/////////////////////////////////////////////////////////////////////////////
-// Name: gtk/scrolwin.cpp
+// Name: src/gtk/scrolwin.cpp
// Purpose: wxScrolledWindow implementation
// Author: Robert Roebling
// Modified by: Ron Lee
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-// ============================================================================
-// declarations
-// ============================================================================
-
-// ----------------------------------------------------------------------------
-// headers
-// ----------------------------------------------------------------------------
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#endif
#include "wx/scrolwin.h"
-#include "wx/gtk/private.h"
-// ============================================================================
-// implementation
-// ============================================================================
+#include <gtk/gtk.h>
+#include "wx/gtk/private/gtk2-compat.h"
// ----------------------------------------------------------------------------
// wxScrollHelper implementation
// ----------------------------------------------------------------------------
-void wxScrollHelperNative::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
- int noUnitsX, int noUnitsY,
- int xPos, int yPos,
- bool noRefresh)
+void wxScrollHelper::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;
+ // prevent programmatic position changes from causing scroll events
+ m_win->SetScrollPos(wxHORIZONTAL, xPos);
+ m_win->SetScrollPos(wxVERTICAL, yPos);
- m_win->m_hAdjust->value = m_xScrollPosition = xPos;
- m_win->m_vAdjust->value = m_yScrollPosition = yPos;
-
- // 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 );
- }
-
- m_targetWindow->m_hasScrolling = pixelsPerUnitX || pixelsPerUnitY;
+ base_type::SetScrollbars(
+ pixelsPerUnitX, pixelsPerUnitY, noUnitsX, noUnitsY, xPos, yPos, noRefresh);
}
-void wxScrollHelperNative::DoAdjustScrollbar(GtkAdjustment *adj,
- int pixelsPerLine,
- int winSize,
- int virtSize,
- int *pos,
- int *lines,
- int *linesPerPage)
+void wxScrollHelper::DoAdjustScrollbar(GtkRange* range,
+ int pixelsPerLine,
+ int winSize,
+ int virtSize,
+ int *pos,
+ int *lines,
+ int *linesPerPage)
{
- if ( pixelsPerLine == 0 )
+ if (!range)
+ return;
+
+ int upper;
+ int page_size;
+ if (pixelsPerLine > 0 && winSize > 0 && winSize < virtSize)
{
- adj->upper = 1.0;
- adj->page_increment = 1.0;
- adj->page_size = 1.0;
+ upper = (virtSize + pixelsPerLine - 1) / pixelsPerLine;
+ page_size = winSize / pixelsPerLine;
+ *lines = upper;
+ *linesPerPage = page_size;
}
- else // we do have scrollbar
+ else
{
- adj->upper = (virtSize + pixelsPerLine - 1) / pixelsPerLine;
- adj->page_size = winSize / pixelsPerLine;
- adj->page_increment = winSize / pixelsPerLine;
-
- // Special case. When client and virtual size are very close but
- // the client is big enough, kill scrollbar.
-
- if ((adj->page_size < adj->upper) && (winSize >= virtSize))
- adj->page_size += 1.0;
-
- // If the scrollbar hits the right side, move the window
- // right to keep it from over extending.
