Wrote a small application to show the power status in a window, replicant, or the

Deskbar tray. Currently only works under BeOS, and has rather ugly graphics; Haiku
doesn't have an APM kernel interface yet, and I was too lazy to make any nice
icons/drawings :)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19145 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/Jamfile

@@ -19,6 +19,7 @@ SubInclude HAIKU_TOP src apps mediaplayer ;
 SubInclude HAIKU_TOP src apps midiplayer ;
 SubInclude HAIKU_TOP src apps people ;
 SubInclude HAIKU_TOP src apps poorman ;
+SubInclude HAIKU_TOP src apps powerstatus ;
 SubInclude HAIKU_TOP src apps processcontroller ;
 SubInclude HAIKU_TOP src apps pulse ;
 SubInclude HAIKU_TOP src apps showimage ;

src/apps/powerstatus/Jamfile

@@ -0,0 +1,13 @@
+SubDir HAIKU_TOP src apps powerstatus ;
+
+SetSubDirSupportedPlatformsBeOSCompatible ;
+
+UsePrivateHeaders shared ;
+
+Application PowerStatus :
+	PowerStatusWindow.cpp
+	PowerStatusView.cpp
+	PowerStatus.cpp
+	: be
+	: PowerStatus.rdef
+	;

src/apps/powerstatus/PowerStatus.cpp

@@ -0,0 +1,135 @@
+/*
+ * Copyright 2006, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Axel Dörfler, axeld@pinc-software.de
+ */
+
+
+#include "PowerStatus.h"
+#include "PowerStatusWindow.h"
+
+#include <Alert.h>
+#include <Application.h>
+#include <Deskbar.h>
+#include <Entry.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+class PowerStatus : public BApplication {
+	public:
+		PowerStatus();
+		virtual	~PowerStatus();
+
+		virtual	void	ReadyToRun();
+		virtual void	AboutRequested();
+};
+
+
+const char* kSignature = "application/x-vnd.Haiku-PowerStatus";
+const char* kDeskbarSignature = "application/x-vnd.Be-TSKB";
+const char* kDeskbarItemName = "PowerStatus";
+
+
+status_t
+our_image(image_info& image)
+{
+	int32 cookie = 0;
+	while (get_next_image_info(B_CURRENT_TEAM, &cookie, &image) == B_OK) {
+		if ((char *)our_image >= (char *)image.text
+			&& (char *)our_image <= (char *)image.text + image.text_size)
+			return B_OK;
+	}
+
+	return B_ERROR;
+}
+
+
+//	#pragma mark -
+
+
+PowerStatus::PowerStatus()
+	: BApplication(kSignature)
+{
+}
+
+
+PowerStatus::~PowerStatus()
+{
+}
+
+
+void
+PowerStatus::ReadyToRun()
+{
+	bool isInstalled = false;
+	bool isDeskbarRunning = true;
+
+	{
+		// if the Deskbar is not alive at this point, it might be after having
+		// acknowledged the requester below
+		BDeskbar deskbar;
+#ifdef HAIKU_TARGET_PLATFORM_HAIKU
+		isDeskbarRunning = deskbar.IsRunning())
+#endif
+		isInstalled = deskbar.HasItem(kDeskbarItemName);
+	}
+
+	if (isDeskbarRunning && !isInstalled) {
+		BAlert* alert = new BAlert("", "Do you want PowerStatus to live in the Deskbar?",
+			"Don't", "Install", NULL, B_WIDTH_AS_USUAL, B_WARNING_ALERT);
+		alert->SetShortcut(0, B_ESCAPE);
+
+		if (alert->Go()) {
+			image_info info;
+			entry_ref ref;
+		
+			if (our_image(info) == B_OK
+				&& get_ref_for_path(info.name, &ref) == B_OK) {
+				BDeskbar deskbar;
+				deskbar.AddItem(&ref);
+			}
+
+			Quit();
+			return;
+		}
+	}
+
+	BWindow* window = new PowerStatusWindow();
+	window->Show();
+}
+
+
+void
+PowerStatus::AboutRequested()
+{
+	BWindow* window = WindowAt(0);
+	if (window == NULL)
+		return;
+
+	BView* view = window->FindView(kDeskbarItemName);
+	if (view == NULL)
+		return;
+
+	BMessenger target((BHandler*)view);
+	BMessage about(B_ABOUT_REQUESTED);
+	target.SendMessage(&about);
+}
+
+
+//	#pragma mark -
+
+
+int
+main(int, char**)
+{
+	PowerStatus app;
+	app.Run();
+
+	return 0;
+}
+

