src/TortoiseIDiff/PicWindow.h

   1 // TortoiseIDiff - an image diff viewer in TortoiseSVN
   2
   3 // Copyright (C) 2006-2010, 2012-2013 - TortoiseSVN
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 #pragma once
  20 #include <CommCtrl.h>
  21 #include "BaseWindow.h"
  22 #include "TortoiseIDiff.h"
  23 #include "Picture.h"
  24 #include "NiceTrackbar.h"
  25
  26 #define HEADER_HEIGHT 30
  27
  28 #define ID_ANIMATIONTIMER 100
  29 #define TIMER_ALPHASLIDER 101
  30 #define ID_ALPHATOGGLETIMER 102
  31
  32 #define LEFTBUTTON_ID           101
  33 #define RIGHTBUTTON_ID          102
  34 #define PLAYBUTTON_ID           103
  35 #define ALPHATOGGLEBUTTON_ID    104
  36 #define BLENDALPHA_ID           105
  37 #define BLENDXOR_ID             106
  38 #define SELECTBUTTON_ID         107
  39
  40 #define TRACKBAR_ID 101
  41 #define SLIDER_HEIGHT 30
  42 #define SLIDER_WIDTH 30
  43
  44
  45 #ifndef GET_X_LPARAM
  46 #define GET_X_LPARAM(lp)                        ((int)(short)LOWORD(lp))
  47 #endif
  48 #ifndef GET_Y_LPARAM
  49 #define GET_Y_LPARAM(lp)                        ((int)(short)HIWORD(lp))
  50 #endif
  51
  52 /**
  53  * \ingroup TortoiseIDiff
  54  * The image view window.
  55  * Shows an image and provides methods to scale the image or alpha blend it
  56  * over another image.
  57  */
  58 class CPicWindow : public CWindow
  59 {
  60 private:
  61     CPicWindow() : CWindow(NULL) {}
  62 public:
  63     CPicWindow(HINSTANCE hInst, const WNDCLASSEX* wcx = NULL) : CWindow(hInst, wcx)
  64         , bValid(false)
  65         , nHScrollPos(0)
  66         , nVScrollPos(0)
  67         , picscale(100)
  68         , transparentColor(::GetSysColor(COLOR_WINDOW))
  69         , pSecondPic(NULL)
  70         , blendAlpha(0.5f)
  71         , bShowInfo(false)
  72         , nDimensions(0)
  73         , nCurrentDimension(1)
  74         , nFrames(0)
  75         , nCurrentFrame(1)
  76         , bPlaying(false)
  77         , pTheOtherPic(NULL)
  78         , bLinkedPositions(true)
  79         , bFitWidths(false)
  80         , bFitHeights(false)
  81         , bOverlap(false)
  82         , m_blend(BLEND_ALPHA)
  83         , bMainPic(false)
  84         , bFirstpaint(false)
  85         , nVSecondScrollPos(0)
  86         , nHSecondScrollPos(0)
  87         , startVScrollPos(0)
  88         , startHScrollPos(0)
  89         , startVSecondScrollPos(0)
  90         , startHSecondScrollPos(0)
  91         , hwndTT(0)
  92         , hwndLeftBtn(0)
  93         , hwndRightBtn(0)
  94         , hwndPlayBtn(0)
  95         , hwndSelectBtn(0)
  96         , hwndAlphaToggleBtn(0)
  97         , hLeft(0)
  98         , hRight(0)
  99         , hPlay(0)
 100         , hStop(0)
 101         , hAlphaToggle(0)
 102         , m_linkedWidth(0)
 103         , m_linkedHeight(0)
 104         , bDragging(false)
 105         , bSelectionMode(false)
 106     {
 107         SetWindowTitle(_T("Picture Window"));
 108         m_lastTTPos.x = 0;
 109         m_lastTTPos.y = 0;
 110         m_wszTip[0]   = 0;
 111         m_szTip[0]    = 0;
 112         ptPanStart.x = -1;
 113         ptPanStart.y = -1;
 114         m_inforect.left = 0;
 115         m_inforect.right = 0;
 116         m_inforect.bottom = 0;
 117         m_inforect.top = 0;
 118     };
 119
 120     enum BlendType
 121     {
 122         BLEND_ALPHA,
 123         BLEND_XOR,
 124     };
 125     /// Registers the window class and creates the window
 126     bool RegisterAndCreateWindow(HWND hParent);
 127
 128     /// Sets the image path and title to show
 129     void SetPic(tstring path, tstring title, bool bFirst);
 130     /// Returns the CPicture image object. Used to get an already loaded image
 131     /// object without having to load it again.
