// Purpose: Defines the AutoCaptureMechanism class
// Author: Utensil Candel (UtensilCandel@@gmail.com)
// RCS-ID: $Id$
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifndef AUTOCAP_H
-#define AUTOCAP_H
+#ifndef _AUTOCAPTURE_H_
+#define _AUTOCAPTURE_H_
-#include <wx/notebook.h>
-#include <wx/settings.h>
+#include "wx/beforestd.h"
#include <vector>
-#include <ctime>
+#include "wx/afterstd.h"
-// Global helper functions. to take screenshot for a rect region
-wxBitmap Capture(wxRect rect);
-wxBitmap Capture(int x, int y, int width, int height);
+#include "wx/gdicmn.h"
+class wxBitmap;
+class wxFlexGridSizer;
+class wxWindow;
+class wxNotebook;
+
+/**
+ GlobalAdjustFlags works with AutoCaptureMechanism's constructor, to
+ configure auto-adjustments of all controls.
+
+ They are used to make AutoCaptureMechanism more configurable and provide a
+ fallback to detect the bugs that the adjustments intended to avoid.
+
+ @see AdjustFlags
+*/
+enum GlobalAdjustFlags
+{
+ /**
+ This is the default. All adjustments instructed in
+ AutoCaptureMechanism::RegisterControl() will be performed.
+ */
+ AJ_NormalAll = 0,
+
+ /**
+ Disable region adjustment for all controls.
+ */
+ AJ_DisableRegionAdjust = 1 << 0,
+
+ /**
+ Enable region adjustment for all controls.
+
+ If AJ_DisableRegionAdjust and AJ_AlwaysRegionAdjust are both specified,
+ current implemetation will ignore AJ_DisableRegionAdjust.
+ */
+ AJ_AlwaysRegionAdjust = 1 << 1,
+
+ /**
+ Disable name adjustment for all controls.
+ */
+ AJ_DisableNameAdjust = 1 << 2,
+
+ /**
+ For all the "Drop-down Controls", e.g. wxChoice, do not prompt the user
+ about whether to capture their drop-down state, and always capture only
+ its non-drop-down state.
+ */
+ AJ_DisableDropdown = 1 << 3
+};
+
+/**
+ AdjustFlags works with AutoCaptureMechanism::RegisterControl() to specify
+ how to adjust the screenshot of the current control.
+
+ They are used to avoid bugs, look better or interact with user etc.
+
+ @see GlobalAdjustFlags
+*/
enum AdjustFlags
{
+ /**
+ This is the default. Perform no adjustment for this control.
+ */
AJ_Normal = 0,
+
+ /**
+ Perform region adjustment for this control.
+
+ On some platforms and for some controls, wxWindow::GetScreenRect() will
+ return a smaller or deflected region. In these cases, the screenshots
+ we get are incomplete. It's recommended for everyone to fix the
+ controls' code, yet this flag provides a workaround to get a guaranteed
+ correct region without using wxWindow::GetScreenRect().
+
+ This workaround ("label trick") is inspired by (or say stolen from)
+ Auria's work.
+ */
AJ_RegionAdjust = 1 << 0,
+
+ /**
+ This flag provides a way to capture the drop-down state of "Drop-down
+ Controls", e.g. wxChoice.
+
+ For all the "Drop-down Controls", prompt the user about whether to
+ capture their drop-down state, if the user chooses YES, he should drop
+ down the control in about 3 seconds and wait util it's captured in that
+ state.
+ */
AJ_Dropdown = 1 << 1,
+
+ /**
+ This flag is used internally by RegisterPageTurn(). Don't use it
+ directly unless you know what you are doing.
+ */
AJ_TurnPage = 1 << 2,
+
+ /**
+ This flag provides a functionality to union screenshots of different
+ modes/states of a control into one image. e.g. the single-line /
+ multi-line modes of a wxTextCtrl.
+
+ For a series of controls to be unioned, you should specify AJ_Union for
+ the first, and AJ_UnionEnd for the last. For the controls between them,
+ you can either specify AJ_Union or not.
