274 lines
12 KiB
D
274 lines
12 KiB
D
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/* MinWin Canvas class
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*
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* A Canvas is a component that fires key and mouse events and has no
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* other builtin capabilities
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*
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* Written by Ben Hinkle and released to the public domain, as
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* explained at http://creativecommons.org/licenses/publicdomain
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* Report comments and bugs at dsource: http://www.dsource.org/projects/minwin
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*/
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module minwin.canvas;
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private {
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import minwin.component;
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import minwin.event;
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import minwin.app;
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import minwin.paint;
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import minwin.logging;
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import minwin.window;
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import minwin.peerimpl;
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import minwin.image;
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import std.string;
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}
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template SharedCanvasImpl() {
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// events
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MultiDelegate!(Component,KeyEvent*) keyDelegate;
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MultiDelegate!(Component,MouseEvent*) mouseDelegate;
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MultiDelegate!(Component,GContext) paintDelegate;
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}
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version (MinWin32) {
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private import minwin.mswindows;
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// generic heavyweight window child
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class Canvas : WindowChild {
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this(Component parent, char[] name = "") {
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PeerForAdd parentp = parent.getPeerForAdd();
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peer = CreateWindowA("MinWinCanvas","",
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WS_CHILD | WS_VISIBLE,
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0,0,10,10,parentp,
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cast(HMENU)0,gApp.hInstance,null);
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sysAssert(peer !is null, "Failed to create peer Canvas");
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this.name = name;
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version(LOG)log.printf("canvas ctor %x peer %x\n",this,peer);
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setWindowChildPeer(this,peer,OWNS_PEER);
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parent.addChild(this);
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}
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mixin SharedCanvasImpl!();
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mixin WindowChildImpl!();
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Point preferredSize(){
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int width = 60;
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int height = 60;
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if (userPreferredWidth > 0)
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width = userPreferredWidth;
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if (userPreferredHeight > 0)
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height = userPreferredHeight;
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return XY(width,height);
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}
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void backgroundColor(Color c) {
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// TODO
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}
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mixin CommonEventSourceImpl!();
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int WindowProc(HWND hWnd, uint uMsg, WPARAM wParam, LPARAM lParam) {
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version (LOG) log.printf(" in canvas windowproc msg %d\n",uMsg);
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bool doDefault = true;
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if (uMsg <= WM_KEYLAST && uMsg >= WM_KEYFIRST) {
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version(LOG) log.writefln("got canvas key event %d %d",uMsg,wParam);
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keyDelegate(this, cast(KeyEvent*)&gApp.event);
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} else if (uMsg <= WM_MOUSELAST && uMsg >= WM_MOUSEFIRST) {
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MouseEvent ev;
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mouseDelegate(this, cast(MouseEvent*)&gApp.event);
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} else {
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switch (uMsg) {
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case WM_PAINT:
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version (LOG) log.writefln(" got canvas paint");
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repaintNow();
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break;
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case WM_DESTROY:
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version (LOG) log.writefln(" got canvas destroy");
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hasPeer = NO_PEER;
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default:
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version (LOG) log.writefln(" got canvas default");
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break;
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}
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}
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return doDefault;
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}
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}
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extern(Windows) int MinWinCanvasProc(HWND hWnd, uint uMsg, WPARAM wParam, LPARAM lParam) {
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version(LOG) log.printf("in minwin canvas proc hwnd %p\n",hWnd);
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bool doDefault = true;
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Canvas canvas = cast(Canvas)peerToWindowChild(hWnd);
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version(LOG) log.printf("in minwin canvas proc canvas %p\n",canvas);
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if (canvas !is null)
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doDefault = canvas.WindowProc(hWnd,uMsg,wParam,lParam) != 0;
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if (doDefault)
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return DefWindowProcA(hWnd, uMsg, wParam, lParam);
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else
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return 0;
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}
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static this() {
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HINSTANCE hInst = GetModuleHandleA(null);
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WNDCLASSA wc;
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wc.lpszClassName = "MinWinCanvas";
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wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
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wc.lpfnWndProc = &MinWinCanvasProc;
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wc.hInstance = hInst;
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wc.hCursor = LoadCursorA(cast(HINSTANCE) null, IDC_ARROW);
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wc.hbrBackground = null;
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// wc.hbrBackground = cast(HBRUSH) (COLOR_WINDOW + 1); // not +1 for default
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wc.lpszMenuName = null;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = 0;
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RegisterClassA(&wc);
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}
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} else version (GTK) {
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private import minwin.gtk;
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class Canvas : WindowChild {
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this(Component parent, char[] name = "") {
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PeerForAdd parentp = parent.getPeerForAdd();
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this.name = name;
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peer = gtk_drawing_area_new();
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gtk_widget_add_events(peer,GdkEventMask.GDK_KEY_PRESS_MASK |
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GdkEventMask.GDK_KEY_RELEASE_MASK |
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GdkEventMask.GDK_EXPOSURE_MASK |
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GdkEventMask.GDK_POINTER_MOTION_MASK |
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GdkEventMask.GDK_BUTTON_PRESS_MASK |
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GdkEventMask.GDK_BUTTON_RELEASE_MASK);
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g_signal_connect_data(peer,"expose-event",
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cast(GCallback)&mw_canvas_expose_callback,
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cast(gpointer)this,
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null,GConnectFlags.G_CONNECT_AFTER);
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g_signal_connect_data(peer,"key-press-event",