src/apps/powerstatus/PowerStatus.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2006, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Axel Dörfler, axeld@pinc-software.de
+ */
+#ifndef POWER_STATUS_H
+#define POWER_STATUS_H
+
+
+extern const char* kSignature;
+extern const char* kDeskbarItemName;
+
+#endif	// POWER_STATUS_H

src/apps/powerstatus/PowerStatus.rdef

@@ -0,0 +1,17 @@
+
+resource(1, "BEOS:APP_SIG") #'MIMS' "application/x-vnd.Haiku-PowerStatus";
+
+resource app_flags B_SINGLE_LAUNCH;
+
+resource app_version {
+	major  = 1,
+	middle = 0,
+	minor  = 0,
+
+	variety = B_APPV_DEVELOPMENT,
+	internal = 0,
+
+	short_info = "PowerStatus",
+	long_info = "PowerStatus ©2006 Haiku"
+};
+

src/apps/powerstatus/PowerStatusView.cpp

@@ -0,0 +1,475 @@
+/*
+ * Copyright 2006, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Axel Dörfler, axeld@pinc-software.de
+ */
+
+
+#include "PowerStatusView.h"
+#include "PowerStatus.h"
+
+#include <Alert.h>
+#include <Application.h>
+#include <Deskbar.h>
+#include <Dragger.h>
+#include <Drivers.h>
+#include <MenuItem.h>
+#include <MessageRunner.h>
+#include <PopUpMenu.h>
+#include <TextView.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+extern "C" _EXPORT BView *instantiate_deskbar_item(void);
+
+
+const uint32 kMsgUpdate = 'updt';
+const uint32 kMsgToggleLabel = 'tglb';
+const uint32 kMsgToggleTime = 'tgtm';
+const uint32 kMsgToggleStatusIcon = 'tgsi';
+
+const uint32 kMinIconWidth = 16;
+const uint32 kMinIconHeight = 16;
+
+const bigtime_t kUpdateInterval = 1000000;
+		// every second
+
+
+#ifndef HAIKU_TARGET_PLATFORM_HAIKU
+// definitions for the APM driver available for BeOS
+enum {
+	APM_CONTROL = B_DEVICE_OP_CODES_END + 1,
+	APM_DUMP_POWER_STATUS,
+	APM_BIOS_CALL,
+	APM_SET_SAFETY
+};
+
+#define BIOS_APM_GET_POWER_STATUS 0x530a
+#endif
+
+
+PowerStatusView::PowerStatusView(BRect frame, int32 resizingMode, bool inDeskbar)
+	: BView(frame, kDeskbarItemName, resizingMode,
+		B_WILL_DRAW | B_FULL_UPDATE_ON_RESIZE),
+	fInDeskbar(inDeskbar)
+{
+	_Init();
+
+	if (!inDeskbar) {
+		// we were obviously added to a standard window - let's add a dragger
+		frame.OffsetTo(B_ORIGIN);
+		frame.top = frame.bottom - 7;
+		frame.left = frame.right - 7;
+		BDragger* dragger = new BDragger(frame, this,
+			B_FOLLOW_RIGHT | B_FOLLOW_BOTTOM);
+		AddChild(dragger);
+	} else
+		_Update();
+}
+
+
+PowerStatusView::PowerStatusView(BMessage* archive)
+	: BView(archive)
+{
+	_Init();
+
+	bool value;
+	if (archive->FindBool("show label", &value) == B_OK)
+		fShowLabel = value;
+	if (archive->FindBool("show icon", &value) == B_OK)
+		fShowStatusIcon = value;
+	if (archive->FindBool("show time", &value) == B_OK)
+		fShowTime = value;
+}
+
+
+PowerStatusView::~PowerStatusView()
+{
+#ifndef HAIKU_TARGET_PLATFORM_HAIKU
+	close(fDevice);
+#endif
+}
+
+
+void
+PowerStatusView::_Init()
+{
+	fShowLabel = true;
+	fShowTime = false;
+	fShowStatusIcon = true;
+
+	fMessageRunner = NULL;
+	fPercent = -1;
+	fOnline = true;
+	fTimeLeft = 0;
+
+#ifdef HAIKU_TARGET_PLATFORM_HAIKU
+	// TODO: implement me
+#else
+	fDevice = open("/dev/misc/apm", O_RDONLY);
+	if (fDevice < 0) {
+		fprintf(stderr, "No power interface found.\n");
+		_Quit();
+	}
+#endif
+}
+
+
+void
+PowerStatusView::_Quit()
+{
+	if (fInDeskbar) {
+		BDeskbar deskbar;
+		deskbar.RemoveItem(kDeskbarItemName);
+	} else
+		be_app->PostMessage(B_QUIT_REQUESTED);
+}
+
+
+PowerStatusView *
+PowerStatusView::Instantiate(BMessage* archive)
+{
+	if (!validate_instantiation(archive, "PowerStatusView"))
+		return NULL;
+
+	return new PowerStatusView(archive);
+}
+
+
+status_t
+PowerStatusView::Archive(BMessage* archive, bool deep) const
+{
+	status_t status = BView::Archive(archive, deep);
+	if (status == B_OK)
+		status = archive->AddString("add_on", kSignature);
+	if (status == B_OK)
+		status = archive->AddString("class", "PowerStatusView");
+	if (status == B_OK)
+		status = archive->AddBool("show label", fShowLabel);
+	if (status == B_OK)
+		status = archive->AddBool("show icon", fShowStatusIcon);
+	if (status == B_OK)
+		status = archive->AddBool("show time", fShowTime);
+
+	return status;
+}
+
+
+void
+PowerStatusView::AttachedToWindow()
+{
+	BView::AttachedToWindow();
+	if (Parent())
+		SetViewColor(Parent()->ViewColor());
+	else
+		SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));
+
+	SetLowColor(ViewColor());
+
+	BMessage update(kMsgUpdate);
+	fMessageRunner = new BMessageRunner(this, &update, kUpdateInterval);
+
+	_Update();
+}
+
+
+void
+PowerStatusView::DetachedFromWindow()
+{
+	delete fMessageRunner;
+}
+
+
+void
+PowerStatusView::MessageReceived(BMessage *message)
+{
+	switch (message->what) {
+		case kMsgUpdate:
+			_Update();
+			break;
+
+		case kMsgToggleLabel:
+			fShowLabel = !fShowLabel;
+			_Update(true);
+			break;
+
+		case kMsgToggleTime:
+			fShowTime = !fShowTime;
+			_Update(true);
+			break;
+
+		case kMsgToggleStatusIcon:
+			fShowStatusIcon = !fShowStatusIcon;
+			_Update(true);
+			break;
+
+		case B_ABOUT_REQUESTED:
+			_AboutRequested();
+			break;
+
+		case B_QUIT_REQUESTED:
+			_Quit();
+			break;
+
+		default:
+			BView::MessageReceived(message);
+	}
+}
+
+
+void
+PowerStatusView::_DrawBattery(BRect rect)
+{
+	float quarter = floorf((rect.Height() + 1) / 4);
+	rect.top += quarter;
+	rect.bottom -= quarter;
+
+	rect.InsetBy(2, 0);