+
+ The filename of the generated screenshot is the name of the first
+ control in the series.
+ */
AJ_Union = 1 << 3,
+
+ /**
+ @see AJ_Union.
+ */
AJ_UnionEnd = 1 << 4
};
+/**
+ @class AutoCaptureMechanism
+
+ AutoCaptureMechanism provides an easy-to-use and adjustable facility to
+ take the screenshots for all controls fully automaticly and correctly. It
+ also provides an advanced feature to union screenshots of different
+ states/modes of a control.
+
+ @section tag_filename_convention Screenshot File Name Convention
+
+ All screenshots are generated as PNG files. For a control named wxName, its
+ screenshot file name would be "name.png", e.g. "button.png" for wxButton.
+ This is the protocol with the doxygen document of wxWidgets.
+
+ By default, screenshots are generated under the subdirectory "screenshots"
+ of current working directory. During updating or adding new screenshots,
+ first make sure screenshots are generated correctly, and then copy them to
+ the "docs/doxygen/images" folder directly.
+
+ @section tag_gui_assumption The Assumption of GUI
+
+ Unfortunately, this class have an assumption about the structure of GUI: It
+ must have the follwoing top-down structure:
+
+ wxNotebook->wxPanel->wxSizer->wxControl
+
+ That means, in the wxNotebook associated with this class, controls that
+ needs to be taken screenshots are placed on different panels(for grouping)
+ and layed out by wxSizers.
+
+ @section tag_tutorial Tutorial
+
+ In the contruction, you should associate a wxNotebook with this class, in
+ that wxNotebook, controls that needs to be captured are placed on different
+ panels(for grouping).
+
+ When you register controls, you should do it in order: Register the
+ controls on the first panel(using RegisterControl()), and then register a
+ page turn(using RegisterPageTurn()), so this class can turn a page of the
+ wxNotebook to present the second page. And then you register the controls
+ on the second panel, then a page turn, and so on.
+
+ When you are done, simply call CaptureAll(), then screenshots of all
+ controls will be automaticly generated.
-// ----------------------------------------------------------------------------
-// class AutoCaptureMechanism
-// ----------------------------------------------------------------------------
+ @section tag_autoadjust Make Use of Auto Adjustments
+ First take a look at the document of RegisterControl(), enum AdjustFlags
+ and GlobalAdjustFlags.
+
+ And then, ScreenshotFrame::OnCaptureAllControls() is a good example of
+ making use of auto adjustment. Taking a look at it will get you started.
+
+ @section tag_developer_note Notes for Developers
+
+ @subsection tag_cnc CaptureAll() and Capture()
+
+ The implementation of Auto Adjustments is in CaptureAll() and Capture(),
+ the code is short, quite readable and well commented, please read the codes
+ before any modification.
+
+ If you need the class to do something sepcial for you, consider introducing
+ a new flag and implement it in them. For an operation performed on multiple
+ controls, implemente its logic in CaptureAll(), otherwise in the private
+ member Capture().
+
+ @subsection tag_yield_issue wxYield Issues
+
+ Not quite a good habit, but this class made a lot of use of wxYield() /
+ wxYieldIfNeeded(). They are used to ensure the update of GUI (e.g. the
+ page turn of wxNotebook) is done before any further screenshot-taking, or
+ to do the timing(in Delay()). Without their use, there would be subtle
+ bugs.
+
+ I've read documents about wxYield() and understand the down side of it
+ before using it. But I didn't find a better approach to do those things,
+ and I used them carefully. So please DO NOT remove any of these wxYield()s
+ unless you're sure that it won't cause problems on all of MS Windows
+ XP/Vista, Linux(Ubuntu/Fedora), Mac OS Tiger/Leopard. And please help me
+ to find a better approach, thank you :)
+*/
class AutoCaptureMechanism
{
public:
- AutoCaptureMechanism(wxNotebook * notebook,
- wxString directory = wxT("screenshots"),
- int border = 5)
- : m_notebook(notebook), m_dir(directory), m_border(border) {}
- ~AutoCaptureMechanism(){}
+ /**
+ Constructor.
