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DH 2012-11-15 01:39:56 +02:00
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wxWidgets/src/generic/sashwin.cpp Normal file
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/////////////////////////////////////////////////////////////////////////////
// Name: src/generic/sashwin.cpp
// Purpose: wxSashWindow implementation. A sash window has an optional
// sash on each edge, allowing it to be dragged. An event
// is generated when the sash is released.
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// RCS-ID: $Id: sashwin.cpp 51249 2008-01-16 13:50:23Z JS $
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_SASH
#include "wx/sashwin.h"
#ifndef WX_PRECOMP
#include "wx/dialog.h"
#include "wx/frame.h"
#include "wx/settings.h"
#include "wx/dcclient.h"
#include "wx/dcscreen.h"
#include "wx/math.h"
#endif
#include <stdlib.h>
#include "wx/laywin.h"
DEFINE_EVENT_TYPE(wxEVT_SASH_DRAGGED)
IMPLEMENT_DYNAMIC_CLASS(wxSashWindow, wxWindow)
IMPLEMENT_DYNAMIC_CLASS(wxSashEvent, wxCommandEvent)
BEGIN_EVENT_TABLE(wxSashWindow, wxWindow)
EVT_PAINT(wxSashWindow::OnPaint)
EVT_SIZE(wxSashWindow::OnSize)
EVT_MOUSE_EVENTS(wxSashWindow::OnMouseEvent)
#if defined( __WXMSW__ ) || defined( __WXMAC__)
EVT_SET_CURSOR(wxSashWindow::OnSetCursor)
#endif // __WXMSW__ || __WXMAC__
END_EVENT_TABLE()
bool wxSashWindow::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos,
const wxSize& size, long style, const wxString& name)
{
return wxWindow::Create(parent, id, pos, size, style, name);
}
wxSashWindow::~wxSashWindow()
{
delete m_sashCursorWE;
delete m_sashCursorNS;
}
void wxSashWindow::Init()
{
m_draggingEdge = wxSASH_NONE;
m_dragMode = wxSASH_DRAG_NONE;
m_oldX = 0;
m_oldY = 0;
m_firstX = 0;
m_firstY = 0;
m_borderSize = 3;
m_extraBorderSize = 0;
m_minimumPaneSizeX = 0;
m_minimumPaneSizeY = 0;
m_maximumPaneSizeX = 10000;
m_maximumPaneSizeY = 10000;
m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
m_mouseCaptured = false;
m_currentCursor = NULL;
// Eventually, we'll respond to colour change messages
InitColours();
}
void wxSashWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
{
wxPaintDC dc(this);
DrawBorders(dc);
DrawSashes(dc);
}
void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
{
wxCoord x = 0, y = 0;
event.GetPosition(&x, &y);
wxSashEdgePosition sashHit = SashHitTest(x, y);
if (event.LeftDown())
{
CaptureMouse();
m_mouseCaptured = true;
if ( sashHit != wxSASH_NONE )
{
// Required for X to specify that
// that we wish to draw on top of all windows
// - and we optimise by specifying the area
// for creating the overlap window.
// Find the first frame or dialog and use this to specify
// the area to draw on.
wxWindow* parent = this;
while (parent && !parent->IsKindOf(CLASSINFO(wxDialog)) &&
!parent->IsKindOf(CLASSINFO(wxFrame)))
parent = parent->GetParent();
wxScreenDC::StartDrawingOnTop(parent);
// We don't say we're dragging yet; we leave that
// decision for the Dragging() branch, to ensure
// the user has dragged a little bit.
m_dragMode = wxSASH_DRAG_LEFT_DOWN;
m_draggingEdge = sashHit;
m_firstX = x;
m_firstY = y;
if ( (sashHit == wxSASH_LEFT) || (sashHit == wxSASH_RIGHT) )
{
if (m_currentCursor != m_sashCursorWE)
{
SetCursor(*m_sashCursorWE);
}
m_currentCursor = m_sashCursorWE;
}
else
{
if (m_currentCursor != m_sashCursorNS)
{
SetCursor(*m_sashCursorNS);
}
m_currentCursor = m_sashCursorNS;
}
}
}
else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
{
// Wasn't a proper drag
if (m_mouseCaptured)
ReleaseMouse();
m_mouseCaptured = false;
wxScreenDC::EndDrawingOnTop();
m_dragMode = wxSASH_DRAG_NONE;
m_draggingEdge = wxSASH_NONE;
}
else if (event.LeftUp() && m_dragMode == wxSASH_DRAG_DRAGGING)
{
// We can stop dragging now and see what we've got.
