wxScrolledWindow is now a native widget under GTK.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9928 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
550
src/gtk1/scrolwin.cpp
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550
src/gtk1/scrolwin.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: generic/scrolwin.cpp
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// Purpose: wxScrolledWindow implementation
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// Author: Julian Smart
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// Modified by:
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// Created: 01/02/97
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// RCS-ID: $Id$
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// Copyright: (c) Julian Smart and Markus Holzem
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#ifdef __GNUG__
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#pragma implementation "scrolwin.h"
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#include "wx/utils.h"
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#include "wx/dcclient.h"
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#include "wx/gtk/scrolwin.h"
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#include "wx/panel.h"
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#include <gtk/gtk.h>
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#include "wx/gtk/win_gtk.h"
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// ----------------------------------------------------------------------------
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// event tables
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// ----------------------------------------------------------------------------
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BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel)
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EVT_SIZE(wxScrolledWindow::OnSize)
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EVT_PAINT(wxScrolledWindow::OnPaint)
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EVT_CHAR(wxScrolledWindow::OnChar)
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END_EVENT_TABLE()
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IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel)
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// ============================================================================
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// implementation
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// ============================================================================
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//-----------------------------------------------------------------------------
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// data
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//-----------------------------------------------------------------------------
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extern bool g_blockEventsOnDrag;
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//-----------------------------------------------------------------------------
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// idle system
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//-----------------------------------------------------------------------------
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extern void wxapp_install_idle_handler();
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extern bool g_isIdle;
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//-----------------------------------------------------------------------------
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// "value_changed" from m_vAdjust
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//-----------------------------------------------------------------------------
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static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust, wxScrolledWindow *win )
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{
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if (g_isIdle)
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wxapp_install_idle_handler();
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if (g_blockEventsOnDrag) return;
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if (!win->m_hasVMT) return;
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win->GtkVScroll( adjust->value );
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}
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//-----------------------------------------------------------------------------
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// "value_changed" from m_hAdjust
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//-----------------------------------------------------------------------------
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static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust, wxScrolledWindow *win )
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{
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if (g_isIdle)
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wxapp_install_idle_handler();
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if (g_blockEventsOnDrag) return;
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if (!win->m_hasVMT) return;
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win->GtkHScroll( adjust->value );
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}
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//-----------------------------------------------------------------------------
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// InsertChild for wxScrolledWindow
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//-----------------------------------------------------------------------------
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static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child )
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{
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/* the window might have been scrolled already, do we
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have to adapt the position */
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GtkPizza *pizza = GTK_PIZZA(parent->m_wxwindow);
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child->m_x += pizza->xoffset;
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child->m_y += pizza->yoffset;
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gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow),
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GTK_WIDGET(child->m_widget),
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child->m_x,
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child->m_y,
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child->m_width,
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child->m_height );
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}
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// ----------------------------------------------------------------------------
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// wxScrolledWindow creation
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// ----------------------------------------------------------------------------
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wxScrolledWindow::wxScrolledWindow()
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{
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m_xScrollPixelsPerLine = 0;
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m_yScrollPixelsPerLine = 0;
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m_xScrollingEnabled = TRUE;
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m_yScrollingEnabled = TRUE;
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m_xScrollPosition = 0;
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m_yScrollPosition = 0;
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m_xScrollLines = 0;
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m_yScrollLines = 0;
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m_xScrollLinesPerPage = 0;
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m_yScrollLinesPerPage = 0;
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m_targetWindow = (wxWindow*) NULL;
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}
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bool wxScrolledWindow::Create(wxWindow *parent,
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wxWindowID id,
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const wxPoint& pos,
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const wxSize& size,
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long style,
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const wxString& name)
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{
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if (!PreCreation( parent, pos, size ) ||
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!CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
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{
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wxFAIL_MSG( wxT("wxWindow creation failed") );
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return FALSE;
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}
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m_insertCallback = wxInsertChildInScrolledWindow;
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m_xScrollPixelsPerLine = 0;
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m_yScrollPixelsPerLine = 0;
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m_xScrollingEnabled = TRUE;
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m_yScrollingEnabled = TRUE;
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m_xScrollPosition = 0;
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m_yScrollPosition = 0;
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m_xScrollLines = 0;
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m_yScrollLines = 0;
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m_xScrollLinesPerPage = 0;