- /*
- If wxRTTI can't get the name correctly, specify name;
- If wxWindow::GetScreenRect doesn't get the rect correctly, set flag to AJ_RegionAdjust
+ @param notebook
+ The wxNotebook associated with this class. Please see
+ @ref tag_gui_assumption and @ref tag_tutorial.
+ @param flag
+ It's one of or a combination of GlobalAdjustFlags, to disable /
+ enable some auto-adjustment for all controls.
+ @param margin
+ It's the margin around every control in the sreenshots.
*/
- void RegisterControl(wxWindow * ctrl, wxString name = wxT(""),
+ AutoCaptureMechanism(wxNotebook *notebook,
+ int flag = AJ_NormalAll,
+ int margin = 5);
+
+ ~AutoCaptureMechanism() { }
+
+ /**
+ Register a control and perform specifid auto adjustments.
+
+ @param ctrl
+ The pointer to the control to be taken a screenshot.
+ @param name
+ If you find out that the screenshot for this control was generated
+ under an incorrect file name, specify @a name. e.g. for wxButton,
+ "wxButton" or "button" are both OK.
+ @param flag
+ If you end up with an a smaller or deflected screenshot, use
+ AJ_RegionAdjust.
+
+ If you want to caputure the "drop-down" state of a "drop-down"
+ control, use AJ_Dropdown.
+
+ If you want to present different states of a control in one
+ screenshot, use AJ_Union and AJ_UnionEnd.
+
+ Please read the document of enum AdjustFlags, and notice that this
+ flag could be enabled / disabled by global flag GlobalAdjustFlags.
+ */
+ void RegisterControl(wxWindow* ctrl,
+ wxString name = wxT(""),
int flag = AJ_Normal)
{
m_controlList.push_back(Control(ctrl, name, flag));
}
- void RegisterControl(wxWindow * ctrl, int flag)
+ /**
+ Register a control and perform specifid auto adjustments.
+
+ This calls RegisterControl(wxWindow* ctrl, wxString name, int flag)
+ with an empty name. This is useful when you only want to auto-adjust
+ something other than name adjustment.
+ */
+ void RegisterControl(wxWindow* ctrl, int flag)
{
RegisterControl(ctrl, wxT(""), flag);
}
+ /**
+ Register a page turn.
+
+ When you finished registering the controls on a panel, remember to
+ call it to turn the wxNotebook to the next panel.
+ */
void RegisterPageTurn()
{
m_controlList.push_back(Control(0, wxT(""), AJ_TurnPage));
}
- void CaptureAll()
- {
- m_notebook->SetSelection(0);
- wxYield();
-
- for(ControlList::iterator it = m_controlList.begin();
- it != m_controlList.end();
- ++it)
- {
- Control & ctrl = *it;
-
- if(ctrl.flag == AJ_TurnPage) // Turn to next page
- {
- m_notebook->SetSelection(m_notebook->GetSelection() + 1);
- wxYield();
- continue;
- }
-
- wxBitmap screenshot = Capture(ctrl);
-
- if(ctrl.flag & AJ_Union)
- {
- screenshot = Union(screenshot, Capture(*(++it)));
- }
-
- Save(screenshot, ctrl.name);
- }
- }
+ /**
+ Capture all registered controls of the associated wxNotebook.
+ */
+ void CaptureAll();
+
+ /*
+ Static Members
+ */
+ /**
+ Take a screenshot for the given region.
+
+ @param bitmap
+ Bitmap to save the screenshot to.
+ @param rect
+ Given rectangular region.
+ @param delay
+ Only useful for Mac, for fixing a delay bug. It seems that it
+ didn't fix the bug, so it might be removed soon.
+ */
+ static bool Capture(wxBitmap* bitmap, wxRect rect, int delay = 0);
+
+ /**
+ Take a screenshot for the given region.