 132     CPicture * GetPic() {return &picture;}
 133     /// Sets the path and title of the second image which is alpha blended over the original
 134     void SetSecondPic(CPicture * pPicture = NULL, const tstring& sectit = _T(""), const tstring& secpath = _T(""), int hpos = 0, int vpos = 0)
 135     {
 136         pSecondPic = pPicture;
 137         pictitle2 = sectit;
 138         picpath2 = secpath;
 139         nVSecondScrollPos = vpos;
 140         nHSecondScrollPos = hpos;
 141     }
 142
 143     void StopTimer() {KillTimer(*this, ID_ANIMATIONTIMER);}
 144
 145     /// Returns the currently used alpha blending value (0.0-1.0)
 146     float GetBlendAlpha() const { return blendAlpha; }
 147     /// Sets the alpha blending value
 148     void SetBlendAlpha(BlendType type, float a)
 149     {
 150         m_blend = type;
 151         blendAlpha = a;
 152         if (m_AlphaSlider.IsValid())
 153             SendMessage(m_AlphaSlider.GetWindow(), TBM_SETPOS, (WPARAM)1, (LPARAM)(a*16.0f));
 154         PositionTrackBar();
 155         InvalidateRect(*this, NULL, FALSE);
 156     }
 157     /// Toggle the alpha blending value
 158     void ToggleAlpha()
 159     {
 160         if( 0.0f != GetBlendAlpha() )
 161             SetBlendAlpha(m_blend, 0.0f);
 162         else
 163             SetBlendAlpha(m_blend, 1.0f);
 164     }
 165
 166     /// Set the color that this PicWindow will display behind transparent images.
 167     void SetTransparentColor(COLORREF back) { transparentColor = back; InvalidateRect(*this, NULL, false); }
 168
 169     /// Resizes the image to fit into the window. Small images are not enlarged.
 170     void FitImageInWindow();
 171     /// center the image in the view
 172     void CenterImage();
 173     /// forces the widths of the images to be the same
 174     void FitWidths(bool bFit);
 175     /// forces the heights of the images to be the same
 176     void FitHeights(bool bFit);
 177     /// Sets the zoom factor of the image
 178     void SetZoom(int Zoom, bool centermouse, bool inzoom = false);
 179     /// Returns the currently used zoom factor in which the image is shown.
 180     int GetZoom() {return picscale;}
 181     /// Zooms in (true) or out (false) in nice steps
 182     void Zoom(bool in, bool centermouse);
 183     /// Sets the 'Other' pic window
 184     void SetOtherPicWindow(CPicWindow * pWnd) {pTheOtherPic = pWnd;}
 185     /// Links/Unlinks the two pic windows
 186     void LinkPositions(bool bLink) {bLinkedPositions = bLink;}
 187     /// Sets the overlay mode info
 188     void SetOverlapMode(bool b) {bOverlap = b;}
 189
 190     void ShowInfo(bool bShow = true) {bShowInfo = bShow; InvalidateRect(*this, NULL, false);}
 191     /// Sets up the scrollbars as needed
 192     void SetupScrollBars();
 193
 194     bool HasMultipleImages();
 195
 196     int GetHPos() {return nHScrollPos;}
 197     int GetVPos() {return nVScrollPos;}
 198     void SetZoomValue(int z) {picscale = z; InvalidateRect(*this, NULL, FALSE);}
 199
 200     void SetSelectionMode(bool bSelect = true) { bSelectionMode = bSelect; }
 201     /// Handles the mouse wheel
 202     void                OnMouseWheel(short fwKeys, short zDelta);
 203 protected:
 204     /// the message handler for this window
 205     LRESULT CALLBACK    WinMsgHandler(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 206     /// Draws the view title bar
 207     void                DrawViewTitle(HDC hDC, RECT * rect);
 208     /// Creates the image buttons
 209     bool                CreateButtons();
 210     /// Handles vertical scrolling
 211     void                OnVScroll(UINT nSBCode, UINT nPos);
 212     /// Handles horizontal scrolling
 213     void                OnHScroll(UINT nSBCode, UINT nPos);
 214     /// Returns the client rectangle, without the scrollbars and the view title.
 215     /// Basically the rectangle the image can use.
 216     void                GetClientRect(RECT * pRect);
 217     /// Returns the client rectangle, without the view title but with the scrollbars
 218     void                GetClientRectWithScrollbars(RECT * pRect);
 219     /// the WM_PAINT function
 220     void                Paint(HWND hwnd);
 221     /// Draw pic to hdc, with a border, scaled by scale.
