
+        cancel(); // this will delete o (object)
+    }
+
+    beingCancelled = false;
+
+#ifndef QT_NO_ACCESSIBILITY
+    QAccessible::updateAccessibility(this, 0, QAccessible::DragDropEnd);
+#endif
+
+    return ret;
+}
+
+void QDragManager::cancel(bool deleteSource)
+{
+    // Note: the only place where this function is called with
+    // deleteSource = false so far is QDrag::~QDrag()
+
+    Q_ASSERT(object && !beingCancelled);
+    if (!object || beingCancelled)
+        return;
+    
+    beingCancelled = true;
+
+    object->setMimeData(0);
+
+    if (deleteSource)
+        object->deleteLater();
+    object = 0;
+
+#ifndef QT_NO_CURSOR
+    // insert cancel code here ######## todo
+
+    if (restoreCursor) {
+        QApplication::restoreOverrideCursor();
+        restoreCursor = false;
+    }
+#endif
+#ifndef QT_NO_ACCESSIBILITY
+    QAccessible::updateAccessibility(this, 0, QAccessible::DragDropEnd);
+#endif
 }
 

trunk/src/gui/kernel/qmime.h

@@ -322 +322 @@
     friend class QClipboard;
     friend class QPMDragData;
+
 
     struct Match