+
+ @see Capture(wxBitmap*,wxRect,int)
+ */
+ static bool Capture(wxBitmap* bitmap,
+ int x, int y, int width, int height,
+ int delay = 0);
+
+ /**
+ Save the screenshot as the name of @a fileName in the default
+ directory.
+
+ @a fileName should be without ".png".
+ */
+ static void Save(wxBitmap* screenshot, const wxString& fileName);
+
+ /**
+ Set the default directory where the screenshots will be generated.
+ */
+ static void SetDefaultDirectory(const wxString& dir) { default_dir = dir; }
+
+ /**
+ Get the default directory where the screenshots will be generated.
+ */
+ static wxString GetDefaultDirectory() { return default_dir; }
-protected: // internal utils
+ /**
+ Get the absolute path of the default directory where the screenshots
+ will be generated.
+ */
+ static wxString GetDefaultDirectoryAbsPath();
+
+private:
+
+ /*
+ Internal Data Structures
+
+ They might go public in future to provide reuse of ControlList.
+ */
struct Control
{
Control() {}
int flag;
};
- wxBitmap Capture(Control & ctrl);
+ typedef std::vector<Control> ControlList;
+
+ /*
+ Internal Functions
+
+ They are only used to clearify the logic of some public functions and
+ it's nonsense to call them elsewhere.
+ */
+
+ /*
+ Capture and auto adjust the control. Used by CaptureAll().
+ */
+ bool Capture(wxBitmap* bitmap, Control& ctrl);
- //if AJ_RegionAdjust is specified, the following line will use the label trick to adjust
- //the region position and size
+ /*
+ Get the correct rectangular region that the control occupies. Used by
+ Capture(Control & ctrl).
+
+ If AJ_RegionAdjust is specified, it will use the "label trick" to
+ perform region auto adjustment.
+
+ The "label trick" is to reattach the control to a wxFlexGridSizer
+ m_grid, surround the control with labels and get the control's region
+ by label's positions. Just like this:
+
+ +---------+-----------+---------+
+ | 0 | label | 1 |
+ +---------+-----------+---------+
+ | label | ctrl | label |
+ +---------+-----------+---------+
+ | 2 | label | 3 |
+ +---------+-----------+---------+
+
+ So, there will be a side effect: the control is moved to a new
+ position. So after taking the screenshot, Capture(Control & ctrl)
+ should call PutBack(wxWindow * ctrl) to put it back.
+
+ If AJ_RegionAdjust isn't specified, it will simply call
+ wxWindow::GetScreenRect().
+ */
wxRect GetRect(wxWindow* ctrl, int flag);
- //put the control back after the label trick(Using reparent/resizer approach)
+ /*
+ Put the control back after the label trick used in GetRect(). Used by
+ Capture(Control & ctrl).
+ */
void PutBack(wxWindow * ctrl);
- wxBitmap Union(wxBitmap pic1, wxBitmap pic2);
+ /*
+ Union two screenshots in the vertical direction, and leave a gap
+ between the screenshots. Used by CaptureAll().
- void Save(wxBitmap screenshot, wxString fileName);
+ The gap is 20 pixels by default. Currently it isn't configurable.
+ */
+ static bool Union(wxBitmap* top, wxBitmap* bottom, wxBitmap* result);
-private:
- typedef std::vector<Control> ControlList;
+ /*
+ Delay a few seconds without blocking GUI.
+ */
+ static void Delay(int seconds);
+
+ /*
+ Data Members
+ */
ControlList m_controlList;
- // here we introduce the dependency on wxNotebook.
- // The assumption of this whole class is that the gui has the following top-down structure
- // wxNotebook wxPanel wxSizer wxControls
wxNotebook* m_notebook;
- wxFlexGridSizer* m_grid;
+ int m_flag;
- wxString m_dir;
- int m_border;
-};
+ int m_margin;
-#endif // AUTOCAP_H
+ wxFlexGridSizer* m_grid;
+ static wxString default_dir;
+};
+#endif // _AUTOCAPTURE_H_
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