m_dragMode = wxSASH_DRAG_NONE;
if (m_mouseCaptured)
ReleaseMouse();
m_mouseCaptured = false;
// Erase old tracker
DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
// End drawing on top (frees the window used for drawing
// over the screen)
wxScreenDC::EndDrawingOnTop();
int w, h;
GetSize(&w, &h);
int xp, yp;
GetPosition(&xp, &yp);
wxSashEdgePosition edge = m_draggingEdge;
m_draggingEdge = wxSASH_NONE;
wxRect dragRect;
wxSashDragStatus status = wxSASH_STATUS_OK;
// the new height and width of the window - if -1, it didn't change
int newHeight = wxDefaultCoord,
newWidth = wxDefaultCoord;
// NB: x and y may be negative and they're relative to the sash window
// upper left corner, while xp and yp are expressed in the parent
// window system of coordinates, so adjust them! After this
// adjustment, all coordinates are relative to the parent window.
y += yp;
x += xp;
switch (edge)
{
case wxSASH_TOP:
if ( y > yp + h )
{
// top sash shouldn't get below the bottom one
status = wxSASH_STATUS_OUT_OF_RANGE;
}
else
{
newHeight = h - (y - yp);
}
break;
case wxSASH_BOTTOM:
if ( y < yp )
{
// bottom sash shouldn't get above the top one
status = wxSASH_STATUS_OUT_OF_RANGE;
}
else
{
newHeight = y - yp;
}
break;
case wxSASH_LEFT:
if ( x > xp + w )
{
// left sash shouldn't get beyond the right one
status = wxSASH_STATUS_OUT_OF_RANGE;
}
else
{
newWidth = w - (x - xp);
}
break;
case wxSASH_RIGHT:
if ( x < xp )
{
// and the right sash, finally, shouldn't be beyond the
// left one
status = wxSASH_STATUS_OUT_OF_RANGE;
}
else
{
newWidth = x - xp;
}
break;
case wxSASH_NONE:
// can this happen at all?
break;
}
if ( newHeight == wxDefaultCoord )
{
// didn't change
newHeight = h;
}
else
{
// make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
newHeight = wxMax(newHeight, m_minimumPaneSizeY);
newHeight = wxMin(newHeight, m_maximumPaneSizeY);
}
if ( newWidth == wxDefaultCoord )
{
// didn't change
newWidth = w;
}
else
{
// make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
newWidth = wxMax(newWidth, m_minimumPaneSizeX);
newWidth = wxMin(newWidth, m_maximumPaneSizeX);
}
dragRect = wxRect(x, y, newWidth, newHeight);
wxSashEvent eventSash(GetId(), edge);
eventSash.SetEventObject(this);
eventSash.SetDragStatus(status);
eventSash.SetDragRect(dragRect);
GetEventHandler()->ProcessEvent(eventSash);
}
else if ( event.LeftUp() )
{
if (m_mouseCaptured)
ReleaseMouse();
m_mouseCaptured = false;
}
else if ((event.Moving() || event.Leaving()) && !event.Dragging())
{
// Just change the cursor if required
if ( sashHit != wxSASH_NONE )
{
if ( (sashHit == wxSASH_LEFT) || (sashHit == wxSASH_RIGHT) )
{
if (m_currentCursor != m_sashCursorWE)
{
SetCursor(*m_sashCursorWE);
}
m_currentCursor = m_sashCursorWE;
}
else
{
if (m_currentCursor != m_sashCursorNS)
{
SetCursor(*m_sashCursorNS);
}
m_currentCursor = m_sashCursorNS;
}
}
else
{
SetCursor(wxNullCursor);
m_currentCursor = NULL;
}
}
else if ( event.Dragging() &&
((m_dragMode == wxSASH_DRAG_DRAGGING) ||
(m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
{
if ( (m_draggingEdge == wxSASH_LEFT) || (m_draggingEdge == wxSASH_RIGHT) )
{
if (m_currentCursor != m_sashCursorWE)
{
SetCursor(*m_sashCursorWE);
}
m_currentCursor = m_sashCursorWE;
}
else
{
if (m_currentCursor != m_sashCursorNS)
{
SetCursor(*m_sashCursorNS);
}
m_currentCursor = m_sashCursorNS;
}
if (m_dragMode == wxSASH_DRAG_LEFT_DOWN)
{
m_dragMode = wxSASH_DRAG_DRAGGING;
DrawSashTracker(m_draggingEdge, x, y);
}
else
{
if ( m_dragMode == wxSASH_DRAG_DRAGGING )
{
// Erase old tracker
DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