+
+	float left = rect.left;
+	rect.left += rect.Width() / 11;
+
+	float gap = 1;
+	if (rect.Height() > 8) {
+		rect.InsetBy(1, 1);
+		SetPenSize(2);
+		gap = 2;
+	}
+
+	if (fOnline)
+		SetHighColor(92, 92, 92);
+
+	StrokeRect(rect);
+
+	SetPenSize(1);
+	FillRect(BRect(left, floorf(rect.top + rect.Height() / 4) + 1,
+		rect.left, floorf(rect.bottom - rect.Height() / 4)));
+
+	int32 percent = fPercent;
+	if (percent > 100 || percent < 0)
+		percent = 100;
+
+	if (percent > 0) {
+		if (percent < 16)
+			SetHighColor(180, 0, 0);
+
+		rect.InsetBy(gap + 1, gap + 1);
+		if (gap > 1) {
+			rect.right++;
+			rect.bottom++;
+		}
+
+		rect.right = rect.left + rect.Width() * min_c(percent, 100) / 100.0;
+		FillRect(rect);
+	}
+
+	SetHighColor(0, 0, 0);
+}
+
+
+void
+PowerStatusView::Draw(BRect updateRect)
+{
+	float aspect = Bounds().Width() / Bounds().Height();
+	bool below = aspect <= 1.0f;
+
+	font_height fontHeight;
+	GetFontHeight(&fontHeight);
+	float baseLine = ceilf(fontHeight.ascent);
+
+	char text[64];
+	_SetLabel(text, sizeof(text));
+
+	float textHeight = ceilf(fontHeight.descent + fontHeight.ascent);
+	float textWidth = StringWidth(text);
+	bool showLabel = fShowLabel && text[0];
+
+	BRect iconRect;
+
+	if (fShowStatusIcon) {
+		iconRect = Bounds();
+		if (showLabel) {
+			if (below)
+				iconRect.bottom -= textHeight + 4;
+			else
+				iconRect.right -= textWidth + 4;
+		}
+
+		// make a square
+		iconRect.bottom = min_c(iconRect.bottom, iconRect.right);
+		iconRect.right = iconRect.bottom;
+
+		if (iconRect.Width() + 1 >= kMinIconWidth
+			&& iconRect.Height() + 1 >= kMinIconHeight) {
+			// TODO: have real icons
+			//if (!fOnline)
+				_DrawBattery(iconRect);
+			//else
+			//	FillRect(iconRect);
+		} else {
+			// there is not enough space for the icon
+			iconRect.Set(0, 0, -1, -1);
+		}
+	}
+
+	if (showLabel) {
+		BPoint point(0, baseLine);
+
+		if (iconRect.IsValid()) {
+			if (below) {
+				point.x = (iconRect.Width() - textWidth) / 2;
+				point.y += iconRect.Height() + 2;
+			} else {
+				point.x = iconRect.Width() + 2;
+				point.y += (iconRect.Height() - textHeight) / 2;
+			}
+		} else {
+			point.x = (Bounds().Width() - textWidth) / 2;
+			point.y += (Bounds().Height() - textHeight) / 2;
+		}
+
+		DrawString(text, point);
+	}
+}
+
+
+void
+PowerStatusView::MouseDown(BPoint point)
+{
+	BPopUpMenu *menu = new BPopUpMenu(B_EMPTY_STRING, false, false);
+	menu->SetFont(be_plain_font);
+
+	BMenuItem* item;
+	menu->AddItem(item = new BMenuItem("Show Text Label", new BMessage(kMsgToggleLabel)));
+	if (fShowLabel)
+		item->SetMarked(true);
+	menu->AddItem(item = new BMenuItem("Show Status Icon",
+		new BMessage(kMsgToggleStatusIcon)));
+	if (fShowStatusIcon)
+		item->SetMarked(true);
+	menu->AddItem(new BMenuItem(!fShowTime ? "Show Time" : "Show Percent",
+		new BMessage(kMsgToggleTime)));
+
+	menu->AddSeparatorItem();
+	menu->AddItem(new BMenuItem("About" B_UTF8_ELLIPSIS, new BMessage(B_ABOUT_REQUESTED)));
+	menu->AddItem(new BMenuItem("Quit", new BMessage(B_QUIT_REQUESTED)));
+	menu->SetTargetForItems(this);
+
+	ConvertToScreen(&point);
+	menu->Go(point, true, false, true);
+}
+
+
+void
+PowerStatusView::_AboutRequested()
+{
+	BAlert *alert = new BAlert("about", "PowerStatus\n"
+		"\twritten by Axel Dörfler\n"
+		"\tCopyright 2006, Haiku, Inc.\n", "Ok");
+	BTextView *view = alert->TextView();
+	BFont font;
+
+	view->SetStylable(true);
+
+	view->GetFont(&font);
+	font.SetSize(18);
+	font.SetFace(B_BOLD_FACE);
+	view->SetFontAndColor(0, 11, &font);
+
+	alert->Go();
+}
+
+
+void
+PowerStatusView::_SetLabel(char* buffer, size_t bufferLength)
+{
+	if (bufferLength < 1)
+		return;
+
+	buffer[0] = '\0';
+
+	if (!fShowLabel)
+		return;
+
+	const char* open = "";
+	const char* close = "";
+	if (fOnline) {
+		open = "(";
+		close = ")";
+	}
+
+	if (!fShowTime && fPercent >= 0)
+		snprintf(buffer, bufferLength, "%s%ld%%%s", open, fPercent, close);
+	else if (fShowTime && fTimeLeft >= 0) {
+		snprintf(buffer, bufferLength, "%s%ld:%ld%s",
+			open, fTimeLeft / 3600, fTimeLeft / 60, close);
+	}
+}
+
+
+void
+PowerStatusView::_Update(bool force)
+{
+#ifdef HAIKU_TARGET_PLATFORM_HAIKU
+	// TODO: retrieve data from APM/ACPI kernel interface
+	fPercent = 42;
+	fTimeLeft = 1500;
+	fOnline = true;
+#else
+	if (fDevice < 0)
+		return;
+
+	uint16 regs[6] = {0, 0, 0, 0, 0, 0};
+	regs[0] = BIOS_APM_GET_POWER_STATUS;
+	regs[1] = 0x1;
+	if (ioctl(fDevice, APM_BIOS_CALL, regs) == 0) {
+		fOnline = (regs[1] >> 8) != 0 && (regs[1] >> 8) != 2;
+		fPercent = regs[2] & 255;
+		if (fPercent > 100)
+			fPercent = -1;
+		fTimeLeft = fPercent >= 0 ? regs[3] : -1;
+		if (fTimeLeft > 0xffff)
+			fTimeLeft = -1;
+	}
+#endif
+
+	if (fInDeskbar) {
+		// make sure the tray icon is large enough
+		float width = fShowStatusIcon ? kMinIconWidth + 2 : 0;
+
+		if (fShowLabel) {
+			char text[64];
+			_SetLabel(text, sizeof(text));
+
+			if (text[0])
+				width += ceilf(StringWidth(text)) + 4;
+		}
+		if (width == 0) {
+			// make sure we're not going away completely
+			width = 8;
+		}
+
+		if (width != Bounds().Width())
+			ResizeTo(width, Bounds().Height());
+	}
+
+	if (force)
+		Invalidate();
+}
+
+
+//	#pragma mark -
+
+
+extern "C" _EXPORT BView *
+instantiate_deskbar_item(void)
+{
+	return new PowerStatusView(BRect(0, 0, 15, 15), B_FOLLOW_NONE, true);
+}
+

