Rudimentary touchscreen support

[libs/gltk.git] / source / root.cpp

diff --git a/source/root.cpp b/source/root.cpp
index de2472797199108870d8b045679d53019ad815a8..a90ea5a23d9eec4a3b3bacc34b94fb1a912b8b4c 100644 (file)
--- a/source/root.cpp
+++ b/source/root.cpp
@@ -1,4 +1,7 @@
 #include <msp/gl/blend.h>
+#include <msp/gl/extensions/arb_shader_objects.h>
+#include <msp/gl/programbuilder.h>
+#include <msp/gl/uniform.h>
 #include <msp/input/keys.h>
 #include <msp/time/units.h>
 #include <msp/time/utils.h>
@@ -13,15 +16,17 @@ Root::Root(const Resources &r, Graphics::Window &window):
        resources(r),
        keyboard(new Input::Keyboard(window)),
        mouse(new Input::Mouse(window)),
+       touchscreen(0),
        own_input(true)
 {
        init(&window);
 }
 
-Root::Root(const Resources &r, Graphics::Window *window, Input::Keyboard *k, Input::Mouse *m):
+Root::Root(const Resources &r, Graphics::Window *window, Input::Keyboard *k, Input::Mouse *m, Input::Touchscreen *t):
        resources(r),
        keyboard(k),
        mouse(m),
+       touchscreen(t),
        own_input(false)
 {
        init(window);
@@ -35,6 +40,21 @@ void Root::init(Graphics::Window *window)
        lbl_tooltip = 0;
        tooltip_target = 0;
 
+       camera.set_orthographic(geom.w, geom.h);
+       update_camera();
+
+       if(GL::ARB_shader_objects)
+       {
+               shprog = new GL::Program;
+               GL::ProgramBuilder::StandardFeatures features;
+               features.material = true;
+               features.texture = true;
+               GL::ProgramBuilder(features).add_shaders(*shprog);
+               shprog->link();
+       }
+       else
+               shprog = 0;
+
        update_style();
 
        if(mouse)
@@ -50,10 +70,18 @@ void Root::init(Graphics::Window *window)
                keyboard->signal_button_release.connect(sigc::mem_fun(this, &Root::key_release_event));
                keyboard->signal_character.connect(sigc::mem_fun(this, &Root::character_event));
        }
+
+       if(touchscreen)
+       {
+               touchscreen->signal_button_press.connect(sigc::mem_fun(this, &Root::touch_press_event));
+               touchscreen->signal_button_release.connect(sigc::mem_fun(this, &Root::touch_release_event));
+               touchscreen->signal_axis_motion.connect(sigc::mem_fun(this, &Root::touch_motion_event));
+       }
 }
 
 Root::~Root()
 {
+       delete shprog;
        if(own_input)
        {
                delete keyboard;
@@ -109,11 +137,10 @@ void Root::tick()
 
 void Root::render() const
 {
-       GL::MatrixStack::projection() = GL::Matrix::ortho_bottomleft(geom.w, geom.h);
-       GL::MatrixStack::modelview() = GL::Matrix();
        GL::Bind bind_blend(GL::Blend::alpha());
 
-       GL::Renderer renderer(0);
+       GL::Renderer renderer(&camera);
+       renderer.set_shader_program(shprog);
        Widget::render(renderer);
 }
 
@@ -225,12 +252,81 @@ bool Root::character_event(StringCodec::unichar ch)
        return false;
 }
 
+bool Root::touch_press_event(unsigned finger)
+{
+       if(visible)
+       {
+               Widget *old_focus = touch_focus;
+
+               int x, y;
+               get_touch(finger, x, y);
+               touch_press(x, y, finger);
+
+               if(touch_focus || old_focus)
+                       return true;
+       }
+
+       return false;
+}
+
+bool Root::touch_release_event(unsigned finger)
+{
+       if(visible)
+       {
+               Widget *old_focus = touch_focus;
+
+               int x, y;
+               get_touch(finger, x, y);
+               touch_release(x, y, finger);
+
+               if(touch_focus || old_focus)
+                       return true;
+       }
+
+       return false;
+}
+
+bool Root::touch_motion_event(unsigned axis, float, float)
+{
+       if(visible)
+       {
+               unsigned finger = axis/2;
+               int x, y;
+               get_touch(finger, x, y);
+               touch_motion(x, y, finger);
+
+               if(touch_focus)
+                       return true;
+       }
+
+       return false;
+}
+
 void Root::get_pointer(int &x, int &y)
 {
        x = (mouse->get_axis_value(0)*0.5+0.5)*geom.w;
        y = (mouse->get_axis_value(1)*0.5+0.5)*geom.h;
 }
 
+void Root::get_touch(unsigned finger, int &x, int &y)
+{
+       x = (touchscreen->get_axis_value(finger*2)*0.5+0.5)*geom.w;
+       y = (touchscreen->get_axis_value(finger*2+1)*0.5+0.5)*geom.h;
+}
+
+void Root::update_camera()
+{
+       camera.set_position(GL::Vector3(geom.w/2.0f, geom.h/2.0f, geom.h/2.0f));
+       camera.set_depth_clip(geom.h*0.1f, geom.h*0.9f);
+       camera.set_orthographic(geom.w, geom.h);
+}
+
+void Root::on_geometry_change()
+{
+       Panel::on_geometry_change();
+       update_camera();
+}
+
 void Root::on_child_added(Widget &wdg)
 {
        if(&wdg!=lbl_tooltip)