X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/865bb3251ecf83ddac350b734f4fed1d258e250b..4e15d1caa03346c126015019c1fdf093033ef40b:/src/gtk/scrolwin.cpp diff --git a/src/gtk/scrolwin.cpp b/src/gtk/scrolwin.cpp index 79cfe5d3a3..2ce5843e92 100644 --- a/src/gtk/scrolwin.cpp +++ b/src/gtk/scrolwin.cpp @@ -1,26 +1,15 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: gtk/scrolwin.cpp +// Name: src/gtk/scrolwin.cpp // Purpose: wxScrolledWindow implementation // Author: Robert Roebling // Modified by: Ron Lee +// Vadim Zeitlin: removed 90% of duplicated common code // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) Robert Roebling // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -// ============================================================================ -// declarations -// ============================================================================ - -// ---------------------------------------------------------------------------- -// headers -// ---------------------------------------------------------------------------- - -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) - #pragma implementation "scrolwin.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -29,1017 +18,177 @@ #endif #include "wx/scrolwin.h" -#include "wx/utils.h" -#include "wx/dcclient.h" -#include "wx/panel.h" -#include "wx/sizer.h" -#include "wx/gtk/private.h" -#include "wx/gtk/win_gtk.h" +#include +#include "wx/gtk/private/gtk2-compat.h" // ---------------------------------------------------------------------------- -// event tables +// wxScrollHelper implementation // ---------------------------------------------------------------------------- -BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel) - EVT_SCROLLWIN(wxScrolledWindow::OnScroll) - EVT_SIZE(wxScrolledWindow::OnSize) - EVT_PAINT(wxScrolledWindow::OnPaint) - EVT_CHAR(wxScrolledWindow::OnChar) -END_EVENT_TABLE() - -IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel) - -// ============================================================================ -// implementation -// ============================================================================ - -//----------------------------------------------------------------------------- -// data -//----------------------------------------------------------------------------- - -extern bool g_blockEventsOnDrag; -extern bool g_blockEventsOnScroll; - -//----------------------------------------------------------------------------- -// idle system -//----------------------------------------------------------------------------- - -extern void wxapp_install_idle_handler(); -extern bool g_isIdle; - -//----------------------------------------------------------------------------- -// "value_changed" from m_vAdjust -//----------------------------------------------------------------------------- - -extern "C" { -static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust, - SCROLLBAR_CBACK_ARG - wxScrolledWindow *win ) -{ - if (g_isIdle) - wxapp_install_idle_handler(); - - if (g_blockEventsOnDrag) return; - - if (!win->m_hasVMT) return; - - win->GtkVScroll( adjust->value, - GET_SCROLL_TYPE(GTK_SCROLLED_WINDOW(win->m_widget)->vscrollbar) ); -} -} - -//----------------------------------------------------------------------------- -// "value_changed" from m_hAdjust -//----------------------------------------------------------------------------- - -extern "C" { -static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust, - SCROLLBAR_CBACK_ARG - wxScrolledWindow *win ) +void wxScrollHelper::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY, + int noUnitsX, int noUnitsY, + int xPos, int yPos, + bool noRefresh) { - if (g_isIdle) - wxapp_install_idle_handler(); - - if (g_blockEventsOnDrag) return; - if (!win->m_hasVMT) return; - - win->GtkHScroll( adjust->value, - GET_SCROLL_TYPE(GTK_SCROLLED_WINDOW(win->m_widget)->hscrollbar) ); -} -} - -//----------------------------------------------------------------------------- -// "button_press_event" from