X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/30954328be6e8261886c60cf509cbf303fd279bf..4b7b750dd1ffd0d26b78728adb613b282a37c058:/src/gtk/scrolwin.cpp

diff --git a/src/gtk/scrolwin.cpp b/src/gtk/scrolwin.cpp
index 2d64124e7c..7e38b4c7b2 100644
--- a/src/gtk/scrolwin.cpp
+++ b/src/gtk/scrolwin.cpp
@@ -42,6 +42,7 @@
 // ----------------------------------------------------------------------------
 
 BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel)
+    EVT_SCROLLWIN(wxScrolledWindow::OnScroll)
     EVT_SIZE(wxScrolledWindow::OnSize)
     EVT_PAINT(wxScrolledWindow::OnPaint)
     EVT_CHAR(wxScrolledWindow::OnChar)
@@ -103,8 +104,8 @@ static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust, wxScrol
 
 static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child )
 {
-    /* the window might have been scrolled already, do we
-       have to adapt the position */
+    // The window might have been scrolled already, do we
+    // have to adapt the position.
     GtkPizza *pizza = GTK_PIZZA(parent->m_wxwindow);
     child->m_x += pizza->xoffset;
     child->m_y += pizza->yoffset;
@@ -121,7 +122,7 @@ static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child )
 // wxScrolledWindow creation
 // ----------------------------------------------------------------------------
 
-wxScrolledWindow::wxScrolledWindow()
+void wxScrolledWindow::Init()
 {
     m_xScrollPixelsPerLine = 0;
     m_yScrollPixelsPerLine = 0;
@@ -134,6 +135,8 @@ wxScrolledWindow::wxScrolledWindow()
     m_xScrollLinesPerPage = 0;
     m_yScrollLinesPerPage = 0;
     m_targetWindow = (wxWindow*) NULL;
+    m_scaleX = 1.0;
+    m_scaleY = 1.0;
 }
 
 bool wxScrolledWindow::Create(wxWindow *parent,
@@ -143,6 +146,8 @@ bool wxScrolledWindow::Create(wxWindow *parent,
                               long style,
                               const wxString& name)
 {
+    Init();
+
     if (!PreCreation( parent, pos, size ) ||
         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
     {
@@ -152,17 +157,6 @@ bool wxScrolledWindow::Create(wxWindow *parent,
 
     m_insertCallback = wxInsertChildInScrolledWindow;
     
-    m_xScrollPixelsPerLine = 0;
-    m_yScrollPixelsPerLine = 0;
-    m_xScrollingEnabled = TRUE;
-    m_yScrollingEnabled = TRUE;
-    m_xScrollPosition = 0;
-    m_yScrollPosition = 0;
-    m_xScrollLines = 0;
-    m_yScrollLines = 0;
-    m_xScrollLinesPerPage = 0;
-    m_yScrollLinesPerPage = 0;
-
     m_targetWindow = this;
 
     m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
@@ -218,13 +212,9 @@ bool wxScrolledWindow::Create(wxWindow *parent,
     m_hAdjust->page_increment = 1.0;
     gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
 
-    // these handlers get notified when screen updates are required either when
-    // scrolling or when the window size (and therefore scrollbar configuration)
-    // has changed
-    gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
-          (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
-    gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
-          (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
+    // Handlers for new scrollbar values
+    GtkVConnectEvent();
+    GtkHConnectEvent();
 
     gtk_widget_show( m_wxwindow );
 
@@ -238,10 +228,6 @@ bool wxScrolledWindow::Create(wxWindow *parent,
     return TRUE;
 }
 
-wxScrolledWindow::~wxScrolledWindow()
-{
-}
-
 // ----------------------------------------------------------------------------
 // setting scrolling parameters
 // ----------------------------------------------------------------------------
@@ -265,13 +251,13 @@ void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY,
     m_hAdjust->upper = noUnitsX;
     m_hAdjust->value = xPos;
     m_hAdjust->step_increment = 1.0;
-    m_hAdjust->page_increment = 1.0;
+    m_hAdjust->page_increment = 2.0;
 
     m_vAdjust->lower = 0.0;
     m_vAdjust->upper = noUnitsY;
     m_vAdjust->value = yPos;
     m_vAdjust->step_increment = 1.0;
-    m_vAdjust->page_increment = 1.0;
+    m_vAdjust->page_increment = 2.0;
     
     AdjustScrollbars();
 }
@@ -291,6 +277,9 @@ void wxScrolledWindow::AdjustScrollbars()
     else
         m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
     
+    m_xScrollLinesPerPage = (int)(m_hAdjust->page_size + 0.5);
+    m_yScrollLinesPerPage = (int)(m_vAdjust->page_size + 0.5);
+    
     gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
     gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
 }
@@ -342,9 +331,49 @@ void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
         m_yScrollLinesPerPage = pageSize;
 }
 