 222     void                ShowPicWithBorder(HDC hdc, const RECT &bounds, CPicture &pic, int scale);
 223     /// Positions the buttons
 224     void                PositionChildren();
 225     /// advance to the next image in the file
 226     void                NextImage();
 227     /// go back to the previous image in the file
 228     void                PrevImage();
 229     /// starts/stops the animation
 230     void                Animate(bool bStart);
 231     /// Creates the trackbar (the alpha blending slider control)
 232     void                CreateTrackbar(HWND hwndParent);
 233     /// Moves the alpha slider trackbar to the correct position
 234     void                PositionTrackBar();
 235     /// creates the info string used in the info box and the tooltips
 236     void                BuildInfoString(TCHAR * buf, int size, bool bTooltip);
 237     /// adjusts the zoom to fit the specified width
 238     void                SetZoomToWidth(long width);
 239     /// adjusts the zoom to fit the specified height
 240     void                SetZoomToHeight(long height);
 241
 242
 243     tstring             picpath;            ///< the path to the image we show
 244     tstring             pictitle;           ///< the string to show in the image view as a title
 245     CPicture            picture;            ///< the picture object of the image
 246     bool                bValid;             ///< true if the picture object is valid, i.e. if the image could be loaded and can be shown
 247     int                 picscale;           ///< the scale factor of the image in percent
 248     COLORREF            transparentColor;   ///< the color to draw under the images
 249     bool                bFirstpaint;        ///< true if the image is painted the first time. Used to initialize some stuff when the window is valid for sure.
 250     CPicture *          pSecondPic;         ///< if set, this is the picture to draw transparently above the original
 251     CPicWindow *        pTheOtherPic;       ///< pointer to the other picture window. Used for "linking" the two windows when scrolling/zooming/...
 252     bool                bMainPic;           ///< if true, this is the first image
 253     bool                bLinkedPositions;   ///< if true, the two image windows are linked together for scrolling/zooming/...
 254     bool                bFitWidths;         ///< if true, the two image windows are shown with the same width
 255     bool                bFitHeights;        ///< if true, the two image windows are shown with the same height
 256     bool                bOverlap;           ///< true if the overlay mode is active
 257     bool                bDragging;          ///< indicates an ongoing dragging operation
 258     BlendType           m_blend;            ///< type of blending to use
 259     tstring             pictitle2;          ///< the title of the second picture
 260     tstring             picpath2;           ///< the path of the second picture
 261     float               blendAlpha;         ///<the alpha value for transparency blending
 262     bool                bShowInfo;          ///< true if the info rectangle of the image should be shown
 263     TCHAR               m_wszTip[8192];
 264     char                m_szTip[8192];
 265     POINT               m_lastTTPos;
 266     HWND                hwndTT;
 267     bool                bSelectionMode;     ///< true if TortoiseIDiff is in selection mode, used to resolve conflicts
 268     // scrollbar info
 269     int                 nVScrollPos;        ///< vertical scroll position
 270     int                 nHScrollPos;        ///< horizontal scroll position
 271     int                 nVSecondScrollPos;  ///< vertical scroll position of second pic at the moment of enabling overlap mode
 272     int                 nHSecondScrollPos;  ///< horizontal scroll position of second pic at the moment of enabling overlap mode
 273     POINT               ptPanStart;         ///< the point of the last mouse click
 274     int                 startVScrollPos;    ///< the vertical scroll position when panning starts
 275     int                 startHScrollPos;    ///< the horizontal scroll position when panning starts
 276     int                 startVSecondScrollPos;  ///< the vertical scroll position of the second pic when panning starts
 277     int                 startHSecondScrollPos;  ///< the horizontal scroll position of the second pic when panning starts
 278     // image frames/dimensions
 279     UINT                nDimensions;
 280     UINT                nCurrentDimension;
 281     UINT                nFrames;
 282     UINT                nCurrentFrame;
 283
 284     // controls
 285     HWND                hwndLeftBtn;
 286     HWND                hwndRightBtn;
 287     HWND                hwndPlayBtn;
 288     HWND                hwndSelectBtn;
 289     CNiceTrackbar       m_AlphaSlider;
 290     HWND                hwndAlphaToggleBtn;
 291     HICON               hLeft;
 292     HICON               hRight;
 293     HICON               hPlay;
 294     HICON               hStop;
 295     HICON               hAlphaToggle;
 296     bool                bPlaying;
 297     RECT                m_inforect;
 298
 299     // linked image sizes/positions
 300     long                m_linkedWidth;
 301     long                m_linkedHeight;
 302 };