scrollbar -//----------------------------------------------------------------------------- - -extern "C" { -static gint gtk_scrollbar_button_press_callback( GtkRange *widget, - GdkEventButton *gdk_event, - wxWindowGTK *win) -{ - if (g_isIdle) - wxapp_install_idle_handler(); - - g_blockEventsOnScroll = TRUE; - - // FIXME: there is no slider field any more, what was meant here? -#ifndef __WXGTK20__ - win->m_isScrolling = (gdk_event->window == widget->slider); -#endif - - return FALSE; -} -} - -//----------------------------------------------------------------------------- -// "button_release_event" from scrollbar -//----------------------------------------------------------------------------- - -extern "C" { -static gint gtk_scrollbar_button_release_callback( GtkRange *widget, - GdkEventButton *WXUNUSED(gdk_event), - wxWindowGTK *win) -{ -// don't test here as we can release the mouse while being over -// a different window than the slider -// -// if (gdk_event->window != widget->slider) return FALSE; - - g_blockEventsOnScroll = FALSE; - - if (win->m_isScrolling) - { - wxEventType command = wxEVT_SCROLLWIN_THUMBRELEASE; - int value = -1; - int dir = -1; - - GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(win->m_widget); - if (widget == GTK_RANGE(scrolledWindow->hscrollbar)) - { - value = (int)(win->m_hAdjust->value+0.5); - dir = wxHORIZONTAL; - } - if (widget == GTK_RANGE(scrolledWindow->vscrollbar)) - { - value = (int)(win->m_vAdjust->value+0.5); - dir = wxVERTICAL; - } - - wxScrollWinEvent event( command, value, dir ); - event.SetEventObject( win ); - win->GetEventHandler()->ProcessEvent( event ); - } - - win->m_isScrolling = FALSE; - - return FALSE; -} -} - -//----------------------------------------------------------------------------- -// InsertChild for wxScrolledWindow -//----------------------------------------------------------------------------- - -static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child ) -{ - // 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; - - gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow), - GTK_WIDGET(child->m_widget), - child->m_x, - child->m_y, - child->m_width, - child->m_height ); -} - -// ---------------------------------------------------------------------------- -// wxScrolledWindow creation -// ---------------------------------------------------------------------------- - -void wxScrolledWindow::Init() -{ - m_xScrollPixelsPerLine = 0; - m_yScrollPixelsPerLine = 0; - m_xScrollingEnabled = TRUE; - m_yScrollingEnabled = TRUE; - m_xScrollPosition = 0; - m_yScrollPosition = 0; - m_xScrollLinesPerPage = 0; - m_yScrollLinesPerPage = 0; - m_targetWindow = (wxWindow*) NULL; - m_scaleX = 1.0; - m_scaleY = 1.0; - m_hasScrolling = TRUE; -} - -bool wxScrolledWindow::Create(wxWindow *parent, - wxWindowID id, - const wxPoint& pos, - const wxSize& size, - long style, - const wxString& name) -{ - Init(); - - if (!PreCreation( parent, pos, size ) || - !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name )) - { - wxFAIL_MSG( wxT("wxWindow creation failed") ); - return FALSE; - } - - m_insertCallback = wxInsertChildInScrolledWindow; - - m_targetWindow = this; - - m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL ); - GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS ); - - GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget); - - GtkScrolledWindowClass *scroll_class = GTK_SCROLLED_WINDOW_CLASS( GTK_OBJECT_GET_CLASS(m_widget) ); - scroll_class->scrollbar_spacing = 0; - - gtk_scrolled_window_set_policy( scrolledWindow, GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC ); - - m_hAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->hscrollbar) ); - m_vAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->vscrollbar) ); - - m_wxwindow = gtk_pizza_new(); - - gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow ); - - GtkPizza *pizza = GTK_PIZZA(m_wxwindow); - - if (HasFlag(wxRAISED_BORDER)) - { - gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_OUT ); - } - else if (HasFlag(wxSUNKEN_BORDER)) - { - gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_IN ); - } - else if (HasFlag(wxSIMPLE_BORDER)) - { - gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_THIN ); - } - else - { - gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_NONE ); - } - - GTK_WIDGET_SET_FLAGS( m_wxwindow, GTK_CAN_FOCUS ); - m_acceptsFocus = TRUE; - - // I _really_ don't want scrollbars in the beginning - m_vAdjust->lower = 0.0; - m_vAdjust->upper = 1.0; - m_vAdjust->value = 0.0; - m_vAdjust->step_increment = 1.0; - m_vAdjust->page_increment = 2.0; - gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" ); - m_hAdjust->lower = 0.0; - m_hAdjust->upper = 1.0; - m_hAdjust->value = 0.0; - m_hAdjust->step_increment = 1.0; - m_hAdjust->page_increment = 2.0; - gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" ); - - // Handlers for new scrollbar values - GtkVConnectEvent(); - GtkHConnectEvent(); - - // these handlers block mouse events to any window during scrolling such as - // motion events and prevent GTK and wxWidgets from fighting over where the - // slider should be - - gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_press_event", - (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this ); - - gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_press_event", - (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this ); - - gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_release_event", - (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this ); - - gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_release_event", - (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this ); - - gtk_widget_show( m_wxwindow ); + // prevent programmatic position changes from causing scroll events + m_win->SetScrollPos(wxHORIZONTAL, xPos); + m_win->SetScrollPos(wxVERTICAL, yPos); - if (m_parent) - m_parent->DoAddChild( this ); - - m_focusWidget = m_wxwindow; - - PostCreation(); - - Show( TRUE ); - - return TRUE; + base_type::SetScrollbars( + pixelsPerUnitX, pixelsPerUnitY, noUnitsX, noUnitsY, xPos, yPos, noRefresh); } -// ---------------------------------------------------------------------------- -// setting scrolling parameters -// ---------------------------------------------------------------------------- - -void wxScrolledWindow::DoSetVirtualSize( int x, int y ) +void wxScrollHelper::DoAdjustScrollbar(GtkRange* range, + int pixelsPerLine, + int winSize, + int virtSize, + int *pos, + int *lines, + int *linesPerPage) { - wxPanel::DoSetVirtualSize( x, y ); - AdjustScrollbars(); - - if (GetAutoLayout()) - Layout(); -} + if (!range) + return; -// wxWindow's GetBestVirtualSize returns the actual window size, -// whereas we want to return the virtual size -wxSize wxScrolledWindow::GetBestVirtualSize() const -{ - wxSize clientSize( GetClientSize() ); - if (GetSizer()) + int upper; + int page_size; + if (pixelsPerLine > 0 && winSize > 0 && winSize < virtSize) { - wxSize minSize( GetSizer()->CalcMin() ); - - return wxSize( wxMax( clientSize.x, minSize.x ), wxMax( clientSize.y, minSize.y ) ); + upper = (virtSize + pixelsPerLine - 1) / pixelsPerLine; + page_size = winSize / pixelsPerLine; + *lines = upper; + *linesPerPage = page_size; } else - return clientSize; -} - -// return the size best suited for the current window -// (this isn't a virtual size, this is a sensible size for the window) -wxSize wxScrolledWindow::DoGetBestSize() const -{ - wxSize best; - - if ( GetSizer() ) { - wxSize b = GetSizer()->GetMinSize(); - - // Only use the content to set the window size in the direction - // where there's no scrolling; otherwise we're going to get a huge - // window in the direction in which scrolling is enabled - int ppuX, ppuY; - GetScrollPixelsPerUnit(& ppuX, & ppuY); - - wxSize minSize; - if ( GetMinSize().IsFullySpecified() ) - minSize = GetMinSize(); - else - minSize = GetSize(); - - if (ppuX > 0) - b.x = minSize.x; - if (ppuY > 0) - b.y = minSize.y; - best = b; + // GtkRange won't allow upper == lower, so for disabled state use [0,1] + // with a page size of 1. This will also clamp position to 0. + upper = 1; + page_size = 1; + *lines = 0; + *linesPerPage = 0; } - else - return wxWindow::DoGetBestSize(); - - // Add any difference between size and client size - wxSize diff = GetSize() - GetClientSize(); - best.x += wxMax(0, diff.x); - best.y += wxMax(0, diff.y); - return best; -} - -/* - * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line) - * noUnitsX/noUnitsY: : no. units per scrollbar - */ -void wxScrolledWindow::SetScrollbars( int pixelsPerUnitX, int pixelsPerUnitY, - int noUnitsX, int noUnitsY, - int xPos, int yPos, bool noRefresh ) -{ - int xs, ys; - GetViewStart (& xs, & ys); - - int old_x = m_xScrollPixelsPerLine * xs; - int old_y = m_yScrollPixelsPerLine * ys; - - m_xScrollPixelsPerLine = pixelsPerUnitX; - m_yScrollPixelsPerLine = pixelsPerUnitY; - - m_hAdjust->value = m_xScrollPosition = xPos; - m_vAdjust->value = m_yScrollPosition = yPos; + gtk_range_set_increments(range, 1, page_size); + gtk_adjustment_set_page_size(gtk_range_get_adjustment(range), page_size); + gtk_range_set_range(range, 0, upper); - // Setting hints here should arguably be deprecated, but without it - // a sizer might override this manual scrollbar setting in old code. - // m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY ); - - int w = noUnitsX * pixelsPerUnitX; - int h = noUnitsY * pixelsPerUnitY; - m_targetWindow->SetVirtualSize( w ? w : wxDefaultCoord, - h ? h : wxDefaultCoord); - - if (!noRefresh) - { - int new_x = m_xScrollPixelsPerLine * m_xScrollPosition; - int new_y = m_yScrollPixelsPerLine * m_yScrollPosition; - - m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y ); - } + // ensure that the scroll position is always in valid range + if (*pos > *lines) + *pos = *lines; } -void wxScrolledWindow::AdjustScrollbars() +void wxScrollHelper::AdjustScrollbars() { - int w, h; int vw, vh; + m_targetWindow->GetVirtualSize(&vw, &vh); - m_targetWindow->GetClientSize( &w, &h ); - m_targetWindow->GetVirtualSize( &vw, &vh ); - - if (m_xScrollPixelsPerLine == 0) - { - m_hAdjust->upper = 1.0; - m_hAdjust->page_increment = 1.0; - m_hAdjust->page_size = 1.0; - } - else - { - m_hAdjust->upper = (vw+m_xScrollPixelsPerLine-1) / m_xScrollPixelsPerLine; - m_hAdjust->page_size = w / m_xScrollPixelsPerLine; - m_hAdjust->page_increment = w / m_xScrollPixelsPerLine; - - // Special case. When client and virtual size are very close but - // the client is big enough, kill scrollbar. - - if ((m_hAdjust->page_size < m_hAdjust->upper) && (w >= vw)) - m_hAdjust->page_size += 1.0; - - // If the scrollbar hits the right side, move the window - // right to keep it from over extending. - - if ((m_hAdjust->value != 0.0) && (m_hAdjust->value + m_hAdjust->page_size > m_hAdjust->upper)) - { - m_hAdjust->value = m_hAdjust->upper - m_hAdjust->page_size; - if (m_hAdjust->value < 0.0) - m_hAdjust->value = 0.0; - - if (GetChildren().GetCount() == 0) - m_xScrollPosition = (int)m_hAdjust->value; // This is enough without child windows - else - gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" ); // Actually scroll window - } - } - - if (m_yScrollPixelsPerLine == 0) - { - m_vAdjust->upper = 1.0; - m_vAdjust->page_increment = 1.0; - m_vAdjust->page_size = 1.0; - } - else - { - m_vAdjust->upper = (vh+m_yScrollPixelsPerLine-1) / m_yScrollPixelsPerLine; - m_vAdjust->page_size = h / m_yScrollPixelsPerLine; - m_vAdjust->page_increment = h / m_yScrollPixelsPerLine; - - if ((m_vAdjust->page_size < m_vAdjust->upper) && (h >= vh)) - m_vAdjust->page_size += 1.0; - - if ((m_vAdjust->value != 0.0) && (m_vAdjust->value + m_vAdjust->page_size > m_vAdjust->upper)) - { - m_vAdjust->value = m_vAdjust->upper - m_vAdjust->page_size; - if (m_vAdjust->value < 0.0) - m_vAdjust->value = 0.0; - - if (GetChildren().GetCount() == 0) - m_yScrollPosition = (int)m_vAdjust->value; - else - gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" ); - } - } - - m_xScrollLinesPerPage = (int)(m_hAdjust->page_increment + 0.5); - m_yScrollLinesPerPage = (int)(m_vAdjust->page_increment + 0.5); - - gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" ); - gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" ); -} - - -// ---------------------------------------------------------------------------- -// target window handling -// ---------------------------------------------------------------------------- - -void wxScrolledWindow::SetTargetWindow( wxWindow *target, bool WXUNUSED(pushEventHandler) ) -{ - wxASSERT_MSG( target, wxT("target window must not be NULL") ); - m_targetWindow = target; -} - -wxWindow *wxScrolledWindow::GetTargetWindow() const -{ - return m_targetWindow; -} - -// Override this function if you don't want to have wxScrolledWindow -// automatically change the origin according to the scroll position. -void wxScrolledWindow::DoPrepareDC(wxDC& dc) -{ - dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine, - -m_yScrollPosition * m_yScrollPixelsPerLine ); -} - -void wxScrolledWindow::SetScrollRate( int xstep, int ystep ) -{ - int old_x = m_xScrollPixelsPerLine * m_xScrollPosition; - int old_y = m_yScrollPixelsPerLine * m_yScrollPosition; - - m_xScrollPixelsPerLine = xstep; - m_yScrollPixelsPerLine = ystep; - - int new_x = m_xScrollPixelsPerLine * m_xScrollPosition; - int new_y = m_yScrollPixelsPerLine * m_yScrollPosition; - - m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y ); - - AdjustScrollbars(); -} - -void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const -{ - if ( x_unit ) - *x_unit = m_xScrollPixelsPerLine; - if ( y_unit ) - *y_unit = m_yScrollPixelsPerLine; -} - -int wxScrolledWindow::GetScrollPageSize(int orient) const -{ - if ( orient == wxHORIZONTAL ) - return m_xScrollLinesPerPage; - else - return m_yScrollLinesPerPage; -} - -void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize) -{ - if ( orient == wxHORIZONTAL ) - m_xScrollLinesPerPage = pageSize; - else - m_yScrollLinesPerPage = pageSize; -} - -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 ) -{ - wxASSERT_MSG( m_targetWindow != 0, _T("No target window") ); - - if (((x_pos == -1) || (x_pos == m_xScrollPosition)) && - ((y_pos == -1) || (y_pos == m_yScrollPosition))) return; - - 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; - m_hAdjust->value = x_pos; - - m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 ); - - // Just update the scrollbar, don't send any wxWidgets event - GtkHDisconnectEvent(); - gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" ); - GtkHConnectEvent(); - } - - if ((y_pos != -1) && (m_yScrollPixelsPerLine)) + int w, h; + const wxSize availSize = GetSizeAvailableForScrollTarget( + m_win->GetSize() - m_win->GetWindowBorderSize()); + if ( availSize.x >= vw && availSize.y >= vh ) { - 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; - m_vAdjust->value = y_pos; - - m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine ); - - // Just update the scrollbar, don't send any wxWidgets event - GtkVDisconnectEvent(); - gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" ); - GtkVConnectEvent(); - } -} - -// TODO: [VH]Scroll functions should be combined - -void wxScrolledWindow::GtkVScroll( float value, unsigned int scroll_type ) -{ - wxASSERT_MSG( m_targetWindow != 0, _T("No target window") ); - - if (m_yScrollPixelsPerLine == 0) - return; - - int y_pos = (int)(value+0.5); - - if (y_pos == m_yScrollPosition) - return; - - wxEventType command = GtkScrollWinTypeToWx(scroll_type); - - wxScrollWinEvent event( command, y_pos, wxVERTICAL ); - event.SetEventObject( this ); - GetEventHandler()->ProcessEvent( event ); -} - -void wxScrolledWindow::GtkHScroll( float value, unsigned int scroll_type ) -{ - wxASSERT_MSG( m_targetWindow != 0, _T("No target window") ); - - if (m_xScrollPixelsPerLine == 0) - return; + w = availSize.x; + h = availSize.y; - int x_pos = (int)(value+0.5); + // we know that the scrollbars will be removed + DoAdjustHScrollbar(w, vw); + DoAdjustVScrollbar(h, vh); - if (x_pos == m_xScrollPosition) return; - - wxEventType command = GtkScrollWinTypeToWx(scroll_type); - - wxScrollWinEvent event( command, x_pos, wxHORIZONTAL ); - event.SetEventObject( this ); - GetEventHandler()->ProcessEvent( event ); -} - -void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll) -{ - m_xScrollingEnabled = x_scroll; - m_yScrollingEnabled = y_scroll; -} - -// Where the current view starts from -void wxScrolledWindow::GetViewStart (int *x, int *y) const -{ - if ( x ) - *x = m_xScrollPosition; - if ( y ) - *y = m_yScrollPosition; -} - -void wxScrolledWindow::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const -{ - int xs, ys; - GetViewStart (& xs, & ys); - - if ( xx ) - *xx = x - xs * m_xScrollPixelsPerLine; - if ( yy ) - *yy = y - ys * m_yScrollPixelsPerLine; -} - -void wxScrolledWindow::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const -{ - int xs, ys; - GetViewStart (& xs, & ys); - - if ( xx ) - *xx = x + xs * m_xScrollPixelsPerLine; - if ( yy ) - *yy = y + ys * 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 = GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine - m_xScrollPosition; - else - nScrollInc = GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine - 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; + m_targetWindow->GetClientSize(&w, NULL); + DoAdjustHScrollbar(w, vw); - 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 + m_targetWindow->GetClientSize(NULL, &h); + DoAdjustVScrollbar(h, vh); + + const int w_old = w; + m_targetWindow->GetClientSize(&w, NULL); + if ( w != w_old ) { - if (m_yScrollPixelsPerLine > 0) - { - int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5); - if (max < 0) max = 0; + // It is necessary to repeat the calculations in this case to avoid an + // observed infinite series of size events, involving alternating + // changes in visibility of the scrollbars. + // At this point, GTK+ has already queued a resize, which will cause + // AdjustScrollbars() to be called again. If the scrollbar visibility + // is not correct before then, yet another resize will occur, possibly + // leading to an unending series if the sizes are just right. + DoAdjustHScrollbar(w, vw); - 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(); + m_targetWindow->GetClientSize(NULL, &h); + DoAdjustVScrollbar(h, vh); } - - return nScrollInc; } -void wxScrolledWindow::SetScrollPos( int orient, int pos, bool refresh ) +void wxScrollHelper::DoScrollOneDir(int orient, + int pos, + int pixelsPerLine, + int *posOld) { - 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 + if ( pos != -1 && pos != *posOld && pixelsPerLine ) { - int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5); - if (max < 0) max = 0; + m_win->SetScrollPos(orient, pos); + pos = m_win->GetScrollPos(orient); - if (pos > max) pos = 0; - if (pos < 0) pos = 0; - - if (pos == (int)(m_vAdjust->value+0.5)) return; - m_vAdjust->value = pos; - } + int diff = (*posOld - pos)*pixelsPerLine; + m_targetWindow->ScrollWindow(orient == wxHORIZONTAL ? diff : 0, + orient == wxHORIZONTAL ? 0 : diff); - if (m_wxwindow->window) - { - if (orient == wxHORIZONTAL) - { - // Just update the scrollbar, don't send any wxWidgets event - GtkHDisconnectEvent(); - gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" ); - GtkHConnectEvent(); - } - else - { - // Just update the scrollbar, don't send any wxWidgets event - GtkVDisconnectEvent(); - gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" ); - GtkVConnectEvent(); - } + *posOld = pos; } } -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() +void wxScrollHelper::DoScroll( int x_pos, int y_pos ) { - gtk_signal_disconnect_by_func( GTK_OBJECT(m_vAdjust), - (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this ); -} + wxCHECK_RET( m_targetWindow != 0, wxT("No target window") ); -bool wxScrolledWindow::Layout() -{ - if (GetSizer() && m_targetWindow == this) - { - // If we're the scroll target, take into account