-
- if ( !wxIsNullDouble(adj->value) &&
- (adj->value + adj->page_size > adj->upper) )
- {
- adj->value = adj->upper - adj->page_size;
- if (adj->value < 0.0)
- adj->value = 0.0;
-
- if ( m_win->GetChildren().empty() )
- {
- // This is enough without child windows
- *pos = (int)adj->value;
- }
- else
- {
- // We need to actually scroll window
- g_signal_emit_by_name (adj, "value_changed");
- }
- }
+ // 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;
}
- *lines = (int)(adj->upper + 0.5);
- *linesPerPage = (int)(adj->page_increment + 0.5);
- g_signal_emit_by_name (adj, "changed");
+ 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);
+
+ // ensure that the scroll position is always in valid range
+ if (*pos > *lines)
+ *pos = *lines;
}
-void wxScrollHelperNative::AdjustScrollbars()
+void wxScrollHelper::AdjustScrollbars()
{
- int w, h;
int vw, vh;
+ m_targetWindow->GetVirtualSize(&vw, &vh);
+
+ int w, h;
+ const wxSize availSize = GetSizeAvailableForScrollTarget(
+ m_win->GetSize() - m_win->GetWindowBorderSize());
+ if ( availSize.x >= vw && availSize.y >= vh )
+ {
+ w = availSize.x;
+ h = availSize.y;
+
+ // we know that the scrollbars will be removed
+ DoAdjustHScrollbar(w, vw);
+ DoAdjustVScrollbar(h, vh);
+
+ return;
+ }
+
+ m_targetWindow->GetClientSize(&w, NULL);
+ DoAdjustHScrollbar(w, vw);
- m_targetWindow->GetClientSize( &w, &h );
- m_targetWindow->GetVirtualSize( &vw, &vh );
+ m_targetWindow->GetClientSize(NULL, &h);
+ DoAdjustVScrollbar(h, vh);
- DoAdjustScrollbar(m_win->m_hAdjust, m_xScrollPixelsPerLine, w, vw,
- &m_xScrollPosition, &m_xScrollLines, &m_xScrollLinesPerPage);
- DoAdjustScrollbar(m_win->m_vAdjust, m_yScrollPixelsPerLine, h, vh,
- &m_yScrollPosition, &m_yScrollLines, &m_yScrollLinesPerPage);
+ const int w_old = w;
+ m_targetWindow->GetClientSize(&w, NULL);
+ if ( w != w_old )
+ {
+ // 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);
+
+ m_targetWindow->GetClientSize(NULL, &h);
+ DoAdjustVScrollbar(h, vh);
+ }
}
-void wxScrollHelperNative::DoScroll(int orient,
- GtkAdjustment *adj,
+void wxScrollHelper::DoScrollOneDir(int orient,
int pos,
int pixelsPerLine,
int *posOld)
{
if ( pos != -1 && pos != *posOld && pixelsPerLine )
{
- int max = (int)(adj->upper - adj->page_size + 0.5);
- if (max < 0)
- max = 0;
- if (pos > max)
- pos = max;
- if (pos < 0)
- pos = 0;
-
- adj->value = pos;
+ m_win->SetScrollPos(orient, pos);
+ pos = m_win->GetScrollPos(orient);
int diff = (*posOld - pos)*pixelsPerLine;
m_targetWindow->ScrollWindow(orient == wxHORIZONTAL ? diff : 0,
orient == wxHORIZONTAL ? 0 : diff);
*posOld = pos;
-
- m_win->GtkUpdateScrollbar(orient);
}
}
-void wxScrollHelperNative::Scroll( int x_pos, int y_pos )
+void wxScrollHelper::DoScroll( int x_pos, int y_pos )
+{
+ wxCHECK_RET( m_targetWindow != 0, wxT("No target window") );
+
+ DoScrollOneDir(wxHORIZONTAL, x_pos, m_xScrollPixelsPerLine, &m_xScrollPosition);
+ DoScrollOneDir(wxVERTICAL, y_pos, m_yScrollPixelsPerLine, &m_yScrollPosition);
+}
+
+// ----------------------------------------------------------------------------
+// scrollbars visibility
+// ----------------------------------------------------------------------------
+
+namespace
{
- wxCHECK_RET( m_targetWindow != 0, _T("No target window") );
- DoScroll(wxHORIZONTAL, m_win->m_hAdjust, x_pos, m_xScrollPixelsPerLine,
- &m_xScrollPosition);
- DoScroll(wxVERTICAL, m_win->m_vAdjust, y_pos, m_yScrollPixelsPerLine,
- &m_yScrollPosition);
+GtkPolicyType GtkPolicyFromWX(wxScrollbarVisibility visibility)
+{
+ GtkPolicyType policy;
+ switch ( visibility )
+ {
+ case wxSHOW_SB_NEVER:
+ policy = GTK_POLICY_NEVER;
+ break;
+
+ case wxSHOW_SB_DEFAULT:
+ policy = GTK_POLICY_AUTOMATIC;
+ break;
+
+ default:
+ wxFAIL_MSG( wxS("unknown scrollbar visibility") );
+ // fall through
+
+ case wxSHOW_SB_ALWAYS:
+ policy = GTK_POLICY_ALWAYS;
+ break;
+ }
+
+ return policy;
}
+} // anonymous namespace
+
+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));
+}
projects / wxWidgets.git / blobdiff