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m_yScrollLinesPerPage = 0;
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m_targetWindow = this;
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m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
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GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
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GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
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GtkScrolledWindowClass *scroll_class = GTK_SCROLLED_WINDOW_CLASS( GTK_OBJECT_GET_CLASS(m_widget) );
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scroll_class->scrollbar_spacing = 0;
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gtk_scrolled_window_set_policy( scrolledWindow, GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
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m_hAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->hscrollbar) );
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m_vAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->vscrollbar) );
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m_wxwindow = gtk_pizza_new();
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gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
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GtkPizza *pizza = GTK_PIZZA(m_wxwindow);
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if (HasFlag(wxRAISED_BORDER))
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{
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gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_OUT );
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}
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else if (HasFlag(wxSUNKEN_BORDER))
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{
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gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_IN );
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}
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else if (HasFlag(wxSIMPLE_BORDER))
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{
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gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_THIN );
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}
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else
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{
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gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_NONE );
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}
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GTK_WIDGET_SET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
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m_acceptsFocus = TRUE;
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// I _really_ don't want scrollbars in the beginning
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m_vAdjust->lower = 0.0;
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m_vAdjust->upper = 1.0;
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m_vAdjust->value = 0.0;
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m_vAdjust->step_increment = 1.0;
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m_vAdjust->page_increment = 1.0;
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gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
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m_hAdjust->lower = 0.0;
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m_hAdjust->upper = 1.0;
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m_hAdjust->value = 0.0;
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m_hAdjust->step_increment = 1.0;
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m_hAdjust->page_increment = 1.0;
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gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
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// these handlers get notified when screen updates are required either when
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// scrolling or when the window size (and therefore scrollbar configuration)
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// has changed
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gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
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(GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
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gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
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(GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
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gtk_widget_show( m_wxwindow );
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if (m_parent)
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m_parent->DoAddChild( this );
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PostCreation();
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Show( TRUE );
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return TRUE;
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}
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wxScrolledWindow::~wxScrolledWindow()
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{
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}
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// ----------------------------------------------------------------------------
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// setting scrolling parameters
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// ----------------------------------------------------------------------------
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/*
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* pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line)
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* noUnitsX/noUnitsY: : no. units per scrollbar
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*/
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void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY,
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int noUnitsX, int noUnitsY,
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int xPos, int yPos, bool noRefresh )
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{
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m_xScrollPixelsPerLine = pixelsPerUnitX;
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m_yScrollPixelsPerLine = pixelsPerUnitY;
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m_xScrollPosition = xPos;
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m_yScrollPosition = yPos;
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m_xScrollLines = noUnitsX;
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m_yScrollLines = noUnitsY;
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m_hAdjust->lower = 0.0;
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m_hAdjust->upper = noUnitsX;
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m_hAdjust->value = xPos;
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m_hAdjust->step_increment = 1.0;
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m_hAdjust->page_increment = 1.0;
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m_vAdjust->lower = 0.0;
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m_vAdjust->upper = noUnitsY;
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m_vAdjust->value = yPos;
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m_vAdjust->step_increment = 1.0;
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m_vAdjust->page_increment = 1.0;
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AdjustScrollbars();
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}
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void wxScrolledWindow::AdjustScrollbars()
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{
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int w, h;
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m_targetWindow->GetClientSize( &w, &h );
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if (m_xScrollPixelsPerLine == 0)
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m_hAdjust->page_size = 1.0;
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else
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m_hAdjust->page_size = (w / m_xScrollPixelsPerLine);
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if (m_yScrollPixelsPerLine == 0)
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m_vAdjust->page_size = 1.0;
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else
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m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
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gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
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gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
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}
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// ----------------------------------------------------------------------------
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// target window handling
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// ----------------------------------------------------------------------------
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void wxScrolledWindow::SetTargetWindow( wxWindow *target )
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{
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wxASSERT_MSG( target, wxT("target window must not be NULL") );
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m_targetWindow = target;
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}
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wxWindow *wxScrolledWindow::GetTargetWindow()
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{
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return m_targetWindow;
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}
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// Override this function if you don't want to have wxScrolledWindow
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// automatically change the origin according to the scroll position.