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cast(GCallback)&mw_canvas_key_callback,
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cast(gpointer)this,
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null,GConnectFlags.G_CONNECT_AFTER);
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g_signal_connect_data(peer,"key-release-event",
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cast(GCallback)&mw_canvas_key_callback,
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cast(gpointer)this,
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null,GConnectFlags.G_CONNECT_AFTER);
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g_signal_connect_data(peer,"motion-notify-event",
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cast(GCallback)&mw_can_mouse_callback,
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cast(gpointer)this,
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null,GConnectFlags.G_CONNECT_AFTER);
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g_signal_connect_data(peer,"button-press-event",
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cast(GCallback)&mw_can_button_callback,
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cast(gpointer)this,
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null,GConnectFlags.G_CONNECT_AFTER);
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g_signal_connect_data(peer,"button-release-event",
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cast(GCallback)&mw_can_button_callback,
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cast(gpointer)this,
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null,GConnectFlags.G_CONNECT_AFTER);
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GtkObject* obj = cast(GtkObject*)peer;
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obj.flags |= GtkWidgetFlags.GTK_CAN_FOCUS;
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gtk_container_add(cast(GtkContainer*)parentp,peer);
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setWindowChildPeer(this,peer,OWNS_PEER);
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parent.addChild(this);
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gtk_widget_realize(peer);
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visible = true;
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}
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mixin CommonEventSourceImpl!();
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void backgroundColor(Color c) {
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GdkWindow* win = (cast(GtkWidget*)peer).window;
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GdkColor nc;
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// look up GdkColor for rgb values in c using rgb colormap
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gdk_window_set_background(win,&nc);
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}
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GContext getGContext(Event* paintEvent) {
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GContext gc = newGContext();
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// GtkWidget* widget = cast(GtkWidget*)peer;
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GdkWindow* gwin = peer.window;
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sysAssert(gwin !is null,"Canvas peer has no window",0);
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// version(LOG) log.printf(" CANVAS DRAWABLE is %x\n",gwin);
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gc.drawable = cast(GdkDrawable*)gwin;
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gc.layout = gtk_widget_create_pango_layout(peer,"");
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gc.peer = gdk_gc_new(gc.drawable);
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gc.hasPeer = OWNS_PEER;
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gc.paintEvent = cast(GdkEventExpose*)paintEvent;
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return gc;
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}
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// share with Window modulo peer vs content
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Image getCompatibleImage(int width, int height) {
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GtkWidget* widget = peer;
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GdkDrawable* gwin = cast(GdkDrawable*)widget.window;
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// ImagePeer bm = gdk_pixbuf_new(GdkColorspace.GDK_COLORSPACE_RGB,
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// false,8,width,height);
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int depth = gdk_drawable_get_depth(gwin);
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ImagePeer bm = gdk_pixmap_new(gwin,width,height,depth);
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version(LOG) log.writefln("create bitmap %x",cast(int)bm);
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Image res = new Image(bm);
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res.width = width;
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res.height = height;
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res.hasPeer = OWNS_PEER;
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return res;
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}
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// share with Window modulo peer vs content
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Image loadCompatibleImage(char[] imageKey, char[] fmt = "bmp") {
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GtkWidget* widget = peer;
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GdkDrawable* gwin = cast(GdkDrawable*)widget.window;
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GError* err;
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char[] fname = imageKey;
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if (gApp.resourcePath.length > 0) {
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fname = gApp.resourcePath ~ "/" ~ fname;
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}
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fname = fname ~ "." ~ fmt;
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GdkPixbuf* pbuf = gdk_pixbuf_new_from_file(toStringz(fname),&err);
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int width = gdk_pixbuf_get_width(pbuf);
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int height = gdk_pixbuf_get_height(pbuf);
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int depth = gdk_drawable_get_depth(gwin);
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GdkColormap* cmap = gdk_drawable_get_colormap(gwin);
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ImagePeer bm = gdk_pixmap_new(gwin,width,height,depth);
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gdk_pixbuf_render_pixmap_and_mask_for_colormap(pbuf,cmap,&bm,null,0);
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Image res = new Image(bm);
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res.width = width;
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res.height = height;
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res.hasPeer = OWNS_PEER;
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return res;
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}
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mixin SharedCanvasImpl!();
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mixin WindowChildImpl!();
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}
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extern (C) gboolean mw_canvas_expose_callback(GtkWidget* w,
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GdkEventExpose* event,
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gpointer ud) {
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Canvas c = cast(Canvas) ud;
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if (c) {
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c.repaintNow(cast(Event*)event);
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}
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return false;
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}
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extern (C) gboolean mw_canvas_key_callback(GtkWidget* w,
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GdkEventKey* event,
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gpointer ud) {
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Canvas c = cast(Canvas) ud;
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if (c && !c.keyDelegate.isEmpty) {
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c.keyDelegate(c,cast(KeyEvent*)event);
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}
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return false;
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}
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extern (C) gboolean mw_can_mouse_callback(GtkWidget* w,
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GdkEventMotion* event,
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gpointer ud) {
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Canvas c = cast(Canvas) ud;
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if (c && !c.mouseDelegate.isEmpty) {
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// TODO this should be made into a GdkEventButton
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c.mouseDelegate(c,cast(MouseEvent*)event);
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}
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return false;
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}
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extern (C) gboolean mw_can_button_callback(GtkWidget* w,
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GdkEventButton* event,
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gpointer ud) {
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Canvas c = cast(Canvas) ud;
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if (c && !c.mouseDelegate.isEmpty) {
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// TODO this should be made into a GdkEventButton
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c.mouseDelegate(c,cast(MouseEvent*)event);
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}
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return false;
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}
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}
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