// Draw new one
DrawSashTracker(m_draggingEdge, x, y);
}
}
m_oldX = x;
m_oldY = y;
}
else if ( event.LeftDClick() )
{
// Nothing
}
else
{
}
}
void wxSashWindow::OnSize(wxSizeEvent& WXUNUSED(event))
{
SizeWindows();
}
wxSashEdgePosition wxSashWindow::SashHitTest(int x, int y, int WXUNUSED(tolerance))
{
int cx, cy;
GetClientSize(& cx, & cy);
int i;
for (i = 0; i < 4; i++)
{
wxSashEdge& edge = m_sashes[i];
wxSashEdgePosition position = (wxSashEdgePosition) i ;
if (edge.m_show)
{
switch (position)
{
case wxSASH_TOP:
{
if (y >= 0 && y <= GetEdgeMargin(position))
return wxSASH_TOP;
break;
}
case wxSASH_RIGHT:
{
if ((x >= cx - GetEdgeMargin(position)) && (x <= cx))
return wxSASH_RIGHT;
break;
}
case wxSASH_BOTTOM:
{
if ((y >= cy - GetEdgeMargin(position)) && (y <= cy))
return wxSASH_BOTTOM;
break;
}
case wxSASH_LEFT:
{
if ((x <= GetEdgeMargin(position)) && (x >= 0))
return wxSASH_LEFT;
break;
}
case wxSASH_NONE:
{
break;
}
}
}
}
return wxSASH_NONE;
}
// Draw 3D effect borders
void wxSashWindow::DrawBorders(wxDC& dc)
{
int w, h;
GetClientSize(&w, &h);
wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
wxPen hilightPen(m_hilightColour, 1, wxSOLID);
if ( GetWindowStyleFlag() & wxSW_3DBORDER )
{
dc.SetPen(mediumShadowPen);
dc.DrawLine(0, 0, w-1, 0);
dc.DrawLine(0, 0, 0, h - 1);
dc.SetPen(darkShadowPen);
dc.DrawLine(1, 1, w-2, 1);
dc.DrawLine(1, 1, 1, h-2);
dc.SetPen(hilightPen);
dc.DrawLine(0, h-1, w-1, h-1);
dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
/// Anyway, h is required for MSW.
dc.SetPen(lightShadowPen);
dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
dc.DrawLine(1, h-2, w-1, h-2); // Bottom
}
else if ( GetWindowStyleFlag() & wxSW_BORDER )
{
dc.SetBrush(*wxTRANSPARENT_BRUSH);
dc.SetPen(*wxBLACK_PEN);
dc.DrawRectangle(0, 0, w-1, h-1);
}
dc.SetPen(wxNullPen);
dc.SetBrush(wxNullBrush);
}
void wxSashWindow::DrawSashes(wxDC& dc)
{
int i;
for (i = 0; i < 4; i++)
if (m_sashes[i].m_show)
DrawSash((wxSashEdgePosition) i, dc);
}
// Draw the sash
void wxSashWindow::DrawSash(wxSashEdgePosition edge, wxDC& dc)
{
int w, h;
GetClientSize(&w, &h);
wxPen facePen(m_faceColour, 1, wxSOLID);
wxBrush faceBrush(m_faceColour, wxSOLID);
wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
wxPen hilightPen(m_hilightColour, 1, wxSOLID);
wxColour blackClr(0, 0, 0);
wxColour whiteClr(255, 255, 255);
wxPen blackPen(blackClr, 1, wxSOLID);
wxPen whitePen(whiteClr, 1, wxSOLID);
if ( edge == wxSASH_LEFT || edge == wxSASH_RIGHT )
{
int sashPosition = (edge == wxSASH_LEFT) ? 0 : ( w - GetEdgeMargin(edge) );
dc.SetPen(facePen);
dc.SetBrush(faceBrush);
dc.DrawRectangle(sashPosition, 0, GetEdgeMargin(edge), h);
if (GetWindowStyleFlag() & wxSW_3DSASH)
{
if (edge == wxSASH_LEFT)
{
// Draw a dark grey line on the left to indicate that the
// sash is raised
dc.SetPen(mediumShadowPen);
dc.DrawLine(GetEdgeMargin(edge), 0, GetEdgeMargin(edge), h);
}
else
{
// Draw a highlight line on the right to indicate that the
// sash is raised
dc.SetPen(hilightPen);
dc.DrawLine(w - GetEdgeMargin(edge), 0, w - GetEdgeMargin(edge), h);
}
}
}
else // top or bottom
{
int sashPosition = (edge == wxSASH_TOP) ? 0 : ( h - GetEdgeMargin(edge) );
dc.SetPen(facePen);
dc.SetBrush(faceBrush);
dc.DrawRectangle(0, sashPosition, w, GetEdgeMargin(edge));
if (GetWindowStyleFlag() & wxSW_3DSASH)
{
if (edge == wxSASH_BOTTOM)
{
// Draw a highlight line on the bottom to indicate that the
// sash is raised
dc.SetPen(hilightPen);
dc.DrawLine(0, h - GetEdgeMargin(edge), w, h - GetEdgeMargin(edge));
}
else
{
// Draw a drak grey line on the top to indicate that the