src/apps/powerstatus/PowerStatusView.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2006, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Axel Dörfler, axeld@pinc-software.de
+ */
+#ifndef POWER_STATUS_VIEW_H
+#define POWER_STATUS_VIEW_H
+
+
+#include <View.h>
+
+class BMessageRunner;
+
+
+class PowerStatusView : public BView {
+	public:
+		PowerStatusView(BRect frame, int32 resizingMode, bool inDeskbar = false);
+		PowerStatusView(BMessage* archive);
+		virtual	~PowerStatusView();
+
+		static	PowerStatusView* Instantiate(BMessage* archive);
+		virtual	status_t Archive(BMessage* archive, bool deep = true) const;
+
+		virtual	void	AttachedToWindow();
+		virtual	void	DetachedFromWindow();
+
+		virtual	void	MessageReceived(BMessage* message);
+		virtual	void	MouseDown(BPoint where);
+		virtual	void	Draw(BRect updateRect);
+
+	private:
+		void			_AboutRequested();
+		void			_Quit();
+		void			_Init();
+		void			_SetLabel(char* buffer, size_t bufferLength);
+		void			_Update(bool force = false);
+		void			_DrawBattery(BRect rect);
+
+		BMessageRunner*	fMessageRunner;
+		bool			fInDeskbar;
+		bool			fShowLabel;
+		bool			fShowTime;
+		bool			fShowStatusIcon;
+
+		int32			fPercent;
+		time_t			fTimeLeft;
+		bool			fOnline;
+
+#ifndef HAIKU_TARGET_PLATFORM_HAIKU
+		int				fDevice;
+#endif
+};
+
+#endif	// POWER_STATUS_VIEW_H