-/*
- * Scroll to given position (scroll position, not pixel position)
- */
+void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
+{
+    int orient = event.GetOrientation();
+
+    int nScrollInc = CalcScrollInc(event);
+    if (nScrollInc == 0) return;
+
+    if (orient == wxHORIZONTAL)
+    {
+        int newPos = m_xScrollPosition + nScrollInc;
+        SetScrollPos(wxHORIZONTAL, newPos, TRUE );
+    }
+    else
+    {
+        int newPos = m_yScrollPosition + nScrollInc;
+        SetScrollPos(wxVERTICAL, newPos, TRUE );
+    }
+
+    if (orient == wxHORIZONTAL)
+    {
+        m_xScrollPosition += nScrollInc;
+    }
+    else
+    {
+        m_yScrollPosition += nScrollInc;
+    }
+
+    if (orient == wxHORIZONTAL)
+    {
+       if (m_xScrollingEnabled)
+            m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
+       else
+            m_targetWindow->Refresh();
+    }
+    else
+    {
+        if (m_yScrollingEnabled)
+            m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
+        else
+            m_targetWindow->Refresh();
+    }
+}
+
 void wxScrolledWindow::Scroll( int x_pos, int y_pos )
 {
     if (!m_targetWindow)
@@ -353,57 +382,97 @@ void wxScrolledWindow::Scroll( int x_pos, int y_pos )
     if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
         ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
 
-    int w, h;
-    m_targetWindow->GetClientSize(&w, &h);
-
     if ((x_pos != -1) && (m_xScrollPixelsPerLine))
     {
+        int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
+        if (max < 0) max = 0;
+        if (x_pos > max) x_pos = max;
+        if (x_pos < 0) x_pos = 0;
+            
         int old_x = m_xScrollPosition;
         m_xScrollPosition = x_pos;
-
-        // Calculate page size i.e. number of scroll units you get on the
-        // current client window
-        int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
-        if (noPagePositions < 1) noPagePositions = 1;
-
-        // Correct position if greater than extent of canvas minus
-        // the visible portion of it or if below zero
-        m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition );
-        m_xScrollPosition = wxMax( 0, m_xScrollPosition );
-
-        if (old_x != m_xScrollPosition) {
-            m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
-        }
+        m_hAdjust->value = x_pos;
+        
+        m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
+        
+        // Just update the scrollbar, don't send any wxWindows event
+        GtkHDisconnectEvent();
+        gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
+        GtkHConnectEvent();
     }
+    
     if ((y_pos != -1) && (m_yScrollPixelsPerLine))
     {
+        int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
+        if (max < 0) max = 0;
+        if (y_pos > max) y_pos = max;
+        if (y_pos < 0) y_pos = 0;
+            
         int old_y = m_yScrollPosition;
         m_yScrollPosition = y_pos;
-
-        // Calculate page size i.e. number of scroll units you get on the
-        // current client window
-        int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
-        if (noPagePositions < 1) noPagePositions = 1;
-
-        // Correct position if greater than extent of canvas minus
-        // the visible portion of it or if below zero
-        m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
-        m_yScrollPosition = wxMax( 0, m_yScrollPosition );
+        m_vAdjust->value = y_pos;
         
-        if (old_y != m_yScrollPosition) {
-            m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
-        }
+        m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
+        
+        // Just update the scrollbar, don't send any wxWindows event
+        GtkVDisconnectEvent();
+        gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
+        GtkVConnectEvent();
     }
 }
 
 void wxScrolledWindow::GtkVScroll( float value )
 {
-    Scroll( -1, (int)(value+0.5) );
+    if (!m_targetWindow)
+        return;
+
+    if (m_yScrollPixelsPerLine == 0)
+        return;
+    
+    int y_pos = (int)(value+0.5);
+    
+    if (y_pos == m_yScrollPosition)
+        return;
+    
+    GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
+    GtkRange *range = GTK_RANGE(scrolledWindow->vscrollbar);
+    
+    wxEventType command = wxEVT_SCROLLWIN_THUMBTRACK;
+    if      (range->scroll_type == GTK_SCROLL_STEP_BACKWARD) command = wxEVT_SCROLLWIN_LINEUP;
+    else if (range->scroll_type == GTK_SCROLL_STEP_FORWARD)  command = wxEVT_SCROLLWIN_LINEDOWN;
+    else if (range->scroll_type == GTK_SCROLL_PAGE_BACKWARD) command = wxEVT_SCROLLWIN_PAGEUP;
+    else if (range->scroll_type == GTK_SCROLL_PAGE_FORWARD)  command = wxEVT_SCROLLWIN_PAGEDOWN;
+
+    wxScrollWinEvent event( command, y_pos, wxVERTICAL );
+    event.SetEventObject( this );
+    GetEventHandler()->ProcessEvent( event );
 }
 