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void wxScrolledWindow::PrepareDC(wxDC& dc)
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{
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dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
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-m_yScrollPosition * m_yScrollPixelsPerLine );
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}
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void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
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{
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if ( x_unit )
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*x_unit = m_xScrollPixelsPerLine;
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if ( y_unit )
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*y_unit = m_yScrollPixelsPerLine;
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}
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int wxScrolledWindow::GetScrollPageSize(int orient) const
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{
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if ( orient == wxHORIZONTAL )
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return m_xScrollLinesPerPage;
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else
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return m_yScrollLinesPerPage;
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}
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void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
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{
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if ( orient == wxHORIZONTAL )
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m_xScrollLinesPerPage = pageSize;
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else
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m_yScrollLinesPerPage = pageSize;
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}
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/*
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* Scroll to given position (scroll position, not pixel position)
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*/
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void wxScrolledWindow::Scroll( int x_pos, int y_pos )
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{
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if (!m_targetWindow)
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return;
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if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
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((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
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int w, h;
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m_targetWindow->GetClientSize(&w, &h);
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if ((x_pos != -1) && (m_xScrollPixelsPerLine))
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{
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int old_x = m_xScrollPosition;
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m_xScrollPosition = x_pos;
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// Calculate page size i.e. number of scroll units you get on the
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// current client window
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int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
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if (noPagePositions < 1) noPagePositions = 1;
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// Correct position if greater than extent of canvas minus
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// the visible portion of it or if below zero
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m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition );
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m_xScrollPosition = wxMax( 0, m_xScrollPosition );
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if (old_x != m_xScrollPosition) {
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m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
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}
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}
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if ((y_pos != -1) && (m_yScrollPixelsPerLine))
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{
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int old_y = m_yScrollPosition;
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m_yScrollPosition = y_pos;
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// Calculate page size i.e. number of scroll units you get on the
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// current client window
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int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
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if (noPagePositions < 1) noPagePositions = 1;
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// Correct position if greater than extent of canvas minus
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// the visible portion of it or if below zero
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m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
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m_yScrollPosition = wxMax( 0, m_yScrollPosition );
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if (old_y != m_yScrollPosition) {
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m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
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}
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}
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}
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void wxScrolledWindow::GtkVScroll( float value )
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{
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Scroll( -1, (int)(value+0.5) );
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}
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void wxScrolledWindow::GtkHScroll( float value )
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{
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Scroll( (int)(value+0.5), -1 );
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}
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void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
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{
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m_xScrollingEnabled = x_scroll;
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m_yScrollingEnabled = y_scroll;
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}
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void wxScrolledWindow::GetVirtualSize (int *x, int *y) const
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{
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if ( x )
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*x = m_xScrollPixelsPerLine * m_xScrollLines;
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if ( y )
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*y = m_yScrollPixelsPerLine * m_yScrollLines;
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}
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// Where the current view starts from
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void wxScrolledWindow::GetViewStart (int *x, int *y) const
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{
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if ( x )
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*x = m_xScrollPosition;
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if ( y )
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*y = m_yScrollPosition;
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}
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void wxScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const
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{
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if ( xx )
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*xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
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if ( yy )
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*yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
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}
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void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
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{
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if ( xx )
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*xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
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if ( yy )
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*yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
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}
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// ----------------------------------------------------------------------------
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// event handlers
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// ----------------------------------------------------------------------------
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// Default OnSize resets scrollbars, if any
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void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
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{
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#if wxUSE_CONSTRAINTS
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if (GetAutoLayout())
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Layout();
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#endif
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AdjustScrollbars();
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}
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// This calls OnDraw, having adjusted the origin according to the current
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// scroll position
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void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
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{
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wxPaintDC dc(this);
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PrepareDC(dc);
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||||
OnDraw(dc);
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}
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||||
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// 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
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||||
void wxScrolledWindow::OnChar(wxKeyEvent& event)
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||||
{
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||||
int stx, sty, // view origin
|
||||
szx, szy, // view size (total)
|
||||
clix, cliy; // view size (on screen)
|
||||
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||||
ViewStart(&stx, &sty);
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||||
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 dsty;
|
||||
switch ( event.KeyCode() )
|
||||
{
|
||||
case WXK_PAGEUP:
|
||||
case WXK_PRIOR:
|
||||
dsty = sty - (5 * cliy / 6);
|
||||
Scroll(-1, (dsty == -1) ? 0 : dsty);
|
||||
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);
|
||||
break;
|
||||
|
||||
default:
|
||||
// not for us
|
||||
event.Skip();
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user