// sash is raised
dc.SetPen(mediumShadowPen);
dc.DrawLine(1, GetEdgeMargin(edge), w-1, GetEdgeMargin(edge));
}
}
}
dc.SetPen(wxNullPen);
dc.SetBrush(wxNullBrush);
}
// Draw the sash tracker (for whilst moving the sash)
void wxSashWindow::DrawSashTracker(wxSashEdgePosition edge, int x, int y)
{
int w, h;
GetClientSize(&w, &h);
wxScreenDC screenDC;
int x1, y1;
int x2, y2;
if ( edge == wxSASH_LEFT || edge == wxSASH_RIGHT )
{
x1 = x; y1 = 2;
x2 = x; y2 = h-2;
if ( (edge == wxSASH_LEFT) && (x1 > w) )
{
x1 = w; x2 = w;
}
else if ( (edge == wxSASH_RIGHT) && (x1 < 0) )
{
x1 = 0; x2 = 0;
}
}
else
{
x1 = 2; y1 = y;
x2 = w-2; y2 = y;
if ( (edge == wxSASH_TOP) && (y1 > h) )
{
y1 = h;
y2 = h;
}
else if ( (edge == wxSASH_BOTTOM) && (y1 < 0) )
{
y1 = 0;
y2 = 0;
}
}
ClientToScreen(&x1, &y1);
ClientToScreen(&x2, &y2);
wxPen sashTrackerPen(*wxBLACK, 2, wxSOLID);
screenDC.SetLogicalFunction(wxINVERT);
screenDC.SetPen(sashTrackerPen);
screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
screenDC.DrawLine(x1, y1, x2, y2);
screenDC.SetLogicalFunction(wxCOPY);
screenDC.SetPen(wxNullPen);
screenDC.SetBrush(wxNullBrush);
}
// Position and size subwindows.
// Note that the border size applies to each subwindow, not
// including the edges next to the sash.
void wxSashWindow::SizeWindows()
{
int cw, ch;
GetClientSize(&cw, &ch);
if (GetChildren().GetCount() == 1)
{
wxWindow* child = GetChildren().GetFirst()->GetData();
int x = 0;
int y = 0;
int width = cw;
int height = ch;
// Top
if (m_sashes[0].m_show)
{
y = m_borderSize;
height -= m_borderSize;
}
y += m_extraBorderSize;
// Left
if (m_sashes[3].m_show)
{
x = m_borderSize;
width -= m_borderSize;
}
x += m_extraBorderSize;
// Right
if (m_sashes[1].m_show)
{
width -= m_borderSize;
}
width -= 2*m_extraBorderSize;
// Bottom
if (m_sashes[2].m_show)
{
height -= m_borderSize;
}
height -= 2*m_extraBorderSize;
child->SetSize(x, y, width, height);
}
else if (GetChildren().GetCount() > 1)
{
// Perhaps multiple children are themselves sash windows.
// TODO: this doesn't really work because the subwindows sizes/positions
// must be set to leave a gap for the parent's sash (hit-test and decorations).
// Perhaps we can allow for this within LayoutWindow, testing whether the parent
// is a sash window, and if so, allowing some space for the edges.
wxLayoutAlgorithm layout;
layout.LayoutWindow(this);
}
wxClientDC dc(this);
DrawBorders(dc);
DrawSashes(dc);
}
// Initialize colours
void wxSashWindow::InitColours()
{
// Shadow colours
m_faceColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
m_mediumShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW);
m_darkShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW);
m_lightShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT);
m_hilightColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT);
}
void wxSashWindow::SetSashVisible(wxSashEdgePosition edge, bool sash)
{
m_sashes[edge].m_show = sash;
if (sash)
m_sashes[edge].m_margin = m_borderSize;
else
m_sashes[edge].m_margin = 0;
}
#if defined( __WXMSW__ ) || defined( __WXMAC__)
// this is currently called (and needed) under MSW only...
void wxSashWindow::OnSetCursor(wxSetCursorEvent& event)
{
// if we don't do it, the resizing cursor might be set for child window:
// and like this we explicitly say that our cursor should not be used for
// children windows which overlap us
if ( SashHitTest(event.GetX(), event.GetY()) != wxSASH_NONE)
{
// default processing is ok
event.Skip();
}
//else: do nothing, in particular, don't call Skip()
}
#endif // __WXMSW__ || __WXMAC__
#endif // wxUSE_SASH