src/apps/powerstatus/PowerStatusWindow.cpp

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2006, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Axel Dörfler, axeld@pinc-software.de
+ */
+
+
+#include "PowerStatusWindow.h"
+#include "PowerStatusView.h"
+
+#include <Application.h>
+
+
+PowerStatusWindow::PowerStatusWindow()
+	: BWindow(BRect(100, 150, 147, 197), "PowerStatus", B_TITLED_WINDOW,
+		B_NOT_ZOOMABLE | B_ASYNCHRONOUS_CONTROLS)
+{
+	BView* topView = new BView(Bounds(), NULL, B_FOLLOW_ALL, B_WILL_DRAW);
+	topView->SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));
+	AddChild(topView);
+
+	topView->AddChild(new PowerStatusView(Bounds(), B_FOLLOW_ALL));
+}
+
+
+PowerStatusWindow::~PowerStatusWindow()
+{
+}
+
+
+bool
+PowerStatusWindow::QuitRequested()
+{
+	be_app->PostMessage(B_QUIT_REQUESTED);
+	return true;
+}

src/apps/powerstatus/PowerStatusWindow.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2006, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Axel Dörfler, axeld@pinc-software.de
+ */
+#ifndef POWER_STATUS_WINDOW_H
+#define POWER_STATUS_WINDOW_H
+
+
+#include <Window.h>
+
+
+class PowerStatusWindow : public BWindow {
+	public:
+		PowerStatusWindow();
+		virtual ~PowerStatusWindow();
+
+		virtual bool QuitRequested();
+};
+
+#endif	// POWER_STATUS_WINDOW_H