the - // virtual size and scrolled position of the window. - - int x, y, w, h; - CalcScrolledPosition(0,0, &x,&y); - GetVirtualSize(&w, &h); - GetSizer()->SetDimension(x, y, w, h); - return TRUE; - } - else - return wxPanel::Layout(); // fall back to default for LayoutConstraints + DoScrollOneDir(wxHORIZONTAL, x_pos, m_xScrollPixelsPerLine, &m_xScrollPosition); + DoScrollOneDir(wxVERTICAL, y_pos, m_yScrollPixelsPerLine, &m_yScrollPosition); } // ---------------------------------------------------------------------------- -// event handlers +// scrollbars visibility // ---------------------------------------------------------------------------- -// Default OnSize resets scrollbars, if any -void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event)) -{ - if ( m_targetWindow->GetAutoLayout() ) - { - wxSize size = m_targetWindow->GetBestVirtualSize(); - - // This will call ::Layout() and ::AdjustScrollbars() - SetVirtualSize( size ); - } - else - { - AdjustScrollbars(); - } -} - -// This calls OnDraw, having adjusted the origin according to the current -// scroll position -void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event)) +namespace { - wxPaintDC dc(this); - PrepareDC(dc); - - OnDraw(dc); -} -// kbd handling: notice that we use OnChar() and not OnKeyDown() for -// compatibility here - if we used OnKeyDown(), the programs which process -// arrows themselves in their OnChar() would never get the message and like -// this they always have the priority -void wxScrolledWindow::OnChar(wxKeyEvent& event) +GtkPolicyType GtkPolicyFromWX(wxScrollbarVisibility visibility) { - int stx, sty, // view origin - szx, szy, // view size (total) - clix, cliy; // view size (on screen) - - GetViewStart(&stx, &sty); - GetClientSize(&clix, &cliy); - GetVirtualSize(&szx, &szy); - - if( m_xScrollPixelsPerLine ) - { - clix /= m_xScrollPixelsPerLine; - szx /= m_xScrollPixelsPerLine; - } - else - { - clix = 0; - szx = -1; - } - if( m_yScrollPixelsPerLine ) - { - cliy /= m_yScrollPixelsPerLine; - szy /= m_yScrollPixelsPerLine; - } - else - { - cliy = 0; - szy = -1; - } - - int xScrollOld = GetScrollPos(wxHORIZONTAL), - yScrollOld = GetScrollPos(wxVERTICAL); - - int dsty; - switch ( event.GetKeyCode() ) + GtkPolicyType policy; + switch ( visibility ) { - case WXK_PAGEUP: - case WXK_PRIOR: - dsty = sty - (5 * cliy / 6); - Scroll(-1, (dsty == -1) ? 0 : dsty); + case wxSHOW_SB_NEVER: + policy = GTK_POLICY_NEVER; break; - case WXK_PAGEDOWN: - case WXK_NEXT: - Scroll(-1, sty + (5 * cliy / 6)); - break; - - case WXK_HOME: - Scroll(0, event.ControlDown() ? 0 : -1); - break; - - case WXK_END: - Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1); - break; - - case WXK_UP: - Scroll(-1, sty - 1); - break; - - case WXK_DOWN: - Scroll(-1, sty + 1); - break; - - case WXK_LEFT: - Scroll(stx - 1, -1); - break; - - case WXK_RIGHT: - Scroll(stx + 1, -1); + case wxSHOW_SB_DEFAULT: + policy = GTK_POLICY_AUTOMATIC; break; default: - // not for us - event.Skip(); - return; - } + wxFAIL_MSG( wxS("unknown scrollbar visibility") ); + // fall through - int xScroll = GetScrollPos(wxHORIZONTAL); - if ( xScroll != xScrollOld ) - { - wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, xScroll, - wxHORIZONTAL); - event.SetEventObject(this); - GetEventHandler()->ProcessEvent(event); + case wxSHOW_SB_ALWAYS: + policy = GTK_POLICY_ALWAYS; + break; } - int yScroll = GetScrollPos(wxVERTICAL); - if ( yScroll != yScrollOld ) - { - wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, yScroll, - wxVERTICAL); - event.SetEventObject(this); - GetEventHandler()->ProcessEvent(event); - } + return policy; } +} // anonymous namespace -// vi:sts=4:sw=4:et +void wxScrollHelper::DoShowScrollbars(wxScrollbarVisibility horz, + wxScrollbarVisibility vert) +{ + GtkScrolledWindow * const scrolled = GTK_SCROLLED_WINDOW(m_win->m_widget); + wxCHECK_RET( scrolled, "window must be created" ); + + gtk_scrolled_window_set_policy(scrolled, + GtkPolicyFromWX(horz), + GtkPolicyFromWX(vert)); +}