 void wxScrolledWindow::GtkHScroll( float value )
 {
-    Scroll( (int)(value+0.5), -1 );
+    if (!m_targetWindow)
+        return;
+        
+    if (m_xScrollPixelsPerLine == 0)
+        return;
+    
+    int x_pos = (int)(value+0.5);
+
+    if (x_pos == m_xScrollPosition)
+        return;
+
+    GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
+    GtkRange *range = GTK_RANGE(scrolledWindow->hscrollbar);
+    
+    wxEventType command = wxEVT_SCROLLWIN_THUMBTRACK;
+    if      (range->scroll_type == GTK_SCROLL_STEP_BACKWARD) command = wxEVT_SCROLLWIN_LINEUP;
+    else if (range->scroll_type == GTK_SCROLL_STEP_FORWARD)  command = wxEVT_SCROLLWIN_LINEDOWN;
+    else if (range->scroll_type == GTK_SCROLL_PAGE_BACKWARD) command = wxEVT_SCROLLWIN_PAGEUP;
+    else if (range->scroll_type == GTK_SCROLL_PAGE_FORWARD)  command = wxEVT_SCROLLWIN_PAGEDOWN;
+
+    wxScrollWinEvent event( command, x_pos, wxHORIZONTAL );
+    event.SetEventObject( this );
+    GetEventHandler()->ProcessEvent( event );
 }
 
 void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
@@ -445,6 +514,163 @@ void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) co
         *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
 }
 
+int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
+{
+    int pos = event.GetPosition();
+    int orient = event.GetOrientation();
+
+    int nScrollInc = 0;
+    if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = - m_xScrollPosition;
+            else
+                nScrollInc = - m_yScrollPosition;
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = m_xScrollLines - m_xScrollPosition;
+            else
+                nScrollInc = m_yScrollLines - m_yScrollPosition;
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
+    {
+            nScrollInc = -1;
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
+    {
+            nScrollInc = 1;
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
+            else
+                nScrollInc = -GetScrollPageSize(wxVERTICAL);
+    } else
+    if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = GetScrollPageSize(wxHORIZONTAL);
+            else
+                nScrollInc = GetScrollPageSize(wxVERTICAL);
+    } else
+    if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
+        (event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
+    {
+            if (orient == wxHORIZONTAL)
+                nScrollInc = pos - m_xScrollPosition;
+            else
+                nScrollInc = pos - m_yScrollPosition;
+    }
+
+    if (orient == wxHORIZONTAL)
+    {
+        if (m_xScrollPixelsPerLine > 0)
+        {
+            int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
+            if (max < 0) max = 0;
+
+            if ( (m_xScrollPosition + nScrollInc) < 0 )
+                nScrollInc = -m_xScrollPosition; // As -ve as we can go
+            else if ( (m_xScrollPosition + nScrollInc) > max )
+                nScrollInc = max - m_xScrollPosition; // As +ve as we can go
+        }
+        else
+            m_targetWindow->Refresh();
+    }
+    else
+    {
+        if (m_yScrollPixelsPerLine > 0)
+        {
+            int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
+            if (max < 0) max = 0;
+
+            if ( (m_yScrollPosition + nScrollInc) < 0 )
+                nScrollInc = -m_yScrollPosition; // As -ve as we can go
+            else if ( (m_yScrollPosition + nScrollInc) > max )
+                nScrollInc = max - m_yScrollPosition; // As +ve as we can go
+        }
+        else
+            m_targetWindow->Refresh();
+    }
+
+    return nScrollInc;
+}
+
+void wxScrolledWindow::SetScrollPos( int orient, int pos, bool WXUNUSED(refresh) )
+{
+    wxCHECK_RET( m_widget != NULL, wxT("invalid window") );
+
+    wxCHECK_RET( m_wxwindow != NULL, wxT("window needs client area for scrolling") );
+
+    if (orient == wxHORIZONTAL)
+    {
+        int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
+        if (max < 0) max = 0;
+        
+        if (pos > max) pos = 0;
+        if (pos < 0) pos = 0;
+        
+        if (pos == (int)(m_hAdjust->value+0.5)) return;
+        m_hAdjust->value = pos;
+    }
+    else
+    {
+        int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
+        if (max < 0) max = 0;
+        
+        if (pos > max) pos = 0;
+        if (pos < 0) pos = 0;
+        
+        if (pos == (int)(m_vAdjust->value+0.5)) return;
+        m_vAdjust->value = pos;
+    }
+
+    if (m_wxwindow->window)
+    {
+        if (orient == wxHORIZONTAL)
+        {
+            // Just update the scrollbar, don't send any wxWindows event
+            GtkHDisconnectEvent();
+            gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
+            GtkHConnectEvent();
+        }
+        else
+        {
+            // Just update the scrollbar, don't send any wxWindows event
+            GtkVDisconnectEvent();
+            gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
+            GtkVConnectEvent();
+        }
+    }
+}
+
+void wxScrolledWindow::GtkVConnectEvent()
+{
+    gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
+          (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
+}
+
+void wxScrolledWindow::GtkHConnectEvent()
+{
+    gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
+          (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
+}
+
+void wxScrolledWindow::GtkHDisconnectEvent()
+{
+    gtk_signal_disconnect_by_func( GTK_OBJECT(m_hAdjust),
+        (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
+}
+
+void wxScrolledWindow::GtkVDisconnectEvent()
+{
+    gtk_signal_disconnect_by_func( GTK_OBJECT(m_vAdjust),
+        (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
+}
+
 // ----------------------------------------------------------------------------
 // event handlers
 // ----------------